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According to ISO-525
standard there are seven symbols which should be
arranged for the designation of grinding wheels
specifications as follow:
1- Type of abrasive , manufacturers own (optional)
2- Nature of abrasive
3- Grain size
4- Grade
5- Structure (optional)
6- Nature of bond
7- Type of bond, manufacturers own (optional)
The standard symbols which are using for grinding
wheels producer are
given in the below:
|
40A |
60 |
K |
7 |
V |
A1 |
|
Abrasive type |
Grain size |
Grade |
Structure |
Bond |
|
|
A
Al2O3
SC
SiC
CB
CBN
D
Diamond
ZD
Zirconium |
8-12
very coarse
14-24
coarse
30-60
medium
80-150
fine
180-240
very fine |
D-F
very soft
G-Jt
soft
K-N
medium
O-R
hard
S-W
very hard |
1-3
dense
4-7
medium
8-10
porous
11-14
open
|
V
vitrified
B
resin
M
metal
R
rubber
E
shellac |
Factory number
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