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Grinding wheel inquiry

For a grinding wheel inquiry, please use fill in the form at the bottom of this page

Standard grinding wheel markings

For clarity as well as to avoid mistakes in wheel selection, a standard designation of wheel specification was developed and was inscribed by ISO in 1965. Standards such as CNS of the R.O.C., JIS of Japan, ANSI of U.S.A. and DIN of West Germany all employ this uniform Standard.

A typical wheel marking includes the following information :

When ordering grinding wheels, specify your selection in this order:

1. Wheel Shape and Face

2. Dimensions: Diameter (D), Thickness (T), Hole Size (H)

3. Wheel Specifications: Type of Abrasive, Grit , Grade, Structure, Bond

 

WA

46

K

8

V

7N

Abrasive

Grit

Grade

Structure

Bond Type

KINIK Symbol

 

 

 

 

Abrasives

Bond Type

Symbols

Characteristics

Symbols

Characteristics

A

Regular aluminum oxide, hard and tough suitable for mild steel. Cast -iron etc. in rough grinding

V

(Vitrified)

Most common bond for precision grinding porosity and strength. Wheels made with this bond give high stock removal and their rigidity helps to attain high precision

Not affected by water, acid, oils or ordinary temperature variations.

10A

The prime regular aluminum oxide, hard and tough It is suited for cylindrical grinding of unhardened steels.

WA, 38A

White aluminum oxide, hard and brittle. Suitable for all kinds of steel grinding

32A

Strong sharp monocrystaline aluminum oxide Suitable for ail kinds of tool precision grounding

B

(Resinoid)

Used for wheels in fabrication shops, foundries, billet shops, sharpening and gumming saws, and in many precision applications These wheels excel in rapid stock removal as well as in applications requiring better finishes.

This bond is also restricted to reinforced resinoid products, cut-off wheels, or cut-off wheels, and for snagging with portable grinders

FA, 57A

Semi-friable, with a grinding action intermediate A and WA. Suitable for cylindrical grinding of steel sparts.

PA

Pink aluminum oxide, is suitable for tool grinding and surface grinding.

RA

Ruby aluminum oxide, hand and less brittle than PA. Suitable for high alloy steel etc, in precision grinding.

PSA

Special pink abrasive, simular to 32A.Suitable for all kinds of hard steels in precision grinding

R

(Rubber)

Used for most centerless feed wheels, precision ball race grinding wheels, and for snagging with portable grinders Used where finish is important and for cut-off wheels where burr and burn must be held to a minimum

AZ

A modified high zirconia aluminum oxide, used in foun-dries snagging cast iron and steels for heavy duty work

C

Black silicon carbide. Used for grinding gray iron, non-ferrous metals and nonmetallic materials such as glass, rubber, stones etc

Mg

(Magnesia Oxychloride)

A notable bond used for cutlery or particularly thin workpieces, marble surface grinding and super finishing.

GC

Green silicon carbide, is well suited for special alloygrinding such as tungsten carbide, cold-rolled steels,sapphire, glass, gem and granite.

Note :
Above abrasive may be used in combination to generate characteristics for particular applications.

Note:
The KINIK symbol designates a variation or modification of bond and other characteristics of the wheel.

 

Grades : Grade indicated the relative strength of the bond which holds the abrasive grains in place.

Very Soft

Soft

Medium

Hard

Very Hard

D.E.F.G.

H.I.J.K.

L.M.N.O.

P.Q.R.S.

T.U.V.W.X.Y.X.

 

Grits (CNS & JIS Standard)

Coarse

Medium

Fine

Very Fine

Ultra Fine

10 12 14

30 36 46

70 80 90 100

240 280 320 400

1000 1200 1500 2000

16 20 24

54 60

120 150 180 220

500 600 700 800

2500 3000 4000

 

Structures

Symbol

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Abrasive Ratio %

62

60

58

56

54

52

50

48

46

44

42

40

38

36

34

 

Standard wheel shapes

 

Shape 1

Shape 2

Shape 5

Shape 6

Shape 7

Shape 11

Shape 12

Shape 20

Shape 23

Shape 24

Shape 26

 

 

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Grinding wheel details