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Abrasives Cutting Grinding Wheel

Abrasives cutting grinding wheel

1.Wheel type and center shape
41 = cut-off wheel, flat center  
42 =cut-off wheel depressed center
27 =Grinding wheel, depressed center
2. Abrasive type
A=Brown Aluminium oxide    
WA=White Aluminium oxide           
A.C.                
A.WA               
RA
MA
C=Black Silicon carbide         
GC=Green Silicon Carbide                   
AZ=Alumina-zirconia
SD
CBN
CM
MG

3. Grit size
Coarse: 20# 24#
Medium: 30#, 36# 46#, 60#
Fine: 70#, 80#, 100#,120#, 180#

4.Hardness  
Soft: M.N.
Medium: P.Q.R.
Hard:   S.T.
5. /

CUTTING WHEEL
CARBON STEEL                   A24-36Q
(50-75MM) CARBON STEEL   A24-36P, A24-36M
STAINLESS STEEL                AWAP
COPPER                                 C30N
BRASS                                  A24R
BRICK                                     C24-30Q
STONE                                   C30P

GRINDING WHEEL
REGULAR STEEL              A24. 30 Q.R.
STAINLESS STEEL            WA36M.N
CAST STEEL                      AC24.30P.Q
ALUMINUM                         C30.36N.P
COPPER                             C36M
CONCRETE BRICK            C36M
GLASS & STONE                GC36-46M.N.

6. Maximum operating speed
R.P.M.= Revolutions Per Minute
In m/s 72, 80, 100
mm        72m/s (R.P.M.)          80m/s (R.P.M.)         100m/s (R.P.M.)
50                                            30850                      38180
76                                             20100                        25130
100        13700                        15200                        19000
115        11900                        13300                       16100
125        11000                       12200                        15250
150        9100                          10200                        12750
180        7600                         8500                          10625
200        6800                        7640                          9550
230        5950                          6600                          8250
255        5370                          6000                          7500
305        4600                          5100                          6370
355        3900                          4400                          5500
405        3400                          3800                          4750
500        2820                          3055                          3820