Choice of the quality of the grinding stones

 

Class

grits

colour

specification

A

Al. ox.

GREY-BLUE

current quality, for working on ordinary steel.

SA

Al. Al.

PINK

tenacious superior grit, good cut and shape maintaining capacity.

ASA

Al. Al.

PINK-GREY

mixture de «A» + «SA» which combines both qualities.

WA

Al. Al.

WHITE

for very hard and tempered steel.

WABL

Al. Al.

LIGHT BLUE

same as «WA» but particularly for surface grinding.

KR

Al. Al.

WHITE-GREY

monogrit, for grinding very hard alloys.

RU

Al. Al.

RUBY

for difficult alloys and certain special cast irons.

C

SiC

BLACK

for cast iron, materials, porcelain, synthetic materials,...

CV

SiC

GREEN

for grinding of tools in tungsten carbide (WIDIA).

SG

Cubitron

PINK

for superior hardness and difficult alloys such as titan.

Comparison table of our specifications with some of other manufacturers.

CENTRE ABRASIFS

TYROL.

NORT.

RAPP.

CARBOR.

A

10A

A

A

A

SA

88A

-

8A

RA

ASA

-

57A

3A

-

WA

89A

33A

7A

AA

WABL

-

-

-

-

KR

93A

-

9A

PA

RU

91A

25A

-

5A

C

1C

37C

1C

C

CV

C

39C

C

GC

Rotation speed

vitrified binder (V) = the most current one Max. 35 up to 50 m/sec
bakelite binder (Bak)                              Max.45 m/sec

NUMBER OF RPM

diameter
in mm

tangential speed in meters/second

45
m/sec

33
m/sec

35
m/sec

40
m/sec

50
m/sec

RPM

RPM

RPM

RPM

RPM

25

25.000

26.500

30.500

34.500

37.500

50

12.600

13.400

15.300

17.200

19.100

76

8.300

8.800

10.000

11.300

12.500

100

6.300

6.700

7.600

8.600

9.500

125

5.050

5.600

6.100

6.900

7.650

150

4.200

4.450

5.100

5.700

6.400

175

3.500

3.800

4.350

4.900

6.000

200

3.100

3.300

3.750

4.250

4.900

250

2.500

2.650

3.000

3.400

4.770

300

2.070

2.190

2.500

2.800

3.800

350

1.780

1.890

2.160

2.400

3.200

400

1.550

1.650

1.880

2.100

2.400

Specification
of the grinding stones

 

The specification of a grinding stone is in function of its constitutive elements, in the following order:

the type of abrasive, the size of the grit, the grade, the structure and the binder.

 

type of abrasive

grit

grade

structure

binder

A  

SA 

ASA         Aluminium oxide

WABL 

KR  

RU

24  

36  

46  

60  

80  

100

120 

G
H
I
J
K
L
M
N
O
P
Q
R
S

 

3 Close  

5  

8  

12  

16 Open

 

 

  v=vitrified

 

 Bak= bakelite

 

 

C
CV             Silicon carbide

Mounting: the bore of the grinding stone must be perfectly adapted to the diameter of the axe of the machine

Set of 2 nylon reducer bushings to reduce bores

Ø ext x Ø int.

ORDER No

Ø ext x Ø int.

ORDER No

Ø ext x Ø int.

ORDER No

Ø ext x Ø int.

ORDER No

20 x 12,7 mm

M 00/201

20 x 15 mm

M 00/215

32 x 22 mm

M 00/322

25 x 13 mm

M 00/713

20 x 8 mm

M 00/208

20 x 16 mm

M 00/216

32 x 25 mm

M 00/325

25 x 15 mm

M 00/715

20 x 10 mm

M 00/210

20 x 17 mm

M 00/217

32 x 25,4 mm

M 00/326

25 x 16 mm

M 00/716

20 x 12 mm

M 00/212

20 x 18 mm

M 00/218

51 x 32 mm

M 00/532

25 x 20 mm

M 00/720

20 x 13 mm

M 00/213

32 x 20 mm

M 00/320

51 x 38 mm

M 00/538

25 x 22 mm

M 00/722

20 x 14 mm

M 00/214

 

 

 

 

 

 

 

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