ptfe sliders
TRANSCRIPT
PT
FE
Sli
de
Be
ari
ng
s1.
0G
EN
ER
AL
INF
OR
MA
TIO
N
In a
wid
e ra
nge
of a
pplic
atio
ns,
PT
FE
Slid
e be
arin
gs a
re s
uper
ior
to c
onve
ntio
nal e
xpan
-si
on p
late
s, r
olle
rs a
nd r
ocke
r ar
m t
ype
supp
orts
.T
hey
supp
ort
petr
oche
mic
al p
lant
,he
avy
mac
hine
ry,
pipe
lines
, bu
ildin
gs a
nd b
ridge
gird
ers;
they
acc
omm
odat
e ex
pans
ion,
cont
ract
ion
and
othe
r re
cipr
ocat
ing
mot
ions
of
any
stru
ctur
e th
at m
oves
as
a re
sult
of t
her-
mal
, se
ism
ic o
r di
ffere
ntia
l for
ces.
Bea
rings
for
such
app
licat
ions
mus
t op
erat
e at
hig
h lo
ads
and
low
spe
eds,
and
it is
und
erju
st t
hese
con
ditio
ns t
hat
the
self-
lubr
icat
ing
prop
ertie
s of
PT
FE
are
at
max
imum
.T
his
fact
or,
toge
ther
with
its
no s
tick-
slip
and
ant
i-wea
ther
ing
char
acte
ristic
s, is
the
prin
cipl
ere
ason
why
PT
FE
has
pro
ved
to b
e so
suc
cess
ful a
s a
slid
e be
arin
g m
ater
ial.
2.0
AD
VAN
TAG
ES
2.1
The
sim
plic
ity o
f th
e be
arin
g de
sign
and
its
ease
of
fabr
icat
ion
and
inst
alla
tion
mak
e th
e un
it co
st e
ffici
ent.
2.2
The
cos
ts o
f a
cons
truc
tion
can
be r
educ
ed b
y de
sign
ing
for
expa
nsio
n ra
ther
tha
nst
rain
.2.
3C
oeffi
cien
t of
fric
tion
over
the
bea
ring
surf
ace
rem
ains
con
stan
t, ev
en u
nder
wor
stca
se c
ondi
tions
.2.
4T
he b
earin
gs a
re m
aint
enan
ce f
ree
- P
TF
E is
inhe
rent
ly s
elf-
lubr
icat
ing,
whi
le d
irt
part
icle
s ar
e ab
sorb
ed in
to t
he m
ater
ial.
Onl
y si
mpl
e pr
otec
tion
is r
equi
red
agai
nst
the
sign
ifica
nt in
gres
s of
dir
t.
3.0
DE
SIG
N /
SE
LE
CT
ION
Car
pent
er &
Pat
erso
n of
fers
a s
peci
alis
t se
rvic
e, b
ased
on
man
y ye
ars
exp
erie
nce
in
the
use
of P
TF
E a
nd it
s ap
plic
atio
n to
slid
e be
arin
gs t
o as
sist
in t
he d
esig
n of
bea
ring
syst
ems.
Low
fric
tion
slid
ers
with
a c
oeffi
cien
t of
fric
tion
less
tha
n 0.
1are
ava
ilabl
e.T
hey
are
desi
gned
spe
cific
ally
for
the
load
s an
d m
ovem
ents
req
uire
d.M
ost
asse
mbl
ies
are
also
des
igne
d to
be
com
patib
le w
ith o
ur r
ange
of
stan
dard
slid
ers
and
glid
es,
such
as
Fig
381
, F
ig 3
82,
Fig
384
, et
c as
illu
stra
ted
on p
age
153.
Als
o ‘s
tand
alo
ne’S
lide
Bea
ring
San
dwic
h P
late
s F
ig n
o S
LB 9
0 ar
e av
aila
ble
- as
sh
own
on p
age
1 52.
4.0
BE
AR
ING
AS
SE
MB
LIE
S
Car
pent
er &
Pat
erso
n S
lide
Bea
rings
con
sist
of
a si
ngle
PT
FE
pad
cou
nter
face
d w
ith
a po
lishe
d st
ainl
ess
stee
l pla
te.
The
ass
embl
y is
des
igne
d to
ens
ure
that
the
PT
FE
pad
is
cov
ered
by
the
S/S
pla
te t
hrou
ghou
t th
e ex
pect
ed d
esig
n m
ovem
ents
.
The
bas
ic e
lem
ent
is a
5m
m P
TF
E s
heet
, re
cess
ed in
to a
10m
m s
teel
bac
king
pla
te fo
r st
raig
ht fo
rwar
d fie
ld in
stal
latio
n by
wel
ding
or
bolti
ng.
The
cor
resp
ondi
ng 3
mm
thic
k po
lishe
d st
ainl
ess
stee
l pla
te is
sho
p fit
ted
to a
6m
m t
hick
car
bon
stee
l pla
te.
Alte
rnat
ive
thic
knes
ses
and
mat
eria
ls fo
r th
e ba
ckin
g pl
ates
can
be
supp
lied.
Whe
re o
pera
ting
cond
ition
s re
quire
the
m,
ther
mal
insu
latio
n an
d vi
brat
ion
dam
ping
pad
sm
ay b
e bo
nded
bet
wee
n th
e P
TF
E s
heet
and
the
bac
king
pla
te,
or b
etw
een
the
back
ing
plat
e an
d th
e st
ruct
ure.
To a
llow
ope
ratio
n at
hig
h am
bien
t te
mpe
ratu
re,
a hi
gh t
empe
ra-
ture
epo
xy r
esin
sys
tem
is u
sed
for
bond
ing,
and
the
adh
esiv
es a
re c
ured
und
er s
tric
tlyco
ntro
lled
cond
ition
s, e
nsur
ing
that
the
bon
d is
str
onge
r ta
n th
e P
TF
E it
self.
As
stan
dard
virg
in P
TF
E is
use
d as
the
bea
ring
mat
eria
l, th
e lo
ad b
earin
g ca
paci
ty is
140
kg/c
m2
5.0
CO
EF
FIC
IEN
TS
OF
FR
ICT
ION
The
coe
ffici
ent
of f
rictio
n of
PT
FE
mat
eria
ls is
dep
enda
nt o
n m
any
varia
ble,
incl
udin
g pr
es-
sure
, sl
idin
g ve
loci
ty a
nd t
empe
ratu
re.
Opi
nion
is d
ivid
ed a
bout
the
effe
ct o
f so
me
vari-
able
s, a
lthou
gh it
is a
gree
d th
at h
igh
pres
sure
and
low
vel
ociti
es fa
vour
low
fric
tion.
The
coe
ffici
ent
is le
ss t
han
that
of
any
othe
r so
lid e
ngin
eerin
g m
ater
ial.
It ha
s be
en v
ari-
ousl
y re
port
ed f
rom
0.0
2 to
0.2
, bu
t th
is d
epen
ds o
n su
rfac
e pr
epar
atio
n an
d th
e te
stm
etho
d.T
he lo
ad/fr
ictio
n ch
art
(Fig
ure
1) s
how
s th
e ef
fect
of
the
load
.
In g
ener
al,
the
coef
ficie
nt o
f fr
ictio
nbe
twee
n th
e m
atin
g su
rfac
e an
d th
eP
TF
E s
lide
bear
ing
pad
will
be
at a
min
imum
whe
n th
e st
ress
in t
he P
TF
Eis
at
a m
axim
um (
cons
iste
nt w
ithac
cept
able
lim
its o
f cr
eep)
, th
e be
arin
gis
mad
e fr
om u
nfill
ed P
TF
E,
and
the
finis
h of
the
mat
ing
surf
ace
is h
ighl
ypo
lishe
d.
In a
dditi
on,
one
of t
he m
ost
impo
rtan
tfr
ictio
nal c
hara
cter
istic
s of
PT
FE
is t
heab
senc
e of
‘stic
k-sl
ip’,
beca
use
unlik
eal
l oth
er c
onve
ntio
nal b
earin
gs,
the
sta-
tic f
rictio
n of
PT
FE
is e
qual
to
or o
nly
mar
gina
lly h
ighe
r th
an t
he d
ynam
ic f
ric-
tion.
04/10 149
As
stan
dard
gla
ss f
illed
PT
FE
is u
sed
as t
he b
earin
g m
ater
ial,
the
load
bea
ring
capa
city
is 1
40 k
g/cm
2
Fig
ure
1C
OE
FF
ICIE
NT
OF
FR
ICT
ION
: E
FF
EC
TO
F L
OA
DIN
G
Bea
ring
Pre
ssur
e (k
g/cm
2 )(N
ote:
Virg
in P
TF
E =
70
kg/c
m2 lo
ad c
apac
ity
Coefficient of Friction
PT
FE
Sli
de
Be
ari
ng
s6.
0RE
COM
MEN
DED
MAX
IMUM
BEAR
ING
PRES
SURE
SFi
gure
2in
dica
tes
the
optim
umpr
essu
re,b
utde
pend
ing
onci
rcum
stan
ces,
desi
gnpr
essu
res
may
beal
lowe
dto
vary
from
the
optim
um.
With
thes
epr
essu
res,
ade
sign
coef
ficie
ntof
frict
ion
of0.
1fo
runf
illed
PTFE
or0.
12fo
rfille
dPT
FEw
illgi
vea
sign
ifica
ntm
argi
nof
safe
tyw
hen
oper
atin
gco
nditi
ons
cann
otac
cura
tely
bepr
edic
ted,
butt
hefig
ures
obta
ined
inpr
ac-
tise
will
norm
ally
beco
nsid
erab
lyle
ssth
anth
ese.
7.0
THER
MAL
INSU
LATI
ON
Whe
reth
ete
mpe
ratu
reat
the
face
sof
the
PTFE
islik
ely
toex
ceed
200˚
Cby
cond
uctio
nth
roug
hth
ebe
arin
gco
mpo
nent
s,a
ther
mal
barri
erm
ustb
ein
terp
osed
betw
een
the
heat
sour
cean
dth
esl
idin
gun
it.C
arpe
nter
&Pa
ters
onre
com
men
dth
eus
eof
Mon
olux
500
-th
eth
ickne
ssre
quire
dca
nbe
com
pute
dfro
mth
egr
aph
inFi
gure
3.Th
egr
aph
show
sth
eex
tern
alsu
rface
tem
pera
ture
that
can
bean
tic-
ipat
edus
ing
Mon
olux
500
inco
nstru
ctio
nsup
to10
0mm
thick
ness
,bas
edon
prac
tical
test
s.Th
eac
tual
surfa
cete
mpe
ratu
rew
illdi
fferw
ithva
riatio
nsin
surfa
ceco
nduc
tanc
e.8.
0BO
NDIN
GO
FPT
FE
Che
mic
albo
ndin
gis
the
reco
mm
ende
dm
etho
dfo
rloc
atin
gth
ebe
arin
gm
ater
ialo
nits
supp
ort,
beca
use
the
shea
rval
ueof
the
epox
yad
hesi
veis
grea
tert
han
that
ofth
ePT
FE.
Allb
onde
dPT
FEel
emen
tsar
eno
tadv
erse
lyaf
fect
edby
expo
sure
toU
ltra
Viol
etlig
ht,p
ro-
vidi
ngth
em
inim
umth
ickne
ssre
quire
men
tof
1.5m
mis
met
.Si
tebo
ndin
gof
PTFE
isno
trec
omm
ende
d-s
trict
lyco
ntro
lled
cond
ition
sof
clea
nlin
ess,
pres
sure
and
tem
pera
ture
are
requ
ired
toob
tain
asa
tisfa
ctor
ybo
ndbe
twee
nth
ePT
FEan
dth
esu
bstra
te.
9.0
MAT
ERIA
LTH
ICKN
ESS
The
idea
lthi
ckne
ssha
sbe
enfo
und
tobe
5mm
,due
toth
ere
cess
ing
requ
irem
ent.
This
isth
icken
ough
toal
low
fors
ome
cons
truct
iona
lmis
alig
nmen
tand
toal
low
ford
irtan
dgr
item
bedm
ent.
10.0
INST
ALLA
TIO
N
The
bear
ing
com
pone
nts
can
belo
cate
dto
the
inst
alla
tion
bybo
lting
,tac
k-we
ldin
g,fu
llwe
ldin
gor
mor
tare
mbe
dmen
t,an
dth
eap
prop
riate
type
ofbe
arin
gsh
ould
bech
osen
acco
rdin
gto
the
inst
alla
tion
met
hod.
The
PTFE
shou
ldbe
adeq
uate
lypr
otec
ted
agai
nst
weld
spat
ter,
pain
tspr
ay,m
etal
swar
fetc
,dur
ing
inst
alla
tion.
11.0
PAD
DIM
ENSI
ONS
The
top
bear
ing
pad
shou
ldbe
larg
erth
anth
ebo
ttom
pad
byan
amou
nteq
ualt
oth
eex
pect
edm
ovem
ent,
inor
dert
om
aint
ain
aco
nsta
ntco
ntac
tare
a.
12.0
BEAR
ING
TEM
PERA
TURE
The
tem
pera
ture
atth
esu
rface
ofth
ePT
FEsh
ould
gene
rally
bele
ssth
an12
0˚C
and
shou
ldne
vere
xcee
d20
0˚C.
Asa
rule
ofth
umb,
unde
rnor
mal
cond
ition
sth
ete
mpe
ratu
refa
llsby
200˚
Cfo
reve
ry10
0mm
from
the
heat
sour
ce(in
ambi
enta
ir)-f
orex
ampl
e,a
typi
-ca
lhor
izont
alve
ssel
oper
atin
gat
500˚
Cw
illha
vea
botto
m-o
f-sad
dle
tem
pera
ture
ofab
out
150˚
C.
Tem
pera
ture
does
notn
orm
ally
pres
enta
prob
lem
.H
owev
er,i
fthe
bear
ing
tem
pera
ture
islik
ely
toex
ceed
200˚
Ca
ther
mal
insu
lato
rsho
uld
befit
ted
betw
een
the
stru
ctur
ean
dth
ebe
arin
gba
ckpl
ate
(See
7.0
-use
ofM
onol
uxm
ater
ial).
13.0
VIBR
ATIO
N/AC
COUS
TIC
DAM
PING
PADS
Slid
ebe
arin
gun
itsca
nbe
built
with
ava
riety
ofel
asto
mer
com
posi
tein
terla
yers
orba
ck-
ings
tosu
itcu
stom
ers
desi
gnpa
ram
eter
sw
hen
acou
stic
orvi
brat
ion
dam
ping
isne
ces-
sary
.El
asto
mer
sm
aybe
used
whe
nsi
mpl
ean
gula
rorr
otat
iona
lmov
emen
tsar
ere
quire
d.
14.0
SLID
EWAY
RIG
IDIT
YW
hen
ase
ries
ofsl
ide
bear
ings
isus
edto
form
asl
idew
ay,f
orex
ampl
efo
roil
rigm
ove-
men
t,th
esl
idew
aysu
ppor
tsm
ustb
esu
ffici
ently
rigid
toav
oid
defle
ctio
nof
the
indi
vidu
albe
arin
gsor
unev
enlo
adin
g.D
efle
ctio
nof
only
afe
wde
gree
sco
uld
sign
ifica
ntly
incr
ease
the
appa
rent
coef
ficie
ntof
frict
ion,
and
coul
dca
use
bear
ing
failu
reif
allt
helo
adis
carri
edby
one
end
ofth
ebe
arin
gpa
d.
04/10150
Figu
re2
REC
OM
MEN
DED
MAX
IMU
MBE
ARIN
GPR
ESSU
RE
Tem
pera
ture
o C
BearingPressurekg/cm2
Figu
re3
MO
NO
LUX
500
TEM
PER
ATU
RE
CH
ANG
EFO
RVA
RIO
US
THIC
KNES
SES
ColdFaceSurfaceTemperature oC
Hot
Face
Surfa
ceTe
mpe
ratu
re(o C
)
The
Tem
pera
ture
atsu
rface
ofPT
FEsh
alln
ever
exce
ed14
0°C
Alte
rnat
ive
mec
hani
calb
ondi
ng(u
sing
coun
ters
unk
head
edsc
rew
s)is
avai
labl
e,al
low
ing
tem
pera
ture
atsu
rface
ofPT
FEup
tom
axim
umof
200°
C.
PT
FE
Sli
de
Be
ari
ng
s15
.0D
ES
IGN
ST
EP
S
The
follo
win
g st
eps
will
pro
vide
an
indi
catio
n of
the
slid
e be
arin
g re
quire
men
ts fo
r a
part
ic-
ular
app
licat
ion:
1.D
eter
min
e th
e lo
ad o
f th
e st
ruct
ure
- th
is w
ill in
dica
te t
he t
otal
bea
ring
area
requ
ired
at a
sui
tabl
e be
arin
g pr
essu
re.
2.D
ecid
e th
e nu
mbe
r an
d po
sitio
ns o
f th
e be
arin
gs a
ccor
ding
to
the
rigid
ity a
nd f
unc-
tion
of t
he s
truc
ture
.
3.Ta
ke a
ccou
nt o
f op
erat
ing
tem
pera
ture
lim
its,
and
spec
ify a
ny n
eces
sary
the
rmal
insu
latio
n.
4.C
onsi
der
any
unus
ual c
ondi
tions
affe
ctin
g th
e be
arin
gs,
such
as
the
need
for
addi
-tio
nal t
herm
al in
sula
tion,
dam
ping
pad
s, e
tc.
5.D
ecid
e th
e m
ost
appr
opria
te m
etho
d of
mou
ntin
g th
e be
arin
gs.
6.S
elec
t th
e ty
pes
of b
earin
gs r
equi
red
and
spec
ify t
heir
dim
ensi
ons.
16.0
TE
CH
NIC
AL
AD
VAN
TAG
ES
OF
PT
FE
SL
IDE
BE
AR
ING
S
*P
TF
E h
as t
he lo
wes
t co
effic
ient
of
fric
tion
of a
ny k
now
n so
lid e
ngin
eerin
g m
ater
ial,
incl
udin
g lu
bric
ated
met
al.
*T
here
is n
o st
ick-
slip
act
ion.
*T
hey
have
inde
finite
life
, si
nce
chem
ical
s an
d w
eath
er h
ave
no e
ffect
on
PT
FE
-m
oist
ure
abso
rptio
n is
less
tha
n 0.
01%
eve
n un
der
icin
g co
nditi
ons
or im
mer
sion
,an
d th
e m
ater
ial i
s ch
emic
ally
iner
t.
*N
o m
aint
enan
ce is
req
uire
d, P
TF
E w
ill n
ever
col
d w
eld
to it
self
and
ther
efor
ere
quire
s no
lubr
icat
ion.
*T
he b
earin
gs a
re e
asily
inst
alle
d, e
ither
pre
-ass
embl
ed o
r on
site
.
*P
TF
E b
earin
gs a
re fa
r le
ss b
ulky
tha
n al
tern
ativ
e as
sem
blie
s.
*T
here
is n
o po
ssib
ility
of
fatig
ue fa
ilure
.
*E
lect
rical
and
the
rmal
insu
latio
n m
inim
ise
galv
anic
cor
rosi
on a
nd h
eat
loss
.
*V
ibra
tions
are
dam
ped
*S
mal
l par
ticle
s w
hich
may
bec
ome
embe
dded
do
not
caus
e bi
ndin
g of
the
sur
face
s.
*T
he s
lide
bear
ing
can
acco
mm
odat
e so
me
mis
alig
nmen
t in
con
stru
ctio
n w
ithou
tse
tting
up
stre
ss c
orro
sion
alo
ng a
lead
ing
edge
, as
can
occ
ur in
con
vent
iona
lbe
arin
gs.
04/10 151
04/10152
Lm
mSI
ZER
ECO
MM
END
EDM
MO
VEM
ENT
RAN
GE
LOAD
ING
(Kgf
)m
mA
BC
110
0-50
070
6090
120
240
0-20
0090
8011
014
03
800-
4500
110
100
130
160
415
00-8
000
130
120
150
180
525
00-1
3000
150
140
170
200
640
00-2
2000
180
170
200
230
770
00-4
3000
230
220
250
280
812
000-
7000
028
027
030
033
0
SLID
EBE
ARIN
GL
mm
MM
OVE
MEN
TR
ANG
Em
mA
BC
7060
9012
090
8011
014
011
010
013
016
013
012
015
018
015
014
017
020
018
017
020
023
023
022
025
028
028
027
030
033
0
P
SQU
ARE
20 40 60 80 100
130
180
230
P mm
-5
PT
FE
Sli
de
Be
ari
ng
s
FIG
.SLB
90
NO
TES:
RAN
GE
AAL
LOW
S±
13m
mM
OVE
MEN
TB
ALLO
WS
±25
mm
MO
VEM
ENT
CAL
LOW
S±
40m
mM
OVE
MEN
T
TOP
PLAT
EC
ANBE
SUPP
LIED
SQU
ARE
OR
REC
TAN
GU
LAR
TOC
ATER
FOR
CO
OR
DIN
ATE
DIR
ECTI
ON
MO
VEM
ENTS
.
STAN
DAR
DBE
ARIN
GIS
DES
IGN
EDFO
RSI
TEW
ELD
ING
.AL
TER
NAT
IVE
BOLT
EDAT
TAC
HM
ENT
CAN
BESU
PPLI
ED.
ITIS
REC
OM
MEN
DED
THAT
SLID
ING
CO
NTA
CT
SUR
FAC
ESAR
EIN
STAL
LED
PAR
ALLE
LTH
RO
UG
HO
UT
THE
MO
VEM
ENT
RAN
GE
NO
TE:
ADH
ESIV
ESAV
AILA
BLE
FOR
BON
DIN
GR
ECES
SED
PTFE
,WIL
LLI
MIT
THE
MAX
IMU
MAL
LOW
ABLE
TEM
PER
ATU
RE
ATTH
ESU
RFA
CE
OF
PTFE
TO14
0ºC
ALTE
RN
ATIV
EM
ECH
ANIC
ALBO
ND
ING
(USI
NG
CO
UN
TER
SUN
KH
EAD
EDSC
REW
S)W
ILL
ALLO
WM
AXIM
UM
TEM
PO
F20
0ºC
CAR
BON
STEE
LBA
CKI
NG
PLAT
E
5.0
THIC
KPT
FEBO
ND
EDIN
TOR
ECES
SED
CAR
BON
STEE
LBA
CKI
NG
PLAT
ESQ
UAR
E
STAI
NLE
SSST
EEL
SEM
I-REF
LEC
TIVE
2BFI
NIS
H
10
3
PT
FE
Sli
de
Be
ari
ng
sTy
pica
l slid
er s
uppo
rt a
rran
gem
ent u
tilis
ing
stan
dard
Car
pent
er &
Pat
erso
n Lt
d pi
pe s
addl
es.
04/10 153