Expression method of super-hard grinding wheel
 
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.Expression method of indication
Type of abrasive material #Grain sizeJIS6002-63 Combination (hardness) Concentration(thickness) Binder Thickness of grinding layer
ND:Natural diamond
SD:Synthesized diamond
SDC:Metal covered with
synthesized diamond
CBN:Cubic Boron Nitride
CBNC:Metal covered with CBN
(Can be expressed by B)
36 240 1000
46 280 1500
60 320 2000
70 400 2500
80 500 3000
100 600 4000
120 700 5000
150 800 8000
180 1000 15000
ND  
NC soft
NA  
RE  
RC
RA  
RS  
RP  
RNA Middle
RN  
RL  
PK  
PN
PH  
RH  
RI hard
RJ  
RV  
25 low
50  
75
100  
125  
150
175  
200 High
B:Resin
V:Ceramics
M:Metal
P:Electroplate
2.50mm
3.50mm
5.50mm
10.50mm