Definition of type characters taking 41 AS 60 PBF as an example
Labels
Definition of type characters
41
Tool shape
F 41 = Cutting discs,
flat
AS
Type of grain
AS = tempered aluminium
oxide
CS = tempered silicon
carbide
60
Size of grain
16 – 24 = coarse
30 – 60 = medium
70 – 220 = fine
P
Structure
1 – 3 = densel
4 – 5 = medium
6 – 8 = open
9 – 10 = very open
BF
Bond
BF = resin bonded
fibre glass
reinforced