What the label of Grind Wheel stands for?

- Jun 04, 2018 -

What the Label of Grinding Wheel Stands for?


Grinding Wheel Label Code

While picking a grinding wheel for designated texture, demanded roughness, defined efficiency, and limited cost, if you have the required knowledge, the label in the wheel face will help to quickly locate the right choice in front a wheel pool.

Take an example of the label below:

 SPA 400×100×127 A 60 L 5 B 35

Will be decoded into meaningful description:  

 SPA-----Shape code

 400------Outer Diameter

 100------Thickness

 127------Bore Diameter

 A---------Abrasive

 60--------Grain size

 L--------- Hardness

5---------Cluster code

B--------Binding agent

35-------limited linear speed in m/s



Abrasive code

Cat.

Name

 Code

Color

Characters

Application

Oxides

Brown Corundum

A

Brown

Low cost,

High tenacity,

Good hardness

Carbon steel,Alloyed steel,

Malleable cast iron,

Bronze

White Corundum

WA

White

Fragile, Good Hardness


Quenched Steel,

High-speed Steel

Chrome Corundum

PA

Rosy or Purplish

High tenacity,EfficientIve,Low comsumption

High clean quenched steel

Carbides

Black Silicon Carbide

C

Black

Fragile,Sharp

Good thermal conductivity

Cast steel,

Brass

Aluminum

Non-Metal


Green Silicon Carbide

GC

Green

Fragile,Hard,Good thermal conductivity

Hard alloy,

Gem,

Ceramic,

Glass

Boron Carbide

BC

Black

Good heat resistance

Gem and Jade

Super-hard

Synthetic Diamond


colorless,Pale-yellow,Black

High hard,

Brittle

Hard material,

Optical lens

Cubic Boron Nitride

NBC

Black or Light white

Durable,

Good tenacity

Hard alloy, Inox


⊙Synthetic Diamond consists of RVD.MBD.SCD.SMD.DMD



Grain Size


Cat.

Grain type

Size (micron)

Cat.

Grain type

Size (micron)

Grinding grain

8#

2500~3150

Grinding grain

150#

80~100

10#

2000~2500

180#

63~80

12#

1600~2000

220#

50~63

14#

1250~1600

240#

40`50

16#

1000~1250

powder

W40

28~40

20#

800~1000

W28

20~28

24#

630~800

W20

14~20

30#

500~630

W14

10~14

36#

400~500

W10

7~10

46#

315~400

W7

5~7

60#

250~315

W5

3.5~5

70#

200~250

W3.5

2.5~3.5

80#

160~200

W2.5

1.5~2.5

100#

125~160

W1.5

1.0~1.5

120#

100~125

W1.0

0.51.0



Structure Code


Structure code stands for the density of abrasive

Structure

Dense

Medium

Loose

Code

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Content rate of Abrasive (%)

62

60

58

56

54

52

50

48

46

44

42

40

38

36

34



Binding agent


Category

Code

Properties

Application

Ceramic

V

Resist to water,acid,alkali,heat;

     Lean to unclogging;

     Low cost;

     Limited linear speed:35m/s

Grinding/Cutting

Resin

B

     Tenacious and elastic;

     Erodible and thermalable;

     Storage life less than 1 year.


Grinding/Cutting/Polishing

Ruber

R

      Tenaciou and elastic;

      Resist to shock;

      Not resist to oil;

Polishing/Grinding

Magnesia

Mg

      Good self-sharpening

      Produce less heat


Grinding large-surface-area;

Grinding poor-heat-conductivity


Hardness


Grade of Hardness

Code

Primary Grade

Secondary Grade

Ultra soft

Ultra soft

D.E.F.

soft

Soft 1

G

Soft 2

H

Soft 3

J

Medium soft

Medium Soft 1

K

Medium Soft 2

L

Medium

Medium 1

M

Medium 2

N

Medium Hard

Medium Hard 1

P

Medium Hard 2

Q

Medium Hard 3

R

Hard

Hard 1

S

Hard 2

T

Ultra hard

Ultra hard

Y