The grit size of the abrasives used in the grinding wheel is usually specified by the
Harness
number
Size
of the wheel
Softness
or harness of the abrasive
Mesh
number
Mesh
number
The
grit size of the abrasives used in grinding wheel is usually specified by its
mesh number.Grit size also called as grain size is specified by mesh number.
|
Grain
size number (GSN) |
Types
of grains |
|
10-24 |
Coarse
grains |
|
30-60 |
Medium
grains |
|
80-180 |
Fine
grains |
|
220-600 |
Very
fine grains |
Hence,
the correct option is (D).
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