A Guide to Bates Grade Markings

 

Abrasive

Grit Size Combination Grade Structure Bond Reinforcing Cloth
SA

Friable (white)

12
14
16
20
24
30
36
46
60
80
100
Nominal
.1
.2

.4

.5

Soft
G
H
I
Medium
J
K
L
M
N
O
P
Hard
Q
R
S
T
U
V
W
X
Y
Z

Dense
1
2

3

4

5

6

7

8

Open

9

10

11

12

13
ResinB
B7
B9
B11
B12
B15
Vitrified
V
VA
Rubber
R25
R50
F external cloth
P

Friable (pink)

F2B-2 internal cloth
A

Regular Aluminum Oxide

F1-1 internal cloth
AM

Semi Friable (Combination)

  F1H-1 internal plus 2 hub cloth
MA

Semi Friable (Combination)

   
T

Treated Aluminum Oxide

   
TA

Treated (Combination)

     
D

Aluminum Oxide

     
C

Silicon Carbide

     
CA

Silicon Carbide (Combination)

     
Z

Zirconia

     
ZA

Zirconia (Combination)

       
N

Norzon™

       
NA Norzon™ (Combination)        
AN

Norzon™ (Combination)

       
NC

Norzon™ (Combination)

         
CN

Norzon™ (Combination)

         
NT

Norzon™ (Combination)

         
NTS

Norzon™ (Combination)

         
TN

Norzon™ (Combination)

         
B

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