geometric dimensioning tolerancing 102
DESCRIPTION
Basics of Geometric Dimensioning & TolerancingTRANSCRIPT
R
EV. A
G
eom
etri
c D
imen
sion
ing
&
Tole
ranc
ing
ASM
E Y1
4.5M
, 19
94
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
2 o
f 102
Tabl
e of
Con
tent
s 1.
Gen
eral
Rul
es...
......
......
......
......
......
......
......
......
.3
2. G
eom
etric
Cha
ract
eris
tics
and
Sym
bols
......
.....
8
3. D
atum
......
......
......
......
......
......
......
......
......
......
..19
4. F
orm
Tol
eran
ce...
......
......
......
......
......
......
......
..46
5. O
rient
atio
n To
lera
nce.
......
......
......
......
......
......
.54
6. P
rofil
e To
lera
nce
......
......
......
......
......
......
......
...65
7. R
unou
t Tol
eran
ce...
......
......
......
......
......
......
.....
75
8. L
ocat
ion
Tole
ranc
e...
......
......
......
......
......
......
...83
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
3 o
f 102
1. G
ener
al R
ules
1.1.
Rul
e 1
– Li
mits
of S
ize
1.1.
1. I
ndiv
idua
l Fea
ture
of S
ize
Whe
re o
nly
a to
lera
nce
of s
ize
is s
peci
fied,
the
limits
of s
ize
of a
n in
divi
dual
feat
ure
pres
crib
e th
e ex
tent
to w
hich
var
iatio
ns in
its
geom
etric
form
and
siz
e ar
e al
low
ed.
1.1.
2. V
aria
tions
of S
ize
The
actu
al s
ize
of a
n in
divi
dual
fea
ture
at
any
cros
s-se
ctio
n sh
all
be w
ithin
the
sp
ecifi
ed to
lera
nce
of s
ize.
1.1.
3. V
aria
tions
of F
orm
(Env
elop
e Pr
inci
ple)
a)
The
sur
face
or s
urfa
ces
of a
feat
ure
shal
l not
ext
end
beyo
nd a
bou
ndar
y (e
nvel
ope)
of
per
fect
form
at M
axim
um M
ater
ial C
ondi
tion
(MM
C).
Thi
s bo
unda
ry is
the
true
geom
etric
form
repr
esen
ted
by th
e dr
awin
g. N
o va
riatio
n in
form
is p
erm
itted
if th
e fe
atur
e is
pro
duce
d at
its
MM
C li
mit
of s
ize.
n20
+0.1
-0.1
n20
.1(L
MC
)
n20
+0.1
-0.1
n20
.1 (M
MC
)
n19
.9(L
MC
)
n19
.9 (L
MC
)
n19
.9(M
MC
)
n19
.9(M
MC
)n
20.1
(MM
C)
n20
.1(L
MC
)
BOU
ND
ARY
OF
PER
FEC
T FO
RM
AT M
MC
EXTE
RN
AL F
EATU
RE
INTE
RN
AL F
EATU
RE
b) W
here
the
act
ual
loca
l si
ze o
f a
feat
ure
has
depa
rted
from
MM
C t
owar
d Le
ast
Mat
eria
l Con
ditio
n (L
MC
), a
varia
tion
in fo
rm is
allo
wed
equ
al to
the
amou
nt o
f suc
h de
partu
re.
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
4 o
f 102
c)
The
re i
s no
req
uire
men
t fo
r a
boun
dary
of
perfe
ct f
orm
as
LMC
.
1.
1.4.
Rel
atio
nshi
p be
twee
n In
divi
dual
Fea
ture
s Th
e lim
its o
f si
ze d
o no
t co
ntro
l th
e or
ient
atio
n or
loc
atio
n re
latio
nshi
p be
twee
n in
divi
dual
feat
ures
.
Feat
ures
sh
own
perp
endi
cula
r, co
axia
l, or
sy
mm
etric
al
to
each
ot
her
mus
t be
co
ntro
lled
for l
ocat
ion
or o
rient
atio
n to
avo
id in
com
plet
e dr
awin
g re
quire
men
ts.
1.2.
Rul
e 2
– A
pplic
abili
ty o
f Fea
ture
Siz
e Ap
plic
abilit
y of
mat
eria
l co
nditi
on m
odifi
er (
RFS
, M
MC
, LM
C)
is l
imite
d to
fea
ture
s su
bjec
t to
varia
tions
in s
ize.
They
may
be
datu
m f
eatu
res
or o
ther
fea
ture
s w
hose
axe
s or
cen
tre p
lane
s ar
e co
ntro
lled
by g
eom
etric
tole
ranc
es.
FO
R A
LL A
pplic
able
Geo
met
ric T
oler
ance
s: R
FS a
pplie
s w
ill re
spec
t to
the
indi
vidu
al
tole
ranc
e, d
atum
refe
renc
e, o
r bot
h, w
here
NO
MO
DIF
YIN
G S
YMBO
L is
spe
cifie
d.
.
“A
SME
Y14.
5-19
94”
j n0.5 A
j n0.5m
Am
j n0.5m
A
1.3.
Rul
e 3
All o
ther
con
trols
is im
plie
d R
egar
dles
s of
Fea
ture
Siz
e (R
FS).
1.4.
Pitc
h R
ule
a) E
ach
tole
ranc
e of
orie
ntat
ion
or p
ositi
on a
nd d
atum
refe
renc
e sp
ecifi
ed fo
r a s
crew
th
read
app
lies
to th
e ax
is o
f the
thre
ad d
eriv
ed fr
om th
e pi
tch
cylin
der.
j n0.5 A
AMAJOR n
MAJOR n
LMC
SIZE
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
5 o
f 102
b) E
ach
tole
ranc
e of
orie
ntat
ion
or p
ositi
on a
nd d
atum
refe
renc
e sp
ecifi
ed fo
r fea
ture
s ot
her
than
scr
ew th
read
s, s
uch
as g
ears
and
spl
ines
, mus
t des
igna
te th
e sp
ecifi
c fe
atur
e to
whi
ch e
ach
appl
ies.
j n0.5 A
APD n
PD n
Inte
rnal
Thr
ead
(tapp
ing)
Exte
rnal
Thr
ead
(scr
ew)
1.
5. V
irtua
l Con
ditio
n A
cons
tant
bou
ndar
y ge
nera
ted
by t
he c
olle
ctiv
e ef
fect
s of
a s
ize
feat
ure’
s sp
ecifi
ed
MM
C o
r LM
C m
ater
ial c
ondi
tion
and
the
geom
etric
tole
ranc
e fo
r tha
t mat
eria
l con
ditio
n.
Th
e vi
rtual
con
ditio
n of
a f
eatu
re i
s th
e ex
trem
e bo
unda
ry o
f th
at f
eatu
re w
hich
re
pres
ents
the
‘wor
st c
ase’
for,
typi
cally
, suc
h co
ncer
ns a
s a
clea
ranc
e of
fit p
ossi
bilit
y re
lativ
e to
a m
atin
g pa
rt or
situ
atio
n.
PI
N:
VC =
Siz
e M
MC
+ T
oler
ance
VC =
Siz
e LM
C –
Tol
eran
ce
HO
LE:
VC =
Siz
e M
MC
– T
oler
ance
VC
= S
ize
LMC
+ T
oler
ance
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
6 o
f 102
1.6.
Ex
erci
se
1.
A(n
) __
____
____
____
___
is a
num
eric
al v
alue
exp
ress
ed i
n ap
prop
riat
e un
its o
f m
easu
re,
indi
cate
d on
a d
raw
ing
and
in d
ocum
ents
to
defin
e th
e si
ze a
nd/o
r ge
omet
ric
char
acte
rist
ics
and/
or lo
catio
ns o
f fea
ture
s of
a p
art.
2.
____
____
____
____
_ is
a g
ener
al te
rm a
pplie
d to
a p
hysi
cal p
ortio
n of
a p
art.
3.
Def
ine
Tole
ranc
e.
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
4.
All
Dim
ensi
ons
shal
l hav
e a
tole
ranc
e ex
cept
for d
imen
sion
s th
at a
re id
entif
ied
as:
a)
refe
renc
e.
b)
m
axim
um.
c)
m
inim
um.
d)
stoc
k si
zes.
e)
all o
f the
abo
ve.
5.
W
hat a
re th
e lim
it of
the
dim
ensi
on 2
5±0.
4? _
____
____
____
____
__
6.
Wha
t is t
he to
lera
nce
of th
e di
men
sion
in q
uest
ion
5?__
____
____
__
7.
Wha
t is t
he n
omin
al d
imen
sion
of t
he d
imen
sion
show
n in
que
stio
n 5?
__
____
____
____
____
_ 8.
G
ive
an e
xam
ple
of a
n eq
ual b
ilate
ral t
oler
ance
. ___
____
____
____
_ 9.
G
ive
an e
xam
ple
of a
n un
equa
l bila
tera
l tol
eran
ce. _
____
____
____
_ 10
. Giv
e an
exa
mpl
e of
a u
nila
tera
l tol
eran
ce. _
____
____
____
____
____
11
. Def
ine
Max
imum
Mat
eria
l Con
ditio
n (M
MC
).
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
12. W
hat i
s the
MM
C o
f the
feat
ure
show
n be
low
?
n15.00+
0.25
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
7 o
f 102
13. W
hat i
s the
MM
C o
f the
feat
ure
show
n be
low
? __
____
____
____
___
n15.00+
0.25
14. D
efin
e Le
ast M
ater
ial C
ondi
tion
(LM
C).
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
_
15. W
hat i
s the
LM
C o
f the
feat
ure
show
n in
que
stio
n 12
? __
____
____
__
16
. Wha
t is t
he L
MC
of t
he fe
atur
e sh
own
in q
uest
ion
13?
____
____
___
17. L
ist
the
thre
e ge
nera
l gro
ups
rela
ted
to t
he s
tand
ard
AN
SI f
its b
etw
een
mat
ing
part
s.
1)
____
____
____
____
____
____
____
____
____
____
____
____
____
2)
____
____
____
____
____
____
____
____
____
____
____
____
____
3)
____
____
____
____
____
____
____
____
____
____
____
____
____
18
. Is t
he fi
t bet
wee
n th
e tw
o pa
rts s
how
n be
low
a c
lear
ance
or a
forc
e fit
?
____
____
____
____
____
____
____
____
____
____
____
____
____
__
19.43
19.18
n19.76
19.50
n
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
8 o
f 102
2. G
eom
etric
Cha
ract
eris
tics
and
Sym
bols
2.
1. S
ymbo
l
Type
of
Tole
ranc
e C
hara
cter
istic
Sy
mbo
l
ASM
E Y1
4.5M
-199
4
Sym
bol
ISO
Stra
ight
ness
u
u
Fl
atne
ss
c
c
Cir
cula
rity
e
e
For
Indi
vidu
al
Feat
ures
Form
Cyl
indr
icity
g
g
Pr
ofile
of a
Lin
e k
k
Fo
r In
divi
dual
or
Rel
ated
Fe
atur
es
Prof
ile
Prof
ile o
f a S
urfa
ce
d
d
Ang
ular
ity
a
a
Perp
endi
cula
rity
b
b
Ori
enta
tion
Para
llelis
m
f
f
Posi
tion
j
j
Con
cent
rici
ty
r
r
Loca
tion
Sym
met
ry
i
i
Cir
cula
r Run
out
h
h
For R
elat
ed
Feat
ures
Runo
ut
Tota
l Run
out
t
t
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
9 o
f 102
Sy
mbo
l for
: A
SME
Y14.
5M
ISO
A
t Max
imum
Mat
eria
l C
ondi
tion
m
m
At L
east
Mat
eria
l Con
ditio
n l
l
Rega
rdle
ss o
f Fea
ture
Siz
e NONE
NONE
Proj
ecte
d To
lera
nce
Zone
p
p
Dia
met
er
n
n
Sphe
rica
l Dia
met
er
Sn
Sn
Squa
re
o
o
Num
ber o
f Pla
ces
X X
Cou
nter
bore
v
v
C
ount
ersi
nk
w
w
Dep
th
x
x
All
Roun
d
Be
twee
n
NONE
Arc
Len
gth
10
10
Radi
us
R
R
Sphe
rica
l Rad
ius
SR
SR
Con
trol
led
Radi
us
CR
NONE
Con
ical
Tap
er
y
y
Slop
e z
z
Ta
ngen
t Pla
ne
T
T
Free
Sta
te
F
F
Stat
istic
al T
oler
ance
ST
NONE
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
10
of 1
02
Radi
us, C
ontr
olle
d Ra
dius
Th
ere
are
two
type
s of
radi
i tol
eran
ce th
at c
an b
e ap
plie
d, th
e ra
dius
and
con
trolle
d ra
dius
. Th
e ra
dius
(R) t
oler
ance
is fo
r gen
eral
app
licat
ions
. Th
e co
ntro
lled
radi
us (C
R) i
s us
ed
whe
n it
is n
eces
sary
to p
lace
furth
er re
stric
tions
on
the
shap
e of
the
radi
us, a
s in
hig
h st
ress
app
licat
ions
.
12.7
12.3
CR12
.712
.3R
Min
Rad
ius 1
2.3
Min
Rad
ius 1
2.3
Max
Rad
ius 1
2.7
Max
Rad
ius 1
2.7
Part
cont
our m
ust f
all w
ithin
zone
def
ined
by
Max
and
Min
radi
us to
lera
nce
Part
cont
our m
ust b
e a
fair
curv
e w
ith n
o re
vers
als.
All
radi
i poi
nts m
ust b
e 12
.3 m
into
12.
7 m
ax.
Rad
ius,
R
Con
trol
led
Rad
ius,
CR
On dr
awing
Mean
ing
On dr
awing
Mean
ing
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
11
of 1
02
Stat
istic
al T
oler
ance
O
ften,
tol
eran
ces
are
calc
ulat
ed o
n an
arit
hmet
ic b
asis
. T
oler
ance
s ar
e as
sign
ed t
o in
divi
dual
feat
ures
on
a co
mpo
nent
by
divi
ding
the
tota
l ass
embl
y to
lera
nce
by th
e nu
mbe
r of
com
pone
nts
and
assi
gnin
g a
porti
on o
f th
is t
oler
ance
to
each
com
pone
nt.
Whe
n to
lera
nces
are
sta
cked
up
in t
his
man
ner,
the
tole
ranc
e m
ay b
ecom
e ve
ry r
estri
ctiv
e or
tig
ht.
Stat
istic
al t
oler
anci
ng i
s th
e as
sign
men
t of
tol
eran
ces
to r
elat
ed c
ompo
nent
s of
an
asse
mbl
y on
the
basi
s of
sou
nd s
tatis
tics.
An
exam
ple
is, t
he a
ssem
bly
tole
ranc
e is
equ
al
to th
e sq
uare
root
of t
he s
um o
f the
squ
ares
of t
he in
divi
dual
tole
ranc
e.
Stat
istic
al T
oler
ance
may
be
appl
ied
to f
eatu
res
to i
ncre
ase
tole
ranc
es a
nd r
educ
e m
anuf
actu
ring
cost
. T
o en
sure
com
patib
ility,
the
lar
ger
tole
ranc
e id
entif
ied
by t
he
stat
istic
al to
lera
nce
sym
bol m
ay o
nly
be u
sed
whe
re a
ppro
pria
te s
tatis
tical
pro
cess
con
trol
will
be u
sed.
A n
ote
such
as
the
one
show
n be
low
sha
ll be
pla
ced
on th
e dr
awin
g.
16.0
715
.93
n20
.219
.8n
16.1
15.9
n
0.2
A
B
0.5
A
B
NO
TE:
FEA
TUR
ES IN
DEN
TIFI
ED A
S ST
ATI
STIC
AL
TOLE
RA
NC
E
SH
ALL
BE
PRO
DU
CED
WIT
H S
TATI
STIC
AL
PR
OC
ESS
CO
NTR
OLS
, OR
TO
TH
E M
OR
E R
ESTR
ICTI
VE
AR
ITH
MET
ICLI
MIT
S
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
12
of 1
02
Free
Sta
te
Unl
ess
othe
rwis
e sp
ecifi
ed,
all
dim
ensi
onin
g an
d to
lera
ncin
g ap
plie
s in
a f
ree
stat
e co
nditi
on w
ith n
o re
stra
int.
Som
e pa
rts,
such
as
shee
t m
etal
, th
in m
etal
, pl
astic
s an
d ru
bber
are
non
-rigi
d in
nat
ure.
It m
ay b
e ne
cess
ary
to s
peci
fy d
esig
n re
quire
men
ts o
n th
e pa
rt in
a n
atur
al o
r fre
e st
ate
as w
ell a
s in
a re
stra
ined
con
ditio
n. T
he re
stra
int o
r for
ce o
n th
e no
nrig
hi9d
par
ts is
usu
ally
app
lied
in s
uch
a m
anne
r to
res
embl
e or
app
roxi
mat
e th
e fu
nctio
nal o
r mat
ing
requ
irem
ents
. A
note
or
spec
ifica
tion
on th
e dr
awin
g sh
ould
exp
lain
how
the
part
is r
estra
ined
and
the
forc
e re
quire
d to
fac
ilitat
e th
e re
stra
int.
A s
ampl
e no
te c
an b
e fo
und
on t
he d
raw
ing
belo
w.
The
free
stat
e sy
mbo
l m
eans
tha
t di
men
sion
s an
d to
lera
nces
tha
t ha
ve t
he f
ree
stat
e sy
mbo
l app
lied
are
chec
ked
in th
e fre
e st
ate
and
not i
n th
e re
stra
ined
con
ditio
n.
3F
2 SU
RF
2 SU
RF
n4X
5
.4 -
5.6
0.2
Mn
A
BA
65
32
25
36.8
5.6
UN
LESS
OTH
ERW
ISE
SPEC
IFIE
D, A
LL U
NTO
LER
AN
CED
DIM
ENSI
ON
S A
RE
BA
SIC
. P
AR
T IS
TO
BE
RES
TRA
INED
ON
DA
TUM
A W
ITH
4 5
M S
CR
EWS
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
13
of 1
02
ASM
E Y1
4 Se
ries
ISO
Sta
ndar
ds
Y14.
2 –
Line
s &
Lette
ring
3098
Y14.
3 –
Sect
ions
& V
iew
s12
8
Y14.
5 –
Dim
ensi
onin
g &
Tole
ranc
ing
129,
406
, 110
1, 1
660,
R
1661
, 269
2, 5
455,
54
58, 5
459,
708
3,
8015
, 105
79; (
also
14
660-
1 &
1466
0-2)
Y14.
6 –
Scre
w T
hrea
d R
epre
sent
atio
n 64
10-1
, 641
0-2,
641
0-3
Y14.
8 –
Cas
ting
& Fo
rgin
gs
Y14.
36 –
Sur
face
Tex
ture
Sy
mbo
ls
1302
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
14
of 1
02
Ba
sic
Dim
ensi
on
(theo
retic
ally
exa
ct d
imen
sion
in IS
O)
65
Ref
eren
ce D
imen
sion
(aux
iliary
dim
ensi
on
in IS
O)
(68)
A
Dat
um F
eatu
re
A
Dim
ensi
on O
rigin
Feat
ure
Con
trol F
ram
e C
BA
Ø 0
.5M
Dat
um T
arge
t Are
a Ø
8A1
A1
Ø20
D
atum
Tar
get P
oint
A1
D
atum
Tar
get L
ine
A1
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
15
of 1
02
Geo
met
ric C
hara
ctie
ristic
Ove
rvie
w
Applicability of Datum Modifiers
N/A
N/A
N/A
N/A
N/A
Yes if size features
Yes if size features
Yes if size features
No
No
Yes if size features
Yes if size features
Yes if size features
No
No
Applicability of Feature Modifiers
No
Yes
No
No
No
No
No
Yes
No
No
Yes if size features
Yes if size features
Yes if size features
No
No
Surface
X
X
X
X
X
X
X
X
X
X
X
Controls
Axis or Median Plane
X
X
X
X
X
2D or 3D
2D
3D
3D
2D
3D
2D
3D
3D
3D
3D
3D
3D
3D
2D
3D
Symbol
u
u
c
e
g
k
d
j
r
i
a
b
f
h
t
Characteristic
Straightness Line Element Straightness Axis or Median Plane
Flatness
Circularity
Cylindricity
Profile of a Line
Profile of a Surface
Position
Concentricity
Symmetry
Angularity
Perpendicularity
Parallelism
Circular Runout
Total Runout
Type of Tolerance
Form
Profile
Location
Orientation
Runout
Datums
Datums NOT allowed
Datums Required
Datums Requied
There are special case where position and profile may not require datums These characteristics control opposing median points Can also control surface boundary Can control form, orientation and location These characteristics can be made 2D by writing “LINE ELEMENTS” under the feature control frame
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
16
of 1
02
2.2
Exe
rcis
e
A d
imen
sion
ing
and
tole
ranc
ing
tem
plat
e is
reco
mm
ende
d fo
r dra
win
g pr
oper
sy
mbo
ls o
n th
is te
st a
nd o
n fu
ture
test
s.
1.
Li
st th
e fiv
e ba
sic
type
s of
geo
met
ric
dim
ensi
onin
g an
d to
lera
ncin
g sy
mbo
ls.
a) _
____
____
____
____
____
____
____
____
____
____
____
____
____
____
___
b) _
____
____
____
____
____
____
____
____
____
____
____
____
____
____
___
c)
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
d) _
____
____
____
____
____
____
____
____
____
____
____
____
____
____
___
e)
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
2.
Nam
e th
e fiv
e ty
pes
of g
eom
etri
c ch
arac
teri
stic
sym
bols
.
a) _
____
____
____
____
____
____
____
____
____
____
____
____
____
____
___
b) _
____
____
____
____
____
____
____
____
____
____
____
____
____
____
___
c)
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
d) _
____
____
____
____
____
____
____
____
____
____
____
____
____
____
___
e)
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
3.
Nam
e ea
ch o
f the
follo
win
g ge
omet
ric
char
acte
rist
ic sy
mbo
ls.
u
____
____
____
____
___
r
____
____
____
____
___
c
____
____
____
____
___
i
____
____
____
____
___
e
____
____
____
____
___
f
____
____
____
____
___
g
____
____
____
____
___
a
____
____
____
____
___
k
____
____
____
____
___
b
____
____
____
____
___
d
____
____
____
____
___
h
____
____
____
____
___
j
____
____
____
____
___
t
____
____
____
____
___
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
17
of 1
02
4.
Any
lette
r of t
he a
lpha
bet c
an b
e us
ed to
iden
tify
a da
tum
exc
ept f
or _
___,
___
_, o
r
____
.
5.
Whe
n m
ay d
atum
feat
ure
sym
bols
be
repe
ated
on
a dr
awin
g?
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
__
____
____
____
____
____
____
____
____
____
____
____
____
__
6.
Wha
t inf
orm
atio
n is
pla
ced
in th
e lo
wer
hal
f of t
he d
atum
targ
et sy
mbo
l?
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
__
____
____
____
____
____
____
____
____
____
____
____
____
__
7.
Wha
t inf
orm
atio
n is
pla
ced
in th
e to
p ha
lf of
the
datu
m ta
rget
sym
bol?
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
__
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
__
____
____
____
____
____
____
____
____
____
__
8.
Labe
l the
par
ts o
f the
follo
win
g fe
atur
e co
ntro
l fra
me.
(A)
(B)
(C)
(D)
(E)
(F)
(G)
j n0.05m A Bm C
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
18
of 1
02
9.
Com
plet
ely
defin
e th
e te
rm “
basi
c di
men
sion
”.
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
__
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
__
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
__
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
__
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
__
10. H
ow a
re b
asic
dim
ensi
ons
show
n on
a d
raw
ing?
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
__
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
__
____
____
____
____
____
____
____
____
____
__
11. N
ame
the
follo
win
g sy
mbo
ls.
n
____
____
____
____
___
r
____
____
____
____
___
R __
____
____
____
____
_ o
____
____
____
____
___
SR
____
____
____
____
___
(68)
____
____
____
____
___
CR
____
____
____
____
___
x
____
____
____
____
___
Sn
____
____
____
____
___
__
____
____
____
____
_
X __
____
____
____
____
_ y
__
____
____
____
____
_ v
__
____
____
____
____
_ z
__
____
____
____
____
_ w
__
____
____
____
____
_ ST
__
____
____
____
____
_
__
____
____
____
____
_ 6
5
____
____
____
____
___
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
19
of 1
02
3. D
atum
3.1.
Dat
um C
once
pts
A
datu
m is
a th
eore
tical
ly e
xact
poi
nt, a
xis,
or
plan
e de
rived
from
the
true
geom
etric
co
unte
rpar
t of a
spe
cifie
d da
tum
feat
ure.
A d
atum
is th
e or
igin
from
whi
ch th
e lo
catio
n of
geo
met
ric c
hara
cter
istic
s of
fea
ture
s of
a p
art
are
esta
blis
hed.
D
atum
s ar
e es
tabl
ishe
d by
sp
ecifi
ed
feat
ures
or
su
rface
s.
W
here
or
ient
atio
n or
po
sitio
n re
latio
nshi
ps a
re s
peci
fied
from
a d
atum
, the
feat
ures
invo
lved
are
loca
ted
with
resp
ect
to th
is d
atum
and
not
with
resp
ect t
o on
e an
othe
r.
Ever
y fe
atur
e on
a p
art c
an b
e co
nsid
ered
a p
ossi
ble
datu
m.
That
is, e
very
feat
ure
show
n on
a d
raw
ing
depi
cts
a th
eore
tical
ly e
xact
geo
met
ric s
hape
as
spec
ified
by
the
desi
gn r
equi
rem
ents
. H
owev
er,
a fe
atur
e no
rmal
ly h
as n
o pr
actic
al m
eani
ng a
s a
datu
m u
nles
s it
is a
ctua
lly u
sed
for
som
e fu
nctio
nal
rela
tions
hip
betw
een
feat
ures
. Th
us a
dat
um a
ppea
ring
on a
n en
gine
erin
g dr
awin
g ca
n be
con
side
red
to h
ave
a du
al
natu
re: i
t is
(1)
a “c
onst
ruct
ion”
dat
um, w
hich
is g
eom
etric
ally
exa
ct r
epre
sent
atio
n of
an
y pa
rt fe
atur
e, a
nd (
2) a
“re
latio
nshi
p” d
atum
, whi
ch is
any
feat
ure
used
as
a ba
sis
for a
func
tiona
l rel
atio
nshi
p w
ith o
ther
feat
ures
on
the
part.
Sin
ce th
e da
tum
con
cept
is
used
to
esta
blis
h re
latio
nshi
ps,
the
“rela
tions
hip”
dat
um i
s th
e on
ly t
ype
used
on
engi
neer
ing
draw
ings
.
By th
e ab
ove
defin
ition
, a d
atum
on
an e
ngin
eerin
g dr
awin
g is
alw
ays
assu
med
to b
e “p
erfe
ct”.
How
ever
, sin
ce p
erfe
ct p
arts
can
not b
e pr
oduc
ed, a
dat
um o
n a
phys
ical
ly
prod
uced
par
t is
ass
umed
to
exis
t in
the
con
tact
of
the
actu
al f
eatu
re s
urfa
ce w
ith
prec
ise
man
ufac
turin
g or
insp
ectio
n eq
uipm
ent s
uch
as m
achi
ne ta
bles
, sur
face
pla
tes,
ga
ge p
ins,
etc
. T
hese
are
cal
led
datu
m s
imul
ator
s w
hich
cre
ate
sim
ulat
ed d
atum
pl
anes
, ax
es,
etc.
, an
d, w
hile
not
per
fect
ly tr
ue,
are
usua
lly o
f su
ch h
igh
qual
ity t
hat
they
ade
quat
ely
sim
ulat
e tru
e re
fere
nces
. T
his
cont
act
of t
he a
ctua
l fe
atur
e w
ith
prec
ise
equi
pmen
t is
als
o as
sum
ed t
o si
mul
ate
func
tiona
l con
tact
with
a m
atin
g pa
rt su
rface
.
Dat
um fe
atur
e: T
he a
ctua
l sur
face
of t
he p
art.
Si
mul
ated
dat
um:
The
plan
e es
tabl
ishe
d by
the
ins
pect
ion
equi
pmen
t su
ch a
s a
surfa
ce p
late
or i
nspe
ctio
n ta
ble.
Dat
um
plan
e:
The
theo
retic
ally
ex
act
plan
e es
tabl
ishe
d by
th
e tru
e ge
omet
ric
coun
terp
art o
f the
dat
um fe
atur
e.
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
20
of 1
02
3.2.
Est
ablis
hing
Dat
um P
lane
s
Dat
um f
eatu
res
are
sele
cted
bas
ed o
n th
eir
impo
rtanc
e to
the
des
ign
of t
he p
art.
Gen
eral
ly t
hree
dat
um f
eatu
res
are
sele
cted
tha
t ar
e pe
rpen
dicu
lar
to e
ach
othe
r.
Thes
e th
ree
datu
ms
are
calle
d th
e da
tum
refe
renc
e fra
me.
The
dat
ums
that
mak
e up
th
e da
tum
refe
renc
e fra
me
are
refe
rred
to a
s th
e pr
imar
y da
tum
, sec
onda
ry d
atum
, and
te
rtiar
y da
tum
. A
s th
eir
nam
es i
mpl
y, t
he p
rimar
y da
tum
is
the
mos
t im
porta
nt,
follo
wed
by
the
othe
r tw
o in
ord
er o
f im
porta
nce.
90O
90O
90O
90O
MEA
SUR
ING
DIR
ECTI
ON
FOR
REL
ATED
DIM
ENSI
ON
SESTA
BLI
SH T
ERTI
ARY
DAT
UM
PLAN
E (M
IN 1
PO
INT)
CO
NTA
CT
WIT
H D
ATU
M S
UR
FAC
E C
ESTA
BLI
SH S
ECO
ND
ARY
DAT
UM
PLAN
E (M
IN 2
PO
INT)
CO
NTA
CT
WIT
H D
ATU
M S
UR
FAC
E B
ESTA
BLI
SH P
RIM
ARY
DAT
UM
PLAN
E (M
IN 3
PO
INT)
CO
NTA
CT
WIT
H D
ATU
M S
UR
FAC
E A
Sim
ulat
ed D
atum
Sur
face
of m
anuf
actu
ring
or v
erifi
catio
n eq
uipm
ent
Dat
um P
lane
–
theo
retic
ally
exa
ct
Part
Dat
um F
eatu
re
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
21
of 1
02
3.3.
Dat
um Id
entif
icat
ion
W
hen
a su
rface
is u
sed
to e
stab
lish
a da
tum
pla
ne o
n a
part,
the
datu
m fe
atur
e sy
mbo
l is
pla
ced
on th
e ed
ge v
iew
of t
he s
urfa
ce o
r on
an e
xten
sion
line
in th
e vi
ew w
here
the
surfa
ce a
ppea
rs a
s a
line.
A
lead
er li
ne m
ay a
lso
be u
sed
to c
onne
ct th
e da
tum
fe
atur
e sy
mbo
l to
the
view
in s
ome
appl
icat
ions
.
Dat
um A
xis
90o
90o
90o
Dat
um A
xis
Dire
ctio
n of
mea
sure
men
ts
Dat
um P
lane
sor
igin
of
mea
sure
men
tD
atum
Axi
s
Dat
um P
oint
Dat
um F
eatu
re S
ymbo
lpl
aced
on
edge
vie
w o
fsu
rfac
e or
ext
ensi
on li
nefr
om e
dge
view
B
C
AA
10
C30
50
B
Surf
ace
Dat
um F
eatu
re S
ymbo
lm
ust b
e of
fset
from
dim
ensi
onlin
e ar
row
head
s
D
Ang
led
Surf
ace
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
22
of 1
02
3.4.
Dat
um A
xis
A
cylin
dric
al o
bjec
t may
be
a da
tum
feat
ure.
Whe
n th
e cy
lindr
ical
dat
um fe
atur
e is
us
ed, t
he c
entre
axi
s is
kno
wn
as th
e da
tum
axi
s. T
here
are
two
theo
retic
al p
lane
s in
ters
ectin
g at
90º
. Th
ese
plan
es a
re re
pres
ente
d by
the
cent
relin
es o
f the
dra
win
g.
Whe
re th
ese
plan
es in
ters
ect i
s re
ferre
d to
as
the
datu
m a
xis.
The
dat
um a
xis
is th
e or
igin
for r
elat
ed d
imen
sion
s, w
hile
the
X an
d Y
plan
es in
dica
te th
e di
rect
ion
of
mea
sure
men
t. A
dat
um p
lane
is a
dded
to th
e en
d of
the
obje
ct to
est
ablis
h th
e da
tum
fra
me.
Pl
acem
ent o
f the
Dat
um F
eatu
re S
ymbo
l for
a D
atum
Axi
s
YT
ER
TIA
RY
DA
TU
M30
30
3030
Y
X
n80
AXIS
A
B
PAR
TPR
IMA
RY
DA
TU
M P
LA
NE
X SEC
ON
DA
RY
DA
TU
M
DA
TU
MA
XIS
n12A
A
A
n12
D
AB
CØ
0.4
M
n12
n12A
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
23
of 1
02
Si
mul
ated
dat
um a
xis
The
sim
ulat
ed d
atum
axi
s is
the
axis
of a
per
fect
cyl
indr
ical
insp
ectio
n de
vice
that
co
ntac
ts th
e da
tum
feat
ure
surfa
ce.
For
an e
xter
nal d
atum
feat
ure,
the
insp
ectio
n de
vice
is th
e sm
alle
st (M
MC
) circ
umsc
ribed
cyl
inde
r. T
he in
spec
tion
devi
ce fo
r an
inte
rnal
dat
um fe
atur
e is
the
larg
est (
MM
C) i
nscr
ibed
cyl
inde
r.
SIM
ULA
TED
DAT
UM
SMAL
LEST
CIR
CU
MSC
RIB
EDC
YLIN
DER
DAT
UM
FEA
TUR
E (P
ART)
DAT
UM
AXI
SD
ATU
M F
EATU
RE
SIM
ULA
TOR
DAT
UM
FEA
TUR
E SI
MU
LATO
R
DAT
UM
FEA
TUR
E (P
ART)
DAT
UM
AXI
S
SIM
ULA
TED
DAT
UM
LAR
GES
T IN
SCR
IBED
CYL
IND
ER
Sim
ulat
ed d
atum
axi
s for
an
exte
rnal
dat
um fe
atur
e
Sim
ulat
ed d
atum
axi
s for
an
inte
rnal
dat
um fe
atur
e
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
24
of 1
02
3.5.
Coa
xial
Dat
um F
eatu
res
C
oaxi
al m
eans
tw
o or
mor
e cy
lindr
ical
sha
pes
that
sha
re a
com
mon
axi
s.
Coa
xial
da
tum
feat
ures
exi
st w
hen
a si
ngle
dat
um a
xis
is e
stab
lishe
d by
two
datu
m fe
atur
es
that
are
coa
xial
. W
hen
mor
e th
an o
ne d
atum
fea
ture
is u
sed
to e
stab
lish
a si
ngle
da
tum
, th
e da
tum
ref
eren
ce l
ette
rs a
re s
epar
ated
by
a da
sh a
nd p
lace
d in
one
co
mpa
rtmen
t of t
he fe
atur
e co
ntro
l fra
me.
The
se d
atum
refe
renc
e le
tters
are
of e
qual
im
porta
nce
and
may
be
plac
ed in
any
ord
er.
3.6.
Dat
um A
xis
of S
crew
Thr
eads
, Gea
rs, a
nd S
plin
es
W
hen
a sc
rew
thre
ad is
use
d as
a d
atum
axi
s, th
e da
tum
axi
s is
est
ablis
hed
from
the
pitc
h cy
linde
r un
less
oth
erw
ise
spec
ified
. I
f an
othe
r fe
atur
e of
the
scr
ew t
hrea
d is
de
sire
d, th
en n
ote
“MAJ
OR
DIA
” or
“M
INO
R D
IA”
is p
lace
d ne
xt to
the
datu
m fe
atur
e sy
mbo
l.
A sp
ecifi
c fe
atur
e su
ch a
s th
e m
ajor
dia
met
er s
houl
d be
ide
ntifi
ed w
hen
a ge
ar o
r sp
line
is u
sed
as a
dat
um a
xis.
W
hen
this
is d
one,
the
note
“M
AJO
R D
IA”,
“MIN
OR
D
IA”,
or “P
ITC
H D
IA” i
s pl
aced
nex
t to
the
datu
m fe
atur
e sy
mbo
l as
appr
opria
te.
The
use
of a
scr
ew t
hrea
d, g
ear,
or s
plin
e sh
ould
be
avoi
ded
for
use
as a
dat
um a
xis
unle
ss n
eces
sary
.
AB
0.2
A-B
t
SIM
ULA
TED
PAI
R O
F C
OAX
IAL
CIR
CU
MSC
RIB
ED C
YLIN
DER
S
THE
DR
AW
ING
THE
MEA
NIN
G
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
25
of 1
02
3.7.
Dat
um C
ente
r Pla
ne
El
emen
ts o
n a
rect
angu
lar s
hape
d sy
mm
etric
al p
art o
r fea
ture
may
be
loca
ted
and
dim
ensi
oned
in re
latio
nshi
p to
a d
atum
cen
tre p
lane
. Th
e re
pres
enta
tion
and
rela
ted
mea
ning
of d
atum
cen
ter p
lane
sym
bols
are
as
show
n in
the
follo
win
g.
28A12
A
Dat
umC
ente
r Pla
neD
atum
Cen
ter P
lane
12 j0.2 m
ABm
C
12B
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
26
of 1
02
The
sim
ulat
ed d
atum
cen
tre p
lane
is
the
cent
re p
lane
of
a pe
rfect
rec
tang
ular
in
spec
tion
devi
ce t
hat
cont
acts
the
dat
um f
eatu
re s
urfa
ce.
For
an
exte
rnal
dat
um
feat
ure
the
datu
m c
entre
pla
ne i
s es
tabl
ishe
d by
tw
o pa
ralle
l pl
anes
at
min
imum
(M
MC
) se
para
tion.
For
an
inte
rnal
da
tum
fe
atur
e,
the
datu
m
cent
re
plan
e is
es
tabl
ishe
d by
two
para
llel p
lane
s at
max
imum
(MM
C) s
epar
atio
n.
Dat
um F
eatu
reSi
mul
ator
Dat
um C
ente
rPl
ane
A
Dat
umFe
atur
e A
Tru
e ge
omet
ric
coun
terp
art
of d
atum
feat
ure
A p
aral
lel
plan
es a
t mim
imum
sepa
rtat
ion
(MM
C)
Dat
umFe
atur
e A
Dat
um F
eatu
reSi
mul
ator
Dat
um C
ente
rPl
ane
A
Tru
e ge
omet
ric
coun
terp
art o
fda
tum
feat
ure
A p
aral
lel p
lane
sat
max
imum
sepa
rtat
ion
(MM
C)
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
27
of 1
02
3.8.
Pat
tern
of H
oles
as
a D
atum
The
cent
er o
f a p
atte
rn o
f fea
ture
s, s
uch
as th
e ho
les
in th
e pa
rt m
ay b
e sp
ecifi
ed a
s th
e da
tum
axi
s w
hen
the
datu
m fe
atur
e sy
mbo
l is
plac
ed u
nder
, and
atta
ched
to, t
he
mid
dle
of th
e fe
atur
e co
ntro
l fra
me.
In
this
app
licat
ion,
the
datu
m a
xis
is th
e ce
nter
of
the
hole
s as
a g
roup
.
n30
B
6X n8.4
8.0
j n0.05m A
6X 60
o
A
Dat
um A
xis
B
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
28
of 1
02
3.9.
Dat
um T
arge
ts
In
man
y si
tuat
ions
it is
not
pos
sibl
e to
est
ablis
h an
ent
ire s
urfa
ce, o
r ent
ire s
urfa
ces,
as
datu
ms.
W
hen
this
hap
pens
, th
en d
atum
tar
gets
may
be
used
to
esta
blis
h da
tum
pl
anes
.
This
pr
oced
ure
is
espe
cial
ly
usef
ul
on
parts
w
ith
surfa
ce
or
cont
our
irreg
ular
ities
, suc
h as
som
e sh
eet m
etal
, san
d ca
st, o
r for
ged
parts
that
are
sub
ject
to
bow
ing
or w
arpa
ge.
This
met
hod
can
also
be
appl
ied
to w
eldm
ents
whe
re h
eat m
ay
caus
e w
arpa
ge.
Dat
um ta
rget
s ar
e de
sign
ated
poi
nts,
line
s, o
r sur
face
are
as th
at a
re
used
to e
stab
lish
the
datu
m re
fere
nce
fram
e.
45
20
N1
N1
NN
L
M
N1 N1
45
NN
n12 N1
n6
N1
4545
2020
Dat
um T
arge
tPo
int
Dat
um T
arge
tLi
ne
Dat
um T
arge
t Are
aA
rea
Show
nD
atum
Tar
get A
rea
Are
a N
ot S
how
n
LL
MM
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
29
of 1
02
W
hen
datu
m ta
rget
poi
nts
are
used
on
a dr
awin
g to
iden
tify
a da
tum
pla
ne, t
he
datu
m p
lane
is e
stab
lishe
d by
loca
ting
pins
at t
he d
atum
tang
ent p
oint
s. T
he lo
catin
g pi
ns a
re ro
unde
d or
poi
nted
sta
ndar
d to
olin
g ha
rdw
are.
5015
40
35
15
X3X1X2
5015
X1,
X2
X3
Dat
umPl
ane
XL
ocat
ing
Pins
Dat
umFe
atur
e
The
Par
t
The
Dra
win
g
The
Fixt
ure
Setu
p
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
30
of 1
02
Area
s of
con
tact
may
als
o be
use
d to
est
ablis
h da
tum
s.
The
shap
e of
the
dat
um
targ
et a
rea
is o
utlin
ed b
y ph
anto
m li
nes
with
sec
tion
lines
thro
ugh
the
area
. C
ircul
ar
area
s ar
e di
men
sion
ed w
ith b
asic
or t
oler
ance
dim
ensi
ons
to lo
cate
d th
e ce
nter
. Th
e di
amet
er o
f the
targ
et a
rea
is p
rovi
ded
in th
e up
per h
alf o
f the
dat
um ta
rget
sym
bol o
r w
ith a
lead
er a
nd d
ot p
oint
ing
to th
e up
per h
alf.
The
loca
ting
pins
for t
arge
t are
as a
re
flat e
nd to
olin
g pi
ns w
ith th
e pi
n di
amet
er e
qual
to th
e sp
ecifi
ed s
ize
of th
e ta
rget
are
a.
20
X3,
n12
Dat
umPl
ane
X
Loc
atin
gPi
ns
Dat
umFe
atur
e
The
Fixt
ure
Setu
p
60
20
20
The
Dra
win
g
40
50n
12 X3
n12 X2
n12 X1
50 The
Par
t
X1,
n12
60
X2,
n12
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
31
of 1
02
Whe
n th
e ar
ea is
too
smal
l to
accu
rate
ly o
r cle
arly
dis
play
on
a dr
awin
g, a
dat
um
targ
et p
oint
is u
sed
at th
e ce
nter
loca
tion.
The
top
half
of th
e da
tum
targ
et s
ymbo
l id
entif
ies
the
diam
eter
of t
he ta
rget
are
a.
20
X3,
n6
Dat
umPl
ane
X
Loc
atin
gPi
ns
Dat
umFe
atur
e
The
Fixt
ure
Setu
p
60
20
20
The
Dra
win
g
40
50n
6 X
3n
6 X
2
n6
X1
50 The
Par
t
X1,
n6
60
X2,
n6
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
32
of 1
02
A da
tum
targ
et li
ne is
indi
cate
d by
the
targ
et p
oint
sym
bol “
X” o
n th
e ed
ge v
iew
of t
he
surfa
ce a
nd b
y a
phan
tom
line
on
the
surfa
ce v
iew
. If
the
loca
ting
pins
are
cyl
indr
ical
, th
en th
e da
tum
targ
et li
ne is
alo
ng th
e ta
ngen
cy w
here
the
pins
mee
t the
par
t. T
he
pins
may
als
o be
kni
fe-e
dged
. A
surfa
ce is
ofte
n pl
aced
at 9
0º to
the
pin
to c
reat
e th
e da
tum
refe
renc
e fra
me.
The
Fixt
ure
Setu
p
The
Dra
win
g50
Y1
Y1
50
Y
PAR
T
LOC
ATIN
G P
IN
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
33
of 1
02
Exam
ple
1 Fr
om A
SME
Y14.
5M-1
994,
p78
10
3
20
C1
A1
B1B2
A2
A3
C2
A
4010
0
n38
15
15
45o
45o
B2A3
A1B1
A2
C2
C1
4X n6.3-
6.4
j n0.1m
A B C
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
34
of 1
02
3.10
. Par
tial D
atum
Sur
face
A po
rtion
of a
sur
face
may
be
used
as
a da
tum
. Fo
r ex
ampl
e, th
is m
ay b
e do
ne
whe
n a
part
has
a ho
le o
r gro
up o
f hol
es a
t one
end
whe
re it
may
not
be
nece
ssar
y to
est
ablis
h th
e en
tire
surfa
ce a
s a
datu
m to
effe
ctiv
ely
loca
te th
e fe
atur
es.
This
m
ay b
e ac
com
plis
hed
on a
dra
win
g us
ing
a ch
ain
line
dim
ensi
oned
with
bas
ic
dim
ensi
ons
to s
how
the
loc
atio
n an
d ex
tent
of
the
parti
al d
atum
sur
face
. T
he
datu
m f
eatu
re s
ymbo
l is
atta
ched
to
the
chai
n lin
e.
The
datu
m p
lane
is
then
es
tabl
ishe
d at
the
loca
tion
of th
e ch
ain
line.
52
12
26T
HE
DR
AW
ING
THE
FIXT
UR
E SE
TUP
CH
AIN
LIN
E
DAT
UM
FEA
TUR
E
A
THEO
RET
ICAL
LYEX
ACT
DAT
UM
PLAN
ESI
MU
LATE
D D
ATU
M(F
IXTU
RE
SUR
FAC
E)
Geo
met
ric D
imen
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oler
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ng
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Y14.
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994
Page
35
of 1
02
3.11
. Exe
rcis
e 1.
Li
st th
e 3
prim
ary
item
s th
at a
re c
onsi
dere
d D
atum
feat
ures
on
an o
bjec
t or p
art.
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
_
2.
Dra
w th
e sy
mbo
l tha
t is
know
n as
the
Dat
um R
efer
ence
Sym
bol.
3.
The
prim
ary
datu
m re
quir
es a
min
imum
of _
____
____
poi
nts.
The
seco
ndar
y da
tum
requ
ires
a m
inim
um o
f ___
____
__ p
oint
s.
The
tert
iary
dat
um re
quir
es a
min
imum
of _
____
____
poi
nts.
4.
Belo
w a
re e
xam
ples
of a
hol
e (F
igur
e 1)
and
a p
in (F
igur
e 2)
that
will
be
iden
tifie
d as
da
tum
feat
ures
. Sk
etch
on
the
figur
e an
d ex
plai
n ho
w th
e da
tum
axi
s fo
r eac
h w
ould
be
det
erm
ined
. 5.
Geo
met
ric D
imen
sion
ing
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oler
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ng
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SME
Y14.
5M-1
994
Page
36
of 1
02
On
the
follo
win
g, F
igur
e 3,
iden
tify
the:
dat
um fe
atur
e, p
art,
sim
ulat
ed d
atum
, and
the
datu
m p
lane
.
a)__
____
____
____
____
b)__
____
____
____
____
d)__
____
____
____
____
c)__
____
____
____
____
Figu
re 3
O
n th
e fo
llow
ing
exer
cise
s, us
ing
the
draw
ing
prov
ided
on
next
pag
e (F
igur
e 4)
, 6.
Sp
ecify
the
left
hand
edg
e as
Dat
um A
. 7.
Sp
ecify
the
∅12
hol
e as
Dat
um D
. 8.
Sp
ecify
the
righ
t han
d ed
ge a
s D
atum
G.
9.
On
the
botto
m s
urfa
ce, s
peci
fy a
par
tial D
atum
K o
ver a
dis
tanc
e of
40
from
the
righ
t ed
ge o
f the
par
t. 10
. Spe
cify
the
righ
t han
d ed
ge o
f the
13
slot
as
Dat
um M
. 11
. Spe
cify
the
13 s
lot a
s D
atum
P.
12. S
peci
fy th
e tw
o ∅
6 ho
les
as D
atum
S.
13. D
atum
feat
ures
may
be
eith
er fe
atur
es o
f siz
e or
feat
ures
with
out s
ize.
On
the
draw
ing,
iden
tify
feat
ures
of s
ize
by p
laci
ng a
‘Z’ n
ext t
o th
em, a
nd id
entif
y th
e fe
atur
es w
ithou
t siz
e by
pla
cing
an
‘x’ n
ext t
o th
em.
Geo
met
ric D
imen
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oler
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ng
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SME
Y14.
5M-1
994
Page
37
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02
151
50
114
25
32
51
6 THRU 2X
16
13
70
16
12 THRU
Figure 4
Geo
met
ric D
imen
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oler
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ng
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Y14.
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994
Page
38
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02
14. W
hat i
s th
e re
latio
nshi
p be
twee
n th
e ce
nter
pla
ne o
f the
slo
t and
the
cent
er p
lane
of t
he
part
? W
hat i
s the
tota
l loc
atio
n to
lera
nce
that
the
cent
er p
lane
of t
he sl
ot v
ary
from
the
cent
er p
lane
of t
he p
art?
Is d
esig
n in
tent
cle
ar?
14+1 20
+ 0.
5
40+1
7+ 0
.5
PLU
S/M
INU
SM
ETH
OD
A
POSI
TIO
NA
LM
ETH
OD
FUN
CTI
ON
AL
GA
GE
Geo
met
ric D
imen
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ing
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oler
anci
ng
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SME
Y14.
5M-1
994
Page
39
of 1
02
The
pict
ure
belo
w re
pres
ents
a c
ast p
art.
It w
as d
eter
min
ed th
at th
e pa
rt s
houl
d ha
ve
datu
m ta
rget
s sp
ecifi
ed to
sta
ndar
dise
the
initi
al m
achi
ning
set
-up.
On
the
draw
ing
next
pa
ge, s
ketc
h th
e da
tum
targ
ets i
n pr
oper
form
at a
s you
wou
ld e
xpec
t to
see
them
on
an
engi
neer
ing
draw
ing.
Sur
face
X s
houl
d ha
ve th
ree
∅10
targ
et p
ads,
Sur
face
Y s
houl
d ha
ve tw
o ta
rget
s lin
es o
f con
tact
and
Sur
face
Z sh
ould
hav
e on
e po
int o
f con
tact
. A
rran
ge
thes
e ta
rget
s on
the
indi
cate
d su
rfac
es to
you
r pre
fere
nce.
Sho
w a
ll ba
sic
dim
ensi
ons
and
just
est
imat
e th
e di
stan
ces.
Geo
met
ric D
imen
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oler
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ng
A
SME
Y14.
5M-1
994
Page
40
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02
Z
X
Y
1.18
0.39
0.69
0.49
0.28
X
0.39
2.76
380
70
12.5
10
10
17.530
7
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
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Y14.
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994
Page
41
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02
152
24
74
0
0
74
24
120
128
96
6450
24
2020
6450
24
Ø 38.5 - 40.0
C B A Ø 0.4M
B
C
28A
Understanding Datum ReferenceFrame Application (DRF)Example 1
A Ø 0.12
Y
X
Y
Z
Degrees of Freedom MatrixRxRyRzTxTyTz
DatumFeatures
Geo
met
ric D
imen
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ing
& T
oler
anci
ng
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SME
Y14.
5M-1
994
Page
42
of 1
02
152
24
74
120
128
74
24
120
128
96
6450
24
2020
6450
24
Ø 38.5 - 40.0
B
C
28A
Understanding Datum ReferenceFrame Application (DRF)Example 2
A B C Ø 0.4MA Ø 0.12
Y
X
Y
Z
Degrees of Freedom MatrixRxRyRzTxTyTz
DatumFeatures
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
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SME
Y14.
5M-1
994
Page
43
of 1
02
24
7446 74
24
46
2424
B
C
A
Understanding Datum ReferenceFrame Application (DRF)Example 3
Ø 19.0 - 19.3B D A Ø 0.25M
Y
X
Y
Z
DMB A
What effect does the MMC Modifierhave in this second FCF arrangement?
D
5050
Ø 38.5 - 40.0C B A Ø 0.4M
A Ø 0.12
RxRyRzTxTyTzDatumFeatures
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
44
of 1
02
48
7446 74
48
46
2424
B
C
A
Understanding Datum ReferenceFrame Application (DRF)Example 4
Y
X
Y
Z
E
Ø 0.98 22.2 - 22.5
A E D Ø 0.25M1.
2.
3.
EMA D
EMA DM
5050
D
Ø 38.5 - 40.0C B A Ø 0.4M
A Ø 0.12
Ø 19.0 - 19.3B D A Ø 0.25M
RxRyRzTxTyTzDatumFeatures
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
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994
Page
45
of 1
02
48
7446 74
48
46
25.56 24
B
C
A
Understanding Datum ReferenceFrame Application (DRF)Example 5
Y
X
Y
Z
G
5050
Ø 0.98 22.2 - 22.5
B D A Ø 0.25M
D
Ø 38.5 - 40.0C B A Ø 0.4M
A Ø 0.12
Ø 19.0 - 19.3B D A Ø 0.25MD - G
Degrees of Freedom Matrix
Features
Geo
met
ric D
imen
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ing
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oler
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ng
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SME
Y14.
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994
Page
46
of 1
02
4. F
orm
Tol
eran
ce
4.1.
Str
aigh
tnes
s
Line
Ele
men
t – P
lane
Sur
face
0.05
0.1
ON
TH
E D
RA
WIN
G
ME
AN
ING
0.1
Tole
ranc
e0.
05 T
oler
ance
Each
long
itudi
nal e
lem
ent o
f the
surf
ace
mus
t lie
be
twee
n tw
o pa
ralle
l lin
es 0
.05
apar
t in
the
left
view
an
d 0.
1 in
the
right
vie
w o
f the
dra
win
g.
Geo
met
ric D
imen
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oler
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ng
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994
Page
47
of 1
02
Line
Ele
men
t – C
ylin
der
Axi
s at
Reg
ardl
ess
of F
eatu
re S
ize
(RFS
)
The
deriv
ed m
edia
n lin
e of
the
feat
ure’
s act
ual l
ocal
size
mus
t lie
with
in a
cyl
indr
ical
tole
ranc
e zo
ne o
f 0.0
4 di
amet
er, r
egar
dles
s of t
he fe
atur
e si
ze.
Each
circ
ular
ele
men
t of t
he su
rfac
e m
ust b
e w
ithin
the
spec
ified
lim
its o
f siz
e.
ON
TH
E D
RA
WIN
G
ME
AN
ING
0.02
wid
e to
lera
nce
zone
0.02
wid
e to
lera
nce
zone
0.02
wid
e to
lera
nce
zone
n16.00
MMC
n16.00 MMC
n16.00 MMC
(a)
(b)
(c)
n16
.00
15.8
9
0.02
Each
long
itudi
nal e
lem
ent o
f the
surf
ace
mus
t lie
be
twee
n tw
o pa
ralle
l lin
es 0
.02
apar
t whe
re th
e tw
o lin
es a
nd th
e no
min
al a
xis o
f the
par
t sha
re a
sp
ecifi
ed li
mits
of s
ize
and
the
boun
dary
of
perf
ect f
orm
at M
MC
16.
00
Not
e: W
aist
ing
(b) o
r bar
relin
g (c
) of t
he su
rfac
e,
thou
gh w
ithin
the
stra
ight
ness
tole
ranc
e, m
ust
not e
xcee
d th
e lim
its o
f siz
e of
the
feat
ure
ON
TH
E D
RAW
ING
MEA
NIN
G
n16.00
0.04
dia
met
er to
lera
nce
zone
n16.04
oute
r bou
ndar
y
n0.04
n16
.00
15.8
9
Geo
met
ric D
imen
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oler
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48
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02
Axi
s at
Max
imum
Mat
eria
l Con
ditio
n (M
MC
) Ac
cept
ance
Bou
ndar
y
ON
TH
E D
RAW
ING
n16.04
Virtu
al C
ondi
tion
MEA
NIN
G Feat
ure
Dia
met
er to
lera
nce
Size
zone
allo
wed
16.0
00.
0415
.99
0.05
15.9
80.
06
15.9
00.
1415
.89
0.15
n0.04m
n16
.00
15.8
9
The
deriv
ed m
edia
n lin
e of
the
feat
ure’
s act
ual l
ocal
size
m
ust l
ie w
ithin
a c
ylin
dric
al to
lera
nce
zone
of 0
.04
diam
eter
at M
MC
. A
s eac
h ac
tual
loca
l siz
e de
parts
fr
om M
MC
, an
incr
ease
in th
e lo
cal d
iam
eter
of t
he
tole
ranc
e cy
linde
r is a
llow
ed w
hich
is e
qual
to th
e am
ount
of s
uch
depa
rture
. Ea
ch c
ircul
ar e
lem
ent o
f the
su
rfac
e m
ust b
e w
ithin
the
spec
ified
lim
its o
f siz
e. n
16.00
n16.00
n16.04
n16.04
n0.04
n16.04
n15.89
n0.15
• Th
e m
axim
um d
iam
eter
of t
he p
in w
ith
perf
ect f
orm
is sh
own
in a
gag
e w
ith a
16
.04
diam
eter
hol
e.
• W
ith th
e pi
n at
max
imum
dia
met
er 1
6.00
, th
e ga
ge w
ill a
ccep
t the
pin
with
up
to
0.04
var
iatio
n in
stra
ight
ness
. •
With
the
pin
at m
inim
um d
iam
eter
15.
89,
the
gage
will
acc
ept t
he p
in w
ith u
p to
0.
15 v
aria
tion
in st
raig
htne
ss.
Geo
met
ric D
imen
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oler
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ng
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Page
49
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02
Per U
nit L
engt
h 4.
2. F
latn
ess
ON
TH
E D
RAW
ING
MEA
NIN
G
n16
.00
15.8
9
100
n0.
4n
0.1/
25
100
25
n16
.04
oute
r bou
ndar
y
n15
.89-
16.0
0
n16
.04
tole
ranc
e zo
ne
n0.
1 to
lera
nce
zone
in e
ach
25m
m o
f len
gth
The
deriv
ed m
edia
n lin
e of
th
e fe
atur
e’s a
ctua
l loc
al si
ze
mus
t lie
with
in a
cyl
indr
ical
to
lera
nce
zone
of n
0.4
for t
he
tota
l 100
mm
of l
engt
h an
d w
ithin
a 0
.1 c
ylin
dric
al
tole
ranc
e zo
ne fo
r any
25m
m
leng
th, r
egar
dles
s of f
eatu
re
size
. Ea
ch c
ircul
ar e
lem
ent o
f th
e su
rfac
e m
ust b
e w
ithin
the
spec
ified
lim
its o
f siz
e.
0.25
wid
e to
lera
nce
zone
0.25
ON
TH
E D
RA
WIN
GM
EA
NIN
G
The
surf
ace
mus
t lie
bet
wee
n tw
o pa
ralle
l pla
nes 0
.25
apar
t. T
he
surf
ace
mus
t be
with
in th
e sp
ecifi
ed li
mits
of s
ize.
Geo
met
ric D
imen
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oler
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ng
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Page
50
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02
4.3.
Circ
ular
ity (R
ound
ness
) 4.
4. C
ylin
dric
ity
ON
TH
E D
RAW
ING
MEA
NIN
G
A A
0.25
wid
e to
lera
nce
zone
SEC
TIO
N A
-A
900.
25
ON
THE
DR
AWIN
GM
EAN
INGSE
CTI
ON
A-A
0.25
wid
e to
lera
nce
zone
0.25
Sn19
.2+0
.5
A A
Each
circ
ular
ele
men
t of t
he su
rfac
e in
a p
lane
per
pend
icul
ar to
an
axis
mus
t lie
bet
wee
n tw
o co
ncen
tric
circ
les,
one
havi
ng a
radi
us 0
.25
larg
er th
an th
e ot
her.
Eac
h ci
rcul
ar e
lem
ent o
f the
su
rfac
e m
ust b
e w
ithin
the
spec
ified
lim
its o
f siz
e.
Each
circ
ular
ele
men
t of t
he
surf
ace
in a
pla
ne p
assi
ng
thro
ugh
a co
mm
on c
ente
r mus
t lie
bet
wee
n tw
o co
ncen
tric
circ
les,
one
havi
ng a
radi
us 0
.25
larg
er th
an th
e ot
her.
Eac
h ci
rcul
ar e
lem
ent o
f the
surf
ace
mus
t be
with
in th
e sp
ecifi
ed
limits
of s
ize.
MEA
NIN
G
0.25
wid
e to
lera
nce
zone
ON
TH
E D
RAW
ING
n25
.0+0
.5 0.25
The
cylin
dric
al su
rfac
e m
ust l
ie b
etw
een
two
conc
entri
c cy
linde
rs, o
ne h
avin
g a
radi
us 0
.25
larg
er th
an
the
othe
r. T
he su
rfac
e m
ust b
e w
ithin
the
spec
ified
lim
its o
f siz
e.
Geo
met
ric D
imen
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oler
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ng
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Page
51
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02
4.5.
Exe
rcis
e 1.
O
n Fi
gure
1(a
), in
dica
te c
ontr
ol o
f el
emen
t st
raig
htne
ss b
y us
e of
Rul
e #1
so
that
m
axim
um p
ossi
ble
erro
r is
no m
ore
than
mm
if th
e fe
atur
e m
axim
um s
ize
is ∅
16m
m.
2.
On
Figu
re 1
(b),
indi
cate
an
elem
ent s
trai
ghtn
ess m
axim
um o
f 0.0
12m
m.
3.
Wha
t is
the
circ
ular
ity (r
ound
ness
) of t
his
pin?
___
____
____
____
____
____
____
4.
On
Figu
re 1
(c),
indi
cate
tha
t ax
is s
trai
ghtn
ess
may
vio
late
Rul
e #1
and
allo
w a
tot
al
bend
of u
p to
0.4
mm
. 5.
O
n Fi
gure
1(d
), as
sum
e th
at th
e pi
n w
ill a
ssem
ble
with
the
hole
sho
wn
in 1
(e).
The
cond
ition
of
____
____
____
__ i
s of
ten
desi
red.
In
dica
te t
his
with
a s
trai
ghtn
ess
tole
ranc
e of
0.4
mm
.
6.
Wha
t is
the
cylin
dric
ity o
f thi
s pi
n? _
____
____
____
____
__
7.
Wha
t is t
he V
irtu
al C
ondi
tion
of th
e pi
n fo
r the
requ
irem
ent o
f que
stio
n 5?
___
__
8.
On
Figu
re 2
, ind
icat
e on
the
bot
tom
sur
face
a c
ontr
ol t
hat
requ
ires
all
elem
ents
and
po
ints
rela
tive
to e
ach
othe
r be
with
in a
tole
ranc
e zo
ne th
at is
two
plan
es
whi
ch a
re 0
.05m
m a
part
. Th
is c
ontr
ol w
ould
be
calle
d __
____
____
____
____
__
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imen
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02
Ø 1
6.00
- 15
.97
Ø 1
6.00
- 15
.97
Ø 1
6.0
- 15.
9
Ø (Virt
ual C
ondi
tion)
Figu
re 1
(d)
(a)
(b)
(c)
(e)
Geo
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ric D
imen
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oler
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ng
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02
30 30 °
4545
± 0
.445
18 ±
0.4
110.
0011
0 ±
0.6
4540
± 0
.445
20 ±
0.4
28 °
Ø 1
2+
0.1
- 0
MAI
N V
IEW
Figu
re 2
Geo
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ric D
imen
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oler
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ng
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02
5. O
rient
atio
n To
lera
nce
5.1.
Par
alle
lism
Surf
ace
Plan
e
Th
e su
rfac
e m
ust l
ie b
etw
een
two
para
llel p
lane
s 0.1
2 ap
art w
hich
are
par
alle
l to
datu
m p
lane
A.
The
surf
ace
mus
t be
with
in th
e sp
ecifi
ed li
mits
of s
ize.
Axi
s re
late
d to
a S
urfa
ce P
lane
Reg
ardl
ess o
f fea
ture
size
, the
feat
ure
axis
mus
t lie
bet
wee
n tw
o pa
ralle
l pla
nes 0
.12
apar
t whi
ch
are
para
llel t
o da
tum
pla
ne A
. Th
e fe
atur
e ax
is m
ust b
e w
ithin
the
spec
ified
tole
ranc
e of
loca
tion.
Wha
t wou
ld b
e th
e re
sult
if a
diam
eter
sym
bol w
as a
dded
to th
e ca
llout
?
AØ
0.1
2
MEA
NIN
GO
N T
HE
DR
AWIN
G
0.12
Af
A
Poss
ible
orie
ntat
ion
of th
e su
rface
0.12
wid
e to
lera
nce
zone
Dat
umPl
ane
A
MEA
NIN
GO
N T
HE
DR
AWIN
G
0.12
Af
A
0.12
wid
e to
lera
nce
zone
Dat
um P
lane
A
Poss
ible
orie
ntat
ion
of fe
atur
e ax
is
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ric D
imen
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02
Axi
s re
late
d to
ano
ther
Axi
s at
Reg
ardl
ess
of F
eatu
re S
ize
(RFS
)
R
egar
dles
s of f
eatu
re si
ze, t
he fe
atur
e ax
is m
ust l
ie w
ithin
a 0
.2 d
iam
eter
cyl
indr
ical
zon
e pa
ralle
l to
datu
m a
xis A
. Th
e fe
atur
e ax
is m
ust b
e w
ithin
the
spec
ified
tole
ranc
e of
loca
tion.
Axi
s re
late
d to
ano
ther
Axi
s at
Max
imum
Mat
eria
l Con
ditio
n (M
MC
)
Whe
re th
e fe
atur
e is
at m
axim
um m
ater
ial c
ondi
tion
(10.
000)
, the
max
imum
par
alle
lism
tole
ranc
e is
n0.
050.
Whe
re th
e fe
atur
e de
parts
from
its M
MC
size
, an
incr
ease
in th
e pa
ralle
lism
tole
ranc
e is
al
low
ed w
hich
is e
qual
to th
e am
ount
of s
uch
depa
rture
. Th
e fe
atur
e ax
is m
ust b
e w
ithin
the
spec
ified
tole
ranc
e of
loca
tion.
n0.2
Af
A
n0.
2to
lera
nce
zone
Poss
ible
orie
ntat
ion
of fe
atur
e ax
is
Dat
um A
xis
A
MEA
NIN
GO
N T
HE
DR
AWIN
G
n0.05m
Af
A
Poss
ible
orie
ntat
ion
offe
atur
e ax
is
Dat
um A
xis
A
MEA
NIN
GO
N T
HE
DR
AWIN
G
10.022
10.000
n
Feat
ure
Dia
met
er to
lera
nce
Size
zone
allo
wed
10.0
000.
050
10.0
010.
051
10.0
020.
052
10.0
210.
071
10.0
220.
072
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imen
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5.2.
Per
pend
icul
arity
Surf
ace
Plan
e
Th
e su
rfac
e m
ust l
ie b
etw
een
two
para
llel p
lane
s 0.1
2 ap
art w
hich
are
per
pend
icul
ar to
dat
um p
lane
A
. Th
e su
rfac
e m
ust b
e w
ithin
the
spec
ified
lim
its o
f siz
e.
Cen
ter P
lane
R
egar
dles
s of f
eatu
re si
ze, t
he fe
atur
e ce
nter
pla
ne m
ust l
ie b
etw
een
two
para
llel p
lane
s 0.1
2 ap
art
whi
ch a
re p
erpe
ndic
ular
to d
atum
pla
ne A
. Th
e fe
atur
e ce
nter
pla
ne m
ust b
e w
ithin
the
spec
ified
to
lera
nce
of lo
catio
n.
MEA
NIN
GO
N T
HE
DR
AWIN
G
A
Poss
ible
orie
ntat
ion
of th
esu
rface
0.12
wid
e to
lera
nce
zone
Dat
um P
lane
A
0.12
Ab
MEA
NIN
GO
N T
HE
DR
AWIN
GPo
ssib
le o
rient
atio
n of
the
feat
ure
cent
er p
lane
0.12
wid
eto
lera
nce
zone Dat
um P
lane
A
0.12A b
A
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imen
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oler
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02
Axi
s to
Axi
s R
egar
dles
s of f
eatu
re si
ze, t
he fe
atur
e ax
is m
ust l
ie b
etw
een
two
para
llel p
lane
s 0.2
apa
rt w
hich
are
pe
rpen
dicu
lar t
o da
tum
axi
s A.
The
feat
ure
axis
mus
t be
with
in th
e sp
ecifi
ed to
lera
nce
of lo
catio
n.
Not
e: T
his a
pplie
s onl
y to
the
view
on
whi
ch it
is sp
ecifi
ed.
Axi
s to
Pla
ne (R
FS)
Reg
ardl
ess o
f fea
ture
size
, the
feat
ure
axis
mus
t lie
with
in a
cyl
indr
ical
zon
e 0.
4 di
amet
er w
hich
is
perp
endi
cula
r to
and
proj
ects
from
dat
um p
lane
A fo
r the
feat
ure
heig
ht.
The
feat
ure
axis
mus
t be
with
in th
e sp
ecifi
ed to
lera
nce
of lo
catio
n.
MEA
NIN
GO
N T
HE
DR
AWIN
G
0.2
Ab
A
0.2
wid
eto
lera
nce
zone
Dat
um A
xis
A
Poss
ible
orie
ntat
ion
of fe
atur
e ax
is
MEA
NIN
GO
N T
HE
DR
AWIN
G
n0.
4A
b
A
0.4
diam
eter
tole
ranc
e zo
ne
Dat
um P
lane
A
Poss
ible
orie
ntat
ion
of fe
atur
e ax
is
25+0.5
FeatureHeight
Geo
met
ric D
imen
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oler
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ng
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02
Axi
s to
Pla
ne (M
MC
) W
here
the
feat
ure
is a
t max
imum
mat
eria
l con
ditio
n (1
5.98
4), t
he m
axim
um p
erpe
ndic
ular
ity
tole
ranc
e is
n0.
050.
Whe
re th
e fe
atur
e de
parts
from
its M
MC
size
, an
incr
ease
in th
e pe
rpen
dicu
larit
y to
lera
nce
is a
llow
ed w
hich
is e
qual
to th
e am
ount
of s
uch
depa
rture
. Th
e fe
atur
e ax
is m
ust b
e w
ithin
the
spec
ified
tole
ranc
e of
loca
tion.
(A
)The
max
imum
dia
met
er p
in w
ith p
erfe
ct o
rient
atio
n is
show
n in
a g
age
with
a 1
6.03
4 di
amet
er
hole
. (B
)With
the
pin
at m
axim
um d
iam
eter
(15.
984)
, the
gag
e w
ill a
ccep
t the
par
t with
up
to 0
.05
varia
tion
in p
erpe
ndic
ular
ity.
(C)T
he p
in is
at m
inim
um d
iam
eter
(15.
966)
, and
the
varia
tion
in p
erpe
ndic
ular
ity m
ay in
crea
se to
0.
068
and
the
part
will
be
acce
ptab
le.
MEA
NIN
G
ON
TH
E D
RAW
ING
AD
atum
Pla
ne A
Poss
ible
orie
ntat
ion
offe
atur
e ax
is
25+0.5
FeatureHeight
n0.
05m
Ab
15.984
15.966
n
Feat
ure
Dia
met
er to
lera
nce
Size
zone
allo
wed
15.9
840.
050
15.9
830.
051
15.9
820.
052
15.9
760.
067
15.9
660.
068
Dat
umPl
ane
A
ACC
EPTA
NC
E B
OU
ND
AY
n16.034
n16.034
n16.034
n0.050
n15.984
n0.068
n15.966
n15.984
(A)
(B)
(C)
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imen
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02
5.3.
Ang
ular
ity
Surf
ace
Plan
e
Th
e su
rfac
e m
ust l
ie b
etw
een
two
para
llel p
lane
s 0.4
apa
rt w
hich
are
incl
ined
at 3
0o to
dat
um p
lane
A
. Th
e su
rfac
e m
ust b
e w
ithin
the
spec
ified
lim
its o
f siz
e.
Axi
s to
Sur
face
Pla
ne
Reg
ardl
ess o
f fea
ture
size
, the
feat
ure
axis
mus
t lie
bet
wee
n tw
o pa
ralle
l pla
nes 0
.2 a
part
whi
ch a
re
incl
ined
60o
to d
atum
pla
ne A
. Th
e fe
atur
e ax
is m
ust b
e w
ithin
the
spec
ified
tole
ranc
e of
loca
tion.
ON
TH
E D
RAW
ING
AD
atum
Pla
ne A
Poss
ible
orie
ntat
ion
ofac
tual
sur
face
0.4
wid
e to
lera
nce
zone
30o
0.4
Aa
30o
MEA
NIN
G
MEA
NIN
G
ON
TH
E D
RAW
ING
0.2
wid
eto
lera
nce
zone
Dat
um P
lane
A
Poss
ible
orie
ntat
ion
of fe
atur
e ax
is
60o
60o
n16
0.2
Aa
A
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ric D
imen
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oler
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02
Reg
ardl
ess o
f fea
ture
size
, the
feat
ure
axis
mus
t lie
with
in a
0.2
dia
met
er c
ylin
dric
al z
one
incl
ined
60
o to
dat
um p
lane
A.
The
feat
ure
axis
mus
t be
with
in th
e sp
ecifi
ed to
lera
nce
of lo
catio
n.
5.4.
Use
of T
ange
nt P
lane
Sym
bol
A p
lane
con
tact
ing
the
high
poi
nts o
f the
surf
ace
shal
l lie
with
in tw
o pa
ralle
l pla
nes 0
.1 a
part.
The
su
rfac
e m
ust b
e w
ithin
the
spec
ified
lim
its o
f siz
e.
MEA
NIN
GO
N T
HE
DR
AW
ING
A0.
1 w
ide
tole
ranc
e zo
ne
Tang
ent P
lane
0.1
TA
f
50.0+.05
MEA
NIN
G
ON
TH
E D
RAW
ING
n0.
2 to
lera
nce
zone
Dat
um P
lane
A
Poss
ible
orie
ntat
ion
of fe
atur
e ax
is
60o
60o
n16n
0.2
Aa
B
AB
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imen
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02
5.5.
Use
of Z
ero
Tole
ranc
e at
MM
C
Whe
re th
e fe
atur
e is
at m
axim
um m
ater
ial c
ondi
tion
(50.
00),
its a
xis m
ust b
e pe
rpen
dicu
lar t
o da
tum
pla
ne A
. W
here
the
feat
ure
depa
rts fr
om it
s MM
C si
ze, a
per
pend
icul
arity
tole
ranc
e is
al
low
ed w
hich
is e
qual
to th
e am
ount
of s
uch
depa
rture
. Th
e fe
atur
e ax
is m
ust b
e w
ithin
the
spec
ified
tole
ranc
e of
loca
tion.
Whe
re th
e fe
atur
e is
at m
axim
um m
ater
ial c
ondi
tion
(50.
00),
its a
xis m
ust b
e pe
rpen
dicu
lar t
o da
tum
pla
ne A
. W
here
the
feat
ure
depa
rts fr
om it
s MM
C si
ze, a
per
pend
icul
arity
tole
ranc
e is
al
low
ed w
hich
is e
qual
to th
e am
ount
of s
uch
depa
rture
, up
to th
e 0.
1 m
axim
um.
The
feat
ure
axis
m
ust b
e w
ithin
the
spec
ified
tole
ranc
e of
loca
tion.
MEA
NIN
G
ON
TH
E D
RA
WIN
G
AD
atum
Plan
e A
Poss
ible
orie
ntat
ion
of fe
atur
e ax
is
Feat
ure
Dia
met
er to
lera
nce
Size
zone
allo
wed
50.0
00.
0050
.01
0.01
50.0
20.
02
50.1
00.
10
50.1
60.
10
50.16
50.00
n b n
0 m n
0.1
MA
X A
MEA
NIN
G
ON
TH
E D
RA
WIN
G
AD
atum
Plan
e A
Poss
ible
orie
ntat
ion
of fe
atur
e ax
is
Feat
ure
Dia
met
er to
lera
nce
Size
zone
allo
wed
50.0
00.
0050
.01
0.01
50.0
20.
02
50.1
50.
1550
.16
0.16
b n
0 m
A
50.16
50.00
n
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imen
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02
5.6.
Exe
rcis
e 1.
O
n Fi
gure
2, i
ndic
ate
that
the
righ
t ver
tical
sur
face
in th
e m
ain
view
is to
be
squa
re to
th
e lo
wer
surf
ace
with
in 0
.08m
m.
2.
Show
bel
ow (s
ketc
h) h
ow th
e to
lera
nce
zone
is e
stab
lishe
d fo
r the
requ
irem
ent o
f qu
estio
n 1.
3.
W
orki
ng o
n Fi
gure
2, i
ndic
ate
that
the
righ
t ver
tical
sur
face
is to
be
squa
re w
ith th
e fr
ont s
urfa
ce w
ithin
0.0
8mm
. 4.
A
ssum
e th
at in
Fig
ure
2, th
e ∅
12m
m h
ole
has b
een
loca
ted
with
pos
ition
dim
ensi
ons
and
tole
ranc
e. A
dd a
n or
ient
atio
n to
lera
nce
to c
ontr
ol th
e re
latio
nshi
p of
the
hole
to
the
botto
m s
urfa
ce w
ithin
∅0.
08m
m to
tal.
5.
Sket
ch h
ow th
e to
lera
nce
zone
is e
stab
lishe
d fo
r the
requ
irem
ent o
f que
stio
n 4.
6.
W
hat i
s th
e to
tal p
erm
issi
ble
perp
endi
cula
rity
if th
e ho
le s
ize
is p
rodu
ced
at ∅
12m
m?
____
____
_. I
f the
hol
e is
pro
duce
d at
∅12
.1m
m?
____
____
__
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
63
of 1
02
7.
Supp
ose
the
perp
endi
cula
rity
of t
he p
rodu
ced
feat
ure
was
allo
wed
to in
crea
se a
s th
e si
ze o
f the
feat
ure
incr
ease
d, h
ow w
ould
that
be
indi
cate
d?
8.
Wha
t TH
EN is
the
tota
l per
mis
sibl
e pe
rpen
dicu
lari
ty if
the
hole
siz
e is
pro
duce
d at
∅
12m
m?
____
____
. If
the
hole
is p
rodu
ced
at ∅
12.0
5mm
? __
____
____
. If t
he
hole
is p
rodu
ced
at ∅
12.1
mm
? __
____
____
_.
9.
On
Figu
re 2
, ind
icat
e re
quir
emen
ts to
con
trol
the
angl
es w
ithin
a to
tal t
oler
ance
of
0.1m
m.
10. S
ketc
h ho
w th
e to
lera
nce
zone
is e
stab
lishe
d fo
r the
30°
ang
le.
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
64
of 1
02
30 30 °
4545
± 0
.445
18 ±
0.4
110.
0011
0 ±
0.6
4540
± 0
.445
20 ±
0.4
28 °
Ø 1
2+
0.1
- 0
MAI
N V
IEW
Figu
re 2
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
65
of 1
02
6. P
rofil
e To
lera
nce
6.1.
Bila
tera
l & U
nila
tera
l
MEA
NIN
G
ON
TH
E D
RA
WIN
G A
0.8
wid
e to
lera
nce
zone
equ
ally
disp
osed
abo
ut th
e tru
e pr
ofile
(0.4
eac
h si
de)
Dat
um P
lane
A
ON
TH
E D
RA
WIN
G
MEA
NIN
G
Dat
um P
lane
A
A
0.8
Ad
0.8
Ad
Actu
al p
rofil
e
True
pro
file
rela
tive
to D
atum
Pla
ne A
0.8
wid
e to
lera
nce
zone
ent
irely
disp
osed
on
one
side
of t
he tr
uepr
ofile
as
indi
cate
d
Actu
al p
rofil
e
True
pro
file
rela
tive
to D
atum
Pla
ne A
(A) B
ilate
ral T
oler
ance
(B) U
nila
tera
l Tol
eran
ce (I
nsid
e)
MEA
NIN
G
ON
TH
E D
RA
WIN
G
A
0.8
wid
e to
lera
nce
zone
ent
irely
disp
osed
on
one
side
of t
he tr
uepr
ofile
as
indi
cate
d
Dat
um P
lane
A
ON
TH
E D
RA
WIN
G
MEA
NIN
G
Dat
um P
lane
A
A
0.8
Ad
0.8
Ad
Actu
al p
rofil
e
True
pro
file
rela
tive
to D
atum
Pla
ne A
0.8
wid
e to
lera
nce
zone
uneq
ually
dis
pose
d on
one
sid
eof
the
true
prof
ile a
s in
dica
ted
Actu
al p
rofil
e
True
pro
file
rela
tive
to D
atum
Pla
ne A
(C) U
nila
tera
l Tol
eran
ce (O
utsi
de)
(D) B
ilate
ral T
oler
ance
une
qual
dis
trib
utio
n
0.6
0.2
Prof
ile o
f a L
ine k
Prof
ile o
f a S
urfa
ce
d
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
66
of 1
02
Th
e su
rfac
e be
twee
n po
ints
D a
nd E
mus
t lie
bet
wee
n tw
o pr
ofile
bou
ndar
ies 0
.25
apar
t, pe
rpen
dicu
lar t
o da
tum
pla
ne A
, equ
ally
dis
pose
d ab
out t
he tr
ue p
rofil
e an
d po
sitio
ned
with
resp
ect
to d
atum
pla
nes B
and
C.
MEA
NIN
G
ON
TH
E D
RA
WIN
G
0.25
wid
e to
lera
nce
zone
Dat
um P
lane
CD
atum
Pla
ne A
Dat
umPl
ane
B
D
E
19.8
DE
A
0.25
A B
C
d
21.7
21.4
2323
.423
17.5
7X 7
17.5
8+0.
0549
+0.1
2
C
65+0
.25
A
8+0.
12
2X 8.6+0.12
DE
90o
ER
80 78.8
7
R8
R82
75o
10
0.12
E F
d
0.1
E F
d
0.05
E F
d
A
B
C
D
B
C
R12
8+0.
1
F
D
C
A
B
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
67
of 1
02
26 ±
0.0
412
18
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
68
of 1
02
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
69
of 1
02
6.2.
Exe
rcis
e
7040
60
35
C
B
A
7040
35
60
CB
A0.
3
CB
A0.
09
H
L
L
K
Surfa
ce Y
Surfa
ce Z
H
L
KD
ista
nce
VD
ista
nce
W
Dis
tanc
e X
1.
On
the
part
show
n ab
ove,
wha
t is t
he m
inim
um a
nd m
axim
um o
f the
follo
win
g di
stan
ces
in re
latio
n to
the
datu
m re
fere
nce
fram
e, a
s al
low
ed b
y th
e pr
ofile
cal
lout
?
(a)
Dis
tanc
e V
: M
inim
um _
____
____
____
___
Max
imum
___
____
____
____
_
(b) D
ista
nce
W:
Min
imum
___
____
____
____
_ M
axim
um _
____
____
____
___
(c)
Dis
tanc
e X:
M
inim
um _
____
____
____
___
Max
imum
___
____
____
____
_
2.
On
the
sam
e pa
rt, c
onsi
deri
ng th
e ap
plic
able
pro
file
callo
uts,
wha
t is
the
max
imum
pe
rpen
dicu
lari
ty o
f the
follo
win
g su
rfac
es in
rela
tion
to D
atum
A?
(a
) Su
rfac
e Y:
_
____
____
____
___
(b) S
urfa
ce Z
W:
____
____
____
____
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
70
of 1
02
3.
Prof
ile o
f a S
urfa
ce c
an a
lso
be u
sed
with
a s
ize
tole
ranc
e to
refin
e th
e si
ze o
r sha
pe.
Follo
win
g is
an
exam
ple
whe
re th
e th
ree
top
surf
aces
are
to b
e co
plan
ar (i
n-lin
e)
with
in 0
.3m
m a
nd in
rela
tion
to th
e bo
ttom
sur
face
of t
he p
art.
Eac
h su
rfac
e is
to fl
at
with
in 0
.1m
m.
Def
ine
thes
e re
quir
emen
ts o
n th
e dr
awin
g.
4040
± 0
.3
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
71
of 1
02
160
Unless Otherwise Specified:Tolerance ± 0.05Angles ± 1°
± 0.5
30.00± 0.5
12
30.00± 0.5
12
1020
5020
20
20
90
130
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
72
of 1
02
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
73
of 1
02
160
Unless Otherwise Specified:Tolerance ± 0.05Angles ± 1°
3018
3018
1020
5020
20
20
90
130
B
C
20A
Z
X
Y20
3018
3018
1020
20
20
50
90
13020
10 10
202020202020202020202020 2020
± 0.5
C B A 0.05
Z Y X 0.05G
eom
etric
Dim
ensi
onin
g &
Tol
eran
cing
ASM
E Y1
4.5M
-199
4
Page
74
of 1
02
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
75
of 1
02
7. R
unou
t Tol
eran
ce
7.1.
Coa
xial
Fea
ture
s Th
ere
are
thre
e ty
pes
of c
oaxi
al fe
atur
e co
ntro
l. P
rope
r sel
ectio
n is
bas
ed u
pon
whi
ch o
f th
e be
low
con
trols
bes
t sui
ts th
e fu
nctio
nal d
esig
n re
quire
men
t.
Run
out
- Use
whe
re p
art f
eatu
re s
urfa
ces
in a
rota
tiona
l con
side
ratio
n m
ust r
elat
e to
a
datu
m a
xis.
Run
out i
s ap
plic
able
onl
y on
an
RFS
bas
is.
Run
out
h 0.5 A
Tota
l Run
out
t 0.5 A
(S
urfa
ce to
axi
s co
ntro
l, R
FS)
Po
sitio
n - U
se w
here
par
t fea
ture
sur
face
s re
late
to a
dat
um a
xis
on a
func
tiona
l or
inte
r-cha
ngea
bilit
y ba
sis;
typi
cally
mat
ing
parts
are
invo
lved
. Po
sitio
n is
nor
mal
ly
appl
ied
only
on
an M
MC
bas
is (o
ccas
iona
lly a
n R
FS d
atum
is u
sed)
.
j n0.5m
Am
(A
xis
to a
xis
cont
rol,
MM
C)
C
once
ntric
ity -
Use
whe
re p
art f
eatu
re a
xis
/ axe
s in
a ro
tatio
nal c
onsi
dera
tion
mus
t re
late
to a
dat
um a
xis.
Con
cent
ricity
is a
pplic
able
onl
y on
an
RFS
bas
is.
r n0.5 A
(Axi
s to
axi
s co
ntro
l, R
FS)
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
76
of 1
02
7.2.
Run
out
Run
out:
Eac
h ci
rcul
ar e
lem
ent o
f the
feat
ure
mus
t be
with
in th
e ru
nout
tole
ranc
e an
d w
ithin
0.0
5 w
ide
tole
ranc
e zo
ne (F
IM) i
n re
latio
n to
dat
um a
xis A
Tot
al R
unou
t: A
ll su
rfac
e el
emen
ts, t
otal
, acr
oss e
ntire
surf
ace
mus
t be
with
in th
e ru
nout
tole
ranc
e an
d w
ithin
0.0
5 w
ide
tole
ranc
e zo
ne (F
IM) i
n re
latio
n to
dat
um a
xis A
.
MEA
NIN
G
ON
TH
E D
RAW
ING
0.05
Ah
A
Dat
um F
eatu
re S
imul
ator
(Col
let)
n 2
0+0.
5n
40+
0.5
Dat
um A
xis
A
Dat
um F
eatu
re A
Sim
ulat
ed D
atum
Fea
ture
A(T
rue
Geo
met
ric C
ount
erpa
rt)
Each
Circ
ular
Ele
men
tIn
divi
dual
lyFI
M 0
.05
Rot
ate
Part
MEA
NIN
G
ON
TH
E D
RAW
ING
0.05
At
A
Dat
um F
eatu
re S
imul
ator
(Col
let)
n 2
0+0.
5n
40+
0.5
Dat
um A
xis
A
Dat
um F
eatu
re A
Sim
ulat
ed D
atum
Fea
ture
A(T
rue
Geo
met
ric C
ount
erpa
rt)
All E
lem
ents
Tog
ethe
rFI
M 0
.05
Rot
ate
Part
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
77
of 1
02
7.3.
Exa
mpl
es
Part
Mou
nted
on
Two
Func
tiona
l Dia
met
ers
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
78
of 1
02
Part
Mou
nted
on
Func
tiona
l Fac
e Su
rfac
e (D
atum
) and
Dia
met
er (D
atum
)
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
79
of 1
02
Part
Mou
nted
on
Two
Func
tiona
l Dia
met
ers
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
80
of 1
02
7.4.
Exe
rcis
e 1.
W
hat i
s the
coa
xial
ity re
quir
emen
t bet
wee
n th
e tw
o di
amet
ers a
s exp
ress
ed o
n th
e
follo
win
g dr
awin
g sk
etch
? __
____
____
____
____
___
2.
O
n th
e sk
etch
, spe
cify
a 0
.12m
m c
ircu
lar r
unou
t req
uire
men
t on
the
larg
e
3.
Afte
r def
inin
g th
e ru
nout
requ
irem
ent,
wha
t is
the
max
imum
cir
cula
rity
(rou
ndne
ss)
for t
he la
rger
dia
met
er? __
____
____
____
____
____
___
4.
With
the
spec
ified
runo
ut re
quir
emen
t, w
hat i
s th
e m
axim
um p
ositi
on o
f the
larg
e
diam
eter
in re
latio
n to
the
smal
l dia
met
er? __
____
____
____
____
__
5.
On
the
sket
ch, s
peci
fy a
runo
ut re
quir
emen
t to
mak
e th
e le
ft fa
ce p
erpe
ndic
ular
to th
e D
atum
axi
s w
ithin
0.1
mm
tota
l. 6.
O
n th
e fig
ure
belo
w, s
ketc
h ho
w th
e tw
o ru
nout
requ
irem
ents
wou
ld b
e ve
rifie
d.
n20+0.05
n6+
0.02
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
81
of 1
02
7.
On
the
part
dra
win
g be
low
, spe
cify
a 0
.12m
m to
tal r
unou
t rel
atin
g th
e la
rge
diam
eter
to
bot
h of
the
two
smal
l dia
met
ers
toge
ther
.
8.
O
n th
e fig
ure
belo
w, s
ketc
h ho
w th
e ru
nout
requ
irem
ent w
ould
be
veri
fied.
9.
Can
runo
ut b
e us
ed w
ithou
t a d
atum
feat
ure
refe
renc
e?__
____
____
____
____
__
10. C
an th
e m o
r l m
odifi
ers
be u
sed
with
runo
ut?
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
_
11. W
hat i
s the
mai
n di
ffere
nce
betw
een
circ
ular
and
tota
l run
out?
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
_
12. W
hat i
s th
e m
ain
diffe
renc
e be
twee
n ru
nout
and
con
cent
rici
ty?
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
_
13. W
hat i
s th
e m
ain
diffe
renc
e be
twee
n co
ncen
tric
ity a
nd p
ositi
on?
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
____
_
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
82
of 1
02
24
80
24
20
10
70
40
9060
20
A
D
C
Ø 25
Ø 80
Ø 20
Ø 10
Ø 25
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
83
of 1
02
8. L
ocat
ion
Tole
ranc
e
8.1.
Pos
ition
Hol
e Ve
rific
atio
n R
emem
ber t
hat a
ll fe
atur
es h
ave
dept
h. T
here
fore
, whe
n do
ing
desi
gn o
r mak
ing
mea
sure
men
ts, t
he to
lera
nce
zone
mus
t be
cons
ider
ed fr
om o
ne e
nd o
f the
zon
e to
the
othe
r.
Posi
tion
vs. P
lus/
Min
us
Coo
rdin
ate
Tole
ranc
ing
52
96 4
X Ø
16.
7 - 1
7.3
Tole
ranc
e ±
0.5
0.7
0.5
0.5
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
84
of 1
02
Po
sitio
n To
lera
ncin
g (R
ound
zon
e)
♦
Each
hol
e ha
s its
ow
n po
sitio
nal t
oler
ance
zon
e. T
he z
one
size
is
depe
nden
t on
the
size
of t
he p
rodu
ced
hole
. ♦
W
hen
the
hole
is p
rodu
ced
at it
s M
MC
siz
e, th
e po
sitio
nal t
oler
ance
zon
e is
the
tole
ranc
e st
ated
in th
e FC
F.
♦
If th
e ho
le is
pro
duce
d at
som
ethi
ng la
rger
than
the
MM
C s
ize,
the
posi
tiona
l tol
eran
ce z
one
is s
tate
d FC
F to
lera
nce
PLU
S th
e am
ount
that
th
e ho
le is
larg
er th
an M
MC
.
Exam
ple
Feat
ures
: If
Hol
e #
1 =
∅ 1
6.7
Then
tole
ranc
e zo
ne
=
#2 =
∅ 1
6.9
tole
ranc
e zo
ne
=
#3 =
∅ 1
7.2
tole
ranc
e zo
ne
=
#4 =
∅ 1
7.4
tole
ranc
e zo
ne
=
A
52
96
4X
Ø 1
6.7
- 17.
3
52
96
1.3
0.7
AØ
0.7
M
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
85
of 1
02
Posi
tion
Zone
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
86
of 1
02
Basi
c D
imen
sion
(from
dra
win
g)
Actu
al M
easu
rem
ent
(from
cre
ated
par
t)
"X" D
iffer
ence
Basi
cD
imen
sion
(from
dra
win
g)
Actu
alM
easu
rem
ent
(from
pro
duce
d pa
rt)
"Y" D
iffer
ence
True
Pos
ition
Dat
um P
lane
"X" D
irect
ion
Dat
um P
lane
"Y" D
irect
ion
"Z" =
Act
ual
Posi
tiona
l Dia
met
er
Actu
al P
rodu
ced
Feat
ure
Cen
ter
Z
X
Y
=+
22
Form
ula
:Z2
XY
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
87
of 1
02
8.2.
Com
posi
te P
ositi
onal
Tol
eran
ce
Posi
tion,
Axi
s to
Sur
face
, Coa
xial
A
xis
to A
xis,
Coa
xial
Posi
tiona
l Tol
eran
cing
for C
oaxi
al H
oles
of S
ame
Size
A
B
9
18
n0.
25m
A
B C
n0.
15m
Aj4X
n10
.15
+0.1
50
C
Patte
rn L
ocat
ing
Posi
tion
Tole
ranc
e
Fea
ture
Rel
atin
g Po
sitio
n To
lera
nce
n0.
15 a
t MM
C, f
our
coax
ial
tole
ranc
e zo
nes w
ithin
whi
chth
e ax
es o
f the
hol
es m
ust l
iere
lativ
e to
eac
h ot
her
n0.
25 a
t MM
C, f
our
coax
ial
tole
ranc
e zo
nes l
ocat
ed a
t tru
epo
sitio
n re
lativ
e to
the
spec
ified
datu
ms w
ithin
whi
ch th
e ax
es o
fth
e ho
les a
s a g
roup
mus
t lie
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
88
of 1
02
Posi
tion,
Axi
s to
Sur
face
, Coa
xial
A
xis
to A
xis,
Coa
xial
Posi
tiona
l Tol
eran
cing
for C
oaxi
al H
oles
of S
ame
Size
, Par
tial (
Para
llelis
m)
Ref
inem
ent o
f Fea
ture
-Rel
atin
g A
xis
A
B
9
18
4X n
10.1
5 +0
.15
0
C
Ori
enta
tion
n0.
25m
A
B
Cn
0.15m
A
Bj
n0.
15 a
t MM
C, f
our
coax
ial
tole
ranc
e zo
nes w
ithin
whi
chth
e ax
es o
f the
hol
es m
ust l
iere
lativ
e to
eac
h ot
her
n0.
25 a
t MM
C, f
our
coax
ial
tole
ranc
e zo
nes l
ocat
ed a
t tru
epo
sitio
n re
lativ
e to
the
spec
ified
datu
ms w
ithin
whi
ch th
e ax
es o
fth
e ho
les a
s a g
roup
mus
t lie
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
89
of 1
02
Posi
tion,
Axi
s to
Axi
s, C
oaxi
al
24
80
24
20
10
70
40
9060
20
A
D
C
Ø 25
Ø 80
Ø 20
Ø 10
Ø 25
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
90
of 1
02
24
100
52
309615
0
134
4X
Ø 1
6.7
- 17.
3
Tole
ranc
e ±
0.5
---
------
------
-----
------
------
------
-----
------
------
------
------
------
-----
------
------
------
------
------
-----
------
------
------
------
------
-----
------
------
------
------
-----
------
------
------
------
------
-----
------
------
------
------
------
-----
------
------
------
------
-----
------
------
------
------
------
------
-----
------
------
------
------
---
CB
AØ
0.7
M
24
100
52
309615
0
134
4X
Ø 1
6.7
- 17.
3
Tole
ranc
e ±
0.5
2452
3096
C B
A
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
91
of 1
02 C
BA
Ø 1
.5M
AØ
0.7
M
BC
A
24
100
52
309615
0
134
4X
Ø 1
6.7
- 17.
3
Tole
ranc
e ±
0.5
2452
3096
------
------
------
------
------
------
-----
------
------
------
------
-----
------
------
------
------
------
-----
------
------
------
------
------
------
-----
------
------
------
------
-----
------
------
------
------
------
-----
------
------
------
------
------
-----
------
------
------
-----
------
------
------
------
------
-----
------
------
------
------
------
-----
------
------
------
----
BA
Ø 0
.7C
BA
Ø 1
.5M M
B
C
A
24
100
52
309615
0
134
4X
Ø 1
6.7
- 17.
3
Tole
ranc
e ±
0.5
2452
3096
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
92
of 1
02
B
C
A
24
100
52
309615
0
134
4X
Ø 1
6.7
- 17.
3
Tole
ranc
e ±
0.5
2452
3096
BA
Ø 0
.7C
BA
Ø 1
.5M M
8.
3. P
ositi
on T
oler
ance
Cal
cula
tion
Floa
ting
Fast
ener
To
cal
cula
te p
ositi
on to
lera
nce
with
fast
ener
and
hol
e si
ze k
now
n:
FH
T−
=
Whe
re T
= to
lera
nce,
H =
MM
C h
ole,
and
F =
MM
C fa
sten
er
Fixe
d Fa
sten
er
To
cal
cula
te p
ositi
on to
lera
nce
with
fast
ener
and
hol
e si
ze k
now
n:
2F
HT
−=
Whe
re T
= to
lera
nce,
H =
MM
C h
ole,
and
F =
MM
C fa
sten
er
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
93
of 1
02
8.4.
Pr
ojec
ted
Tole
ranc
e Zo
ne
(1)
In
terf
eren
ce d
iagr
am, f
aste
ner a
nd h
ole
(2
)
B
asis
for p
roje
cted
tole
ranc
e zo
ne
Cle
aran
ce h
ole
axis
Posi
tiona
lto
lera
nce
zone
True
pos
ition
axi
s
Thre
aded
hol
eax
is
Inte
rfer
ence
are
a
Tole
ranc
e zo
ne h
eigh
t is e
qual
to h
eigh
t of t
hrea
ded
hole
j n
0.5m
A B
C
Posi
tiona
lto
lera
nce
zone
Cle
aran
ce h
ole
axis
True
pos
ition
axi
s
Thre
aded
hol
eax
isM
in. t
oler
ance
zon
e he
ight
is e
qual
to m
ax. t
hick
ness
of m
atin
g pa
rt
j n
0.5m
p
10.0
A B
C
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
94
of 1
02
8.5.
Con
cent
ricity
C
once
ntric
ity is
that
con
ditio
n w
here
the
med
ian
poin
ts o
f all
diam
etric
ally
opp
osed
el
emen
ts o
f a fi
gure
of r
evol
utio
n (o
r cor
resp
ondi
ng-lo
cate
d el
emen
ts o
f tw
o or
mor
e ra
dial
ly d
ispo
sed
feat
ures
) are
con
grue
nt w
ith th
e ax
is (o
r cen
ter p
oint
) of a
dat
um.
A co
ncen
trici
ty to
lera
nce
is a
cyl
indr
ical
(or s
pher
ical
) tol
eran
ce z
one
who
se a
xis
(or
cent
er p
oint
) coi
ncid
es w
ith th
e ax
is (o
r cen
ter p
oint
) of t
he d
atum
feat
ure.
The
med
ian
poin
ts o
f all
corre
spon
ding
ly-lo
cate
d el
emen
ts o
f the
feat
ure
bein
g co
ntro
lled,
rega
rdle
ss
of fe
atur
e si
ze, m
ust b
e w
ithin
the
cylin
dric
al to
lera
nce
zone
. Th
e sp
ecifi
ed to
lera
nce
and
the
datu
m re
fere
nce
can
only
app
ly o
n an
RFS
bas
is.
MEA
NIN
G
ON
TH
E D
RAW
INGA
Dat
um A
xis
A
20.2
19.8
n
10.2
9.8
n
Med
ian
poin
ts o
f dia
met
ical
lyop
pose
d el
emen
ts o
f fea
ture
n
0.2
Ar
Tole
ranc
e Zo
ne (R
FS)
n0.
2
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
95
of 1
02
8.6.
Sym
met
ry
Sym
met
ry is
that
con
ditio
n w
here
the
med
ian
poin
ts o
f all
oppo
sed
or c
orre
spon
ding
ly
loca
ted
elem
ents
of t
wo
or m
ore
feat
ure
surfa
ces
are
cong
ruen
t with
the
axis
or c
ente
r pl
ane
of a
dat
um fe
atur
e. T
he m
ater
ial c
ondi
tion
RFS
onl
y is
to a
pply
.
MEA
NIN
G
ON
TH
E D
RAW
ING
A Dat
um F
eatu
re A
(RFS
)
10.2
9.8
All m
edia
n po
ints
of o
ppos
ed e
lem
ents
of t
he s
lot m
ust l
ie w
ithin
the
0.2
wid
e to
lera
nce
zone
, RFS
. Th
e to
lera
nce
zone
bei
ng e
stab
lishe
d by
two
para
lle p
lane
s eq
ually
dis
pose
d ab
out d
atum
cen
terp
lane
A, R
FS.
0.1
0.2
Ai
30.2
29.8
0.2
Wid
e To
lera
nce
Zone
(RFS
)
Dat
um C
ente
rpla
ne A
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
96
of 1
02
8.7.
Exe
rcis
e 1.
Insp
ectio
n R
epor
t H
ole
# Ac
tual
“X” L
ocat
ion
Actu
al “Y
” Loc
atio
n H
ole
Size
1
29.7
5 76
.5
17.2
2
126.
3 75
.85
17
3 30
.4
24.4
3 16
.9
4 12
5.91
23
.48
17.1
Hol
e #
Actu
al L
ocat
ion
Hol
e
Size
Po
sitio
n
Tol.
Ac
cept
Rej
ect
1 X
=
Y =
2 X
= Y
=
3 X
= Y
=
4 X
= Y
=
CB
AØ
0.7
M
24
100
52
309615
0
134
4X
Ø 1
6.7
- 17.
3
2452
3096
C B
A
#1#2
#3#4
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
97
of 1
02
2.
Dra
win
g Re
quir
emen
ts
CB
AØ
1.0
M30
3X
Ø 1
5.0
- 15.
5
Tole
ranc
e ±
0.5
2440
30
C B
A
100
Pr
oduc
ed P
art 24
.25
63.6
6
29.4
7
100.
35C B
A
30.6
2
Prod
uced
Hol
e15
.38
Prod
uced
Hol
e15
.30
Prod
uced
Hol
e15
.15 23
.48
#1 #2#3
H
ole
# H
ole
MM
C
Hol
e A
ctua
l Si
ze
Posi
tion
Tole
ranc
e A
llow
ed
“X”
Dis
tanc
e “Y
” D
ista
nce
Posi
tion
Loca
tion
Acc
ept
Reje
ct
1
2
3
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
98
of 1
02
3.
B A 0.5 34.00 - 34.25
32
15
A
A Ø 0.1
B
M
4X Ø 10.9 - 11.4A Ø 1B C M
8
Ø 110
M
C
± 0.1
2X 40
2X 40
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
99
of 1
02
Insp
ectio
n Re
port
for H
ub C
over
Item
#A
ctua
l Siz
eX
Dim
ensi
onY
Dim
ensi
onC
omm
ents
B34
.09
+0.1
+0.1
C8.
050.
59---
111
.25
+0.3
39.7
2
211
.340
.25
+0.5
5
311
.04
-0.2
140
.54
411
.28
40.4
8+0
.26
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
100
of 1
02
A 0.5 34.00 - 34.25
32
15
A
A Ø 0.1
B
M
4X Ø 10.9 - 11.4A Ø 1BMCM M
8
Ø 110
MBM
C
± 0.1
2X 40
2X 40
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
101
of 1
02
4X Ø
6.4
5 - 6
.80
Z
5113
1332
X
Y6M
Cap
Scr
ews
ZY
XØ
2M
XØ
M
CB
AØ
2M
AØ
MC
5113
1332
B
A
0.5
2 SU
RF
Hol
e M
MC
=
- Sc
rew
MM
C =
------
------
------
------
------
------
--
T
oler
ance
=
4X Ø
6.4
5 - 6
.80
Geo
met
ric D
imen
sion
ing
& T
oler
anci
ng
A
SME
Y14.
5M-1
994
Page
102
of 1
02
4X Ø
6.4
5 - 6
.80
Z
5113
1332
X
Y
4X 6
M
ZY
XØ
2M
XØ
M
CB
AØ
2M
AØ
MC
5113
1332
B
A
0.5
2 SU
RF
Hol
e M
MC
=
- Sc
rew
MM
C =
------
------
------
------
------
------
--
T
oler
ance
=
6M C
ap S
crew
s