11460 BEOGRAD (Barajevo)

IND. ZONA LIPOVICA29. Novembra 1E Telefon/Fax.:

www.gtocila.co.yu ginic@eunet.rs011 8326002

The position of “GT” in the European market.

“GT”

We cannot say that we are the best, but for the majority ofproducts few firms are better than us

Why is it to b y our products

tand

- We do sale KNOW-HOW as well.

.

recommended u ?- The quality of grinding wheels is on a par with the Europeanquality ( and we are always ready to prove it)- The prices are lower than for similar European products.- The widest assortment of whetstones: all shapes, sizes andbond types (V, B, Bf, R).- Permanent quality and fast delivery thanks to the state-of -art technology and machinery.- Wheels are produced in accordance with the strictes ISOEN norms from the best quality raw materials.- The management and production personnel withinternational experience guarantee quality and highbusiness standard of the firm.

All this enabled the firm, originally a workshop, to turninto a modern factory.

AERODROM

NIŠ

ČAČAK

RUŠANJ

KRUŽNI PUT

DUNAV

SAJMIŠTE

SAVA

PETLOVOBRDO

ZAGREB

KRUŽNIPUT

RIPANJ

ORLOVAČA

0km

10km

20km

Specification of grinding wheel are very important, as they are closely related to the grinding performance

its choice depends on the kind of material or kind of steel that isground. The general rule holds that softer steels are whetted with harder and tougher regular aluminiumoxide “A”, while hardened and high-strenght steels are whetted with brittle noble corundum: 38A, 25A,32A, 60A, etc.

it is directly related to whetting capacity and the required surface (Ra,Rt).

The rule is that softer materials are ground with “harder” wheel, while hardermaterials are ground with “softer” wheel.

(number of grit in cubic centimeter of wheel) It depend surface of thewheel and the object that is ground, as well as some other factors. The rule is that for a wider and largercontact we choose a more open structure, and for a smaller-narrower contact we choose a more closedstructure.

It is closely connected white the periphery speed ofthe wheel, method of grinding and type of grinder. White corundum (38A) grinders are produced in twocolors of ceramic bond. White bond (V) and red-brick bond(Vred). It is common (and our firm follows therule) that softer wheel (H,J,K) are made from white bond (V), while harder wheel (L,M,N) are made fromred-brick bond (Vred), thus softer and harder wheel are easily differentiated in shops

.

38A 60 K 6 V

The first sign

The second sign

The third sign

The fourth sign ''

The fifth sign

''38A'' - type of grit;

''60'' - grit size;

''K'' - hardness of wheel;

6'' - structure;

''V'' - type of bond; (V, B, Bf, R),

grinding It is the force causing the abrasive grains to breakout of the bond composite.

KAY TO WHEELS

aluminium oxide

silicon carbide

19A

38A

25A32A

regular

white

pink

ruby

monocristalline

39C37C

greenblack

Type of abrasive Grit Size Grade

softG - H - J

mediumK - L - M

hardN - O - P

very hardQ - R - S

Structure

dense2 - 3 - 4

medium5 - 6

open7 - 8 - 9

porous11 - 13 - 15

V vitrified

B resin

Bfresinreinforced

Type of Bond

FORM DIMENSION SPECIFICATIONDIAMETER THICKNESS HOLEx x

F1 400 x 40 x 127 38A 60 K 6 V

A

60A25/38ASAZA

A+38A mixture

blandceramic specialzirconium

R rubber

vitrifiedredV red

very coarse14 16 20

mm 1.4 1.2 1.0

coarse24 30 36

mm 0.7 0.6 0.5

medium46 60 80

mm 0.35 0.25 0.18

fine100 120 150

mm 0.07 0.06 0.04

very fine180 220 280

mm 0.13 0.10 0.08

The more information we have, the more adequate is the choice of proper wheel. (mark or add)

TECHNICAL QUESTIONNAIRE - *information relevant for the choice of wheel is marked with an asterisk

Wheel that has so far been used or which is required:Shape - Type* Dimensions* Specification* Producer

Did the wheel give satisfaction?YES* NO* too coarse, too fine, too hard, too soft, etcObservation............................................................................................................................................................Grinding operation* surface grinding, internal, external, centerless, tool grindingGrinding machine/type/name of producerWheel speed (m/s)......................... rpmWork piece speed rpm Table speed ......................In feed Stock removal ..........................Dry grinding Wet grinding Coolant .............................Desired surface finish Dressing with

Material/WorkpieceDescription of workpiece dimensionHardened steel YES NO HardnessState of workpiece snagged finished, non processedSurface contact plain,

( ...)

: ................................................kw..........................

( ).....................................( )............................ (m/min)..................................................

................................................................... (mm)....................................................... ............ ..........................................................

Ra*.......Rt...... :.................................................................

............................................. ...........................................................................: * * HRC..........: ,

: discontinues, non discontinues

User (Company)..................................................... Contact person:.................................. Phone:....................

SPECIFICATION

- 2 -

surface grindingwith grinding wheels

external cylindricalgrinding

internalcylindric grinding

centerlessgrinding

surface grindingwith segments

F3101 F3102 F3104

F3105 F3108 F3109

BB

B BB

B

C CC

C CC

L LL

L LL

A A

A A

R

R

R

BxCxLB/AxCxL R

B/AxCxL R

B/AxCxL RBxCxL R B/AxCxL

SUMMERY OF STANDARD SHAPES ISO 525

B

U=1/3T

65°

T

60°

0.5T

D E F

0.3T

L

T

60°60° 45°

P

45°

bond V, B, Bf, R

Standard peripheral profiles

Example: F1 rubP DxTxH

- 3 -

Safety speed control by EN 12413 standard

T

F

F7

DP

H D x T x H - P x F/G

G

T

N

F20

DK

H D x T x H - K N A

E

A

T

F

F21

DK

H D x T x H - P x F/G

G

T

F

F22

DK

H D x T x H - P x F/G

G

T

F

F23

DP

H D x T x H - P x F

T

F

F5

DP

H D x T x H - P x F

D

T

D x T x HHF1

F2

T

D

W

D x T - W

T

HF37

D

H

F41

F27 TT

D

R

T

F

F24

DP

H D x T x H - P x F/G

G

Specification of grinding wheel are very important, as they are closely related to the grinding performance

its choice depends on the kind of material or kind of steel that isground. The general rule holds that softer steels are whetted with harder and tougher regular aluminiumoxide “A”, while hardened and high-strenght steels are whetted with brittle noble corundum: 38A, 25A,32A, 60A, etc.

it is directly related to whetting capacity and the required surface (Ra,Rt).

The rule is that softer materials are ground with “harder” wheel, while hardermaterials are ground with “softer” wheel.

(number of grit in cubic centimeter of wheel) It depend surface of thewheel and the object that is ground, as well as some other factors. The rule is that for a wider and largercontact we choose a more open structure, and for a smaller-narrower contact we choose a more closedstructure.

It is closely connected white the periphery speed ofthe wheel, method of grinding and type of grinder. White corundum (38A) grinders are produced in twocolors of ceramic bond. White bond (V) and red-brick bond(Vred). It is common (and our firm follows therule) that softer wheel (H,J,K) are made from white bond (V), while harder wheel (L,M,N) are made fromred-brick bond (Vred), thus softer and harder wheel are easily differentiated in shops

.

38A 60 K 6 V

The first sign

The second sign

The third sign

The fourth sign ''

The fifth sign

''38A'' - type of grit;

''60'' - grit size;

''K'' - hardness of wheel;

6'' - structure;

''V'' - type of bond; (V, B, Bf, R),

grinding It is the force causing the abrasive grains to breakout of the bond composite.

KAY TO WHEELS

aluminium oxide

silicon carbide

19A

38A

25A32A

regular

white

pink

ruby

monocristalline

39C37C

greenblack

Type of abrasive Grit Size Grade

softG - H - J

mediumK - L - M

hardN - O - P

very hardQ - R - S

Structure

dense2 - 3 - 4

medium5 - 6

open7 - 8 - 9

porous11 - 13 - 15

V vitrified

B resin

Bfresinreinforced

Type of Bond

FORM DIMENSION SPECIFICATIONDIAMETER THICKNESS HOLEx x

F1 400 x 40 x 127 38A 60 K 6 V

A

60A25/38ASAZA

A+38A mixture

blandceramic specialzirconium

R rubber

vitrifiedredV red

very coarse14 16 20

mm 1.4 1.2 1.0

coarse24 30 36

mm 0.7 0.6 0.5

medium46 60 80

mm 0.35 0.25 0.18

fine100 120 150

mm 0.07 0.06 0.04

very fine180 220 280

mm 0.13 0.10 0.08

The more information we have, the more adequate is the choice of proper wheel. (mark or add)

TECHNICAL QUESTIONNAIRE - *information relevant for the choice of wheel is marked with an asterisk

Wheel that has so far been used or which is required:Shape - Type* Dimensions* Specification* Producer

Did the wheel give satisfaction?YES* NO* too coarse, too fine, too hard, too soft, etcObservation............................................................................................................................................................Grinding operation* surface grinding, internal, external, centerless, tool grindingGrinding machine/type/name of producerWheel speed (m/s)......................... rpmWork piece speed rpm Table speed ......................In feed Stock removal ..........................Dry grinding Wet grinding Coolant .............................Desired surface finish Dressing with

Material/WorkpieceDescription of workpiece dimensionHardened steel YES NO HardnessState of workpiece snagged finished, non processedSurface contact plain,

( ...)

: ................................................kw..........................

( ).....................................( )............................ (m/min)..................................................

................................................................... (mm)....................................................... ............ ..........................................................

Ra*.......Rt...... :.................................................................

............................................. ...........................................................................: * * HRC..........: ,

: discontinues, non discontinues

User (Company)..................................................... Contact person:.................................. Phone:....................

SPECIFICATION

- 2 -

surface grindingwith grinding wheels

external cylindricalgrinding

internalcylindric grinding

centerlessgrinding

surface grindingwith segments

F3101 F3102 F3104

F3105 F3108 F3109

BB

B BB

B

C CC

C CC

L LL

L LL

A A

A A

R

R

R

BxCxLB/AxCxL R

B/AxCxL R

B/AxCxL RBxCxL R B/AxCxL

SUMMERY OF STANDARD SHAPES ISO 525

B

U=1/3T

65°

T

60°

0.5T

D E F

0.3T

L

T

60°60° 45°

P

45°

bond V, B, Bf, R

Standard peripheral profiles

Example: F1 rubP DxTxH

- 3 -

Safety speed control by EN 12413 standard

T

F

F7

DP

H D x T x H - P x F/G

G

T

N

F20

DK

H D x T x H - K N A

E

A

T

F

F21

DK

H D x T x H - P x F/G

G

T

F

F22

DK

H D x T x H - P x F/G

G

T

F

F23

DP

H D x T x H - P x F

T

F

F5

DP

H D x T x H - P x F

D

T

D x T x HHF1

F2

T

D

W

D x T - W

T

HF37

D

H

F41

F27 TT

D

R

T

F

F24

DP

H D x T x H - P x F/G

G

39C38A38AA

180

D

80100125150

T

4050638080

H

2020

20(32)20(32)20(32)

W

6881020

E

1010131620

200250

D

100125150180

T

101013131620

H

20202020

20(32)25(32)

U

222334

J

406565100100130

STANDARD WHEEL SHAPES ISO525 for tool sharpening

200250

D

100125150180

T

688101314

H

20(32)20(32)20(32)20(32)20(32)25(32)

U

1.522333

J

40637585100125

300

D

150180200250

T

3632404050

H

20-3220-3220-3225-50.832-50.8

P

8090110150150

F

2020252530

F6

F3

F4

F5

F11

180

D

80100125150

T

3240405050

H

2020

20(32)20(32)20(32)

W

6881013

E J K

8 57 4610 71 5610 96 8113 114 9613 144 120

180

D

80100125150

T

1013131620

H

1320

20(32)3232

J=K

3136616676

W E min U

4 6 2.53333

5 76 78 910 11

F12

D

250250250300

T

14172228

H

32323232

U

3585

J P F

110 0 0110 100110 100 8110 90 15

100 3

Klinngeberg

Tip 1"

Tip 2"

J

D

H

T

U

H

E

T

W

D

U

D

H

J

T

DP

H

FT

DW

T

J

H

K

E

H

D

U

T

P

H

J

U

15º

F

T

J

U

H

K

D

W

TE

For order just specify: form (F), diameter (D) and hole (H) Example F6 D x H

- 4 -

REINFORCED WHEELS 80-100 m/sek FOUNDRY GRINDING WHEELS

WORKSHOP WHEELS for universal grinding, sharpening, turning and planing knives and bores

order example: F1 450x50x150 A16Q19B63

order example 200x20x20 38A60M6Vred 250x25x32 39C80K6V

Regular corundum wheel color is gray/blue for treated and non treated tool steel.-White corundum red bond hardness for hardened steel and- , "M" alloy steel HRC 60Silicon carbide green color, for HM - e.- tungsten karbid

For hand sharpening it is recommended to use one grade harder wheel (J K/L)

"A"

"38Ared"

"38A"

"39C"

SAW SHARPENING

rub B - bond V

F1B

U=1/3T

65°

T

60°

0.5T

D E F

60° 60°

0.3T

A

order example 180x6x22 -A- for steel

bond Bf bond B, V.

bond V

rub A - bond B

F1 - with profiles

DxTxH Tool steel HSS steel HM-tungsten carbide125x1.0 do 12 x 20150x1.0 do 12 x 20175x1.0 do 12 x 20200x1.0 do 12 x 20250x1.0 do 12 x 20/32

A60M""""

A80M""""

38A60M""""

38A80M""""

SiC60""""

SiC80""""

order example F1 rubB 200x6x20 A60M6V

bond V, B

D Hand holdCuttinhg T

Stationary Hand holdGrinding T

115 1.2 3- 4 6-125 1.2 3- 4 6-180 1.6 3- 4 6 8- -230 1.9 3- 4 6 8- -300 3 5-350 3 3.5 4- -400 4500600

57

Otvor H2222222232

25 32 40- -4040 50-60

- 5 -

DxTxH150x20x20200x20x20250x25x25300x30x30350x40x127400x40x127450x50x150500x50x203600x63x203760x80x305

hole , by requestH20-2220-2225-3240-12740

127-150-152127-152-200-203

127-150-152-200-203127-150-152-203-305

305

thickness T

by request

"""""""""

50 m/s6370478038203180273023902120191015901300

63 m/s8020602048104010344030102670241020001650

D x T x H

Dimensions

150x20x20175x20x20200x20x20200x25x20250x25x25250x32x25

grit grade/Bond Redgrit grade/

White bondgrit grade/grit grade/

46M"""

60M"

60M"""

80M"

80M"""

46K""

60K""60K""

80K""80K""

46N""36P""

60M""46N""

80M""

60M""

60K"""""

80K"""""

100K"""""

46881112

555443

kg pcsDxTxH

Tool Steel Steel HRC 60

(F6 125 x 20)

39C38A38AA

180

D

80100125150

T

4050638080

H

2020

20(32)20(32)20(32)

W

6881020

E

1010131620

200250

D

100125150180

T

101013131620

H

20202020

20(32)25(32)

U

222334

J

406565100100130

STANDARD WHEEL SHAPES ISO525 for tool sharpening

200250

D

100125150180

T

688101314

H

20(32)20(32)20(32)20(32)20(32)25(32)

U

1.522333

J

40637585100125

300

D

150180200250

T

3632404050

H

20-3220-3220-3225-50.832-50.8

P

8090110150150

F

2020252530

F6

F3

F4

F5

F11

180

D

80100125150

T

3240405050

H

2020

20(32)20(32)20(32)

W

6881013

E J K

8 57 4610 71 5610 96 8113 114 9613 144 120

180

D

80100125150

T

1013131620

H

1320

20(32)3232

J=K

3136616676

W E min U

4 6 2.53333

5 76 78 910 11

F12

D

250250250300

T

14172228

H

32323232

U

3585

J P F

110 0 0110 100110 100 8110 90 15

100 3

Klinngeberg

Tip 1"

Tip 2"

J

D

H

T

U

H

E

T

W

D

U

D

H

J

T

DP

H

FT

DW

T

J

H

K

E

H

D

U

T

P

H

J

U

15º

F

T

J

U

H

K

D

W

TE

For order just specify: form (F), diameter (D) and hole (H) Example F6 D x H

- 4 -

REINFORCED WHEELS 80-100 m/sek FOUNDRY GRINDING WHEELS

WORKSHOP WHEELS for universal grinding, sharpening, turning and planing knives and bores

order example: F1 450x50x150 A16Q19B63

order example 200x20x20 38A60M6Vred 250x25x32 39C80K6V

Regular corundum wheel color is gray/blue for treated and non treated tool steel.-White corundum red bond hardness for hardened steel and- , "M" alloy steel HRC 60Silicon carbide green color, for HM - e.- tungsten karbid

For hand sharpening it is recommended to use one grade harder wheel (J K/L)

"A"

"38Ared"

"38A"

"39C"

SAW SHARPENING

rub B - bond V

F1B

U=1/3T65°

T

60°

0.5T

D E F

60° 60°

0.3T

A

order example 180x6x22 -A- for steel

bond Bf bond B, V.

bond V

rub A - bond B

F1 - with profiles

DxTxH Tool steel HSS steel HM-tungsten carbide125x1.0 do 12 x 20150x1.0 do 12 x 20175x1.0 do 12 x 20200x1.0 do 12 x 20250x1.0 do 12 x 20/32

A60M""""

A80M""""

38A60M""""

38A80M""""

SiC60""""

SiC80""""

order example F1 rubB 200x6x20 A60M6V

bond V, B

D Hand holdCuttinhg T

Stationary Hand holdGrinding T

115 1.2 3- 4 6-125 1.2 3- 4 6-180 1.6 3- 4 6 8- -230 1.9 3- 4 6 8- -300 3 5-350 3 3.5 4- -400 4500600

57

Otvor H2222222232

25 32 40- -4040 50-60

- 5 -

DxTxH150x20x20200x20x20250x25x25300x30x30350x40x127400x40x127450x50x150500x50x203600x63x203760x80x305

hole , by requestH20-2220-2225-3240-12740

127-150-152127-152-200-203

127-150-152-200-203127-150-152-203-305

305

thickness T

by request

"""""""""

50 m/s6370478038203180273023902120191015901300

63 m/s8020602048104010344030102670241020001650

D x T x H

Dimensions

150x20x20175x20x20200x20x20200x25x20250x25x25250x32x25

grit grade/Bond Redgrit grade/

White bondgrit grade/grit grade/

46M"""

60M"

60M"""

80M"

80M"""

46K""

60K""60K""

80K""80K""

46N""36P""

60M""46N""

80M""

60M""

60K"""""

80K"""""

100K"""""

46881112

555443

kg pcsDxTxH

Tool Steel Steel HRC 60

(F6 125 x 20)

F52A F52B F52C F52D F52IF52E F52H

F5

F1H

T

D

T

D

Dkom

Dtoc

D wheel = 2/3 to 4/5 D pcs

F16 F18 F19

Hole HStandard for Tolerances ( ) mmT=tolerance

Diameter D TD Thickness T TT TH5-1616-5050-160160-250

5.0350-760150-300 3.2 0.16

0.190.250.290.32

1.52.03.5

H

F52A F52B F52C F52D F52IF52E F52H

F5

F1H

T

D

T

D

Dkom

Dtoc

D wheel = 2/3 to 4/5 D pcs

F16 F18 F19

Hole HStandard for Tolerances ( ) mmT=tolerance

Diameter D TD Thickness T TT TH5-1616-5050-160160-250

5.0350-760150-300 3.2 0.16

0.190.250.290.32

1.52.03.5

H

11460 BEOGRAD (Barajevo)

IND. ZONA LIPOVICA29. Novembra 1E Telefon/Fax.:

www.gtocila.co.yu ginic@eunet.rs011 8326002

The position of “GT” in the European market.

“GT”

We cannot say that we are the best, but for the majority ofproducts few firms are better than us

Why is it to b y our products

tand

- We do sale KNOW-HOW as well.

.

recommended u ?- The quality of grinding wheels is on a par with the Europeanquality ( and we are always ready to prove it)- The prices are lower than for similar European products.- The widest assortment of whetstones: all shapes, sizes andbond types (V, B, Bf, R).- Permanent quality and fast delivery thanks to the state-of -art technology and machinery.- Wheels are produced in accordance with the strictes ISOEN norms from the best quality raw materials.- The management and production personnel withinternational experience guarantee quality and highbusiness standard of the firm.

All this enabled the firm, originally a workshop, to turninto a modern factory.

AERODROM

NIŠ

ČAČAK

RUŠANJ

KRUŽNI PUT

DUNAV

SAJMIŠTE

SAVA

PETLOVOBRDO

ZAGREB

KRUŽNIPUT

RIPANJ

ORLOVAČA

0km

10km

20km