Brinell hardness number
Rockwell hardness number
Vickers pyramid number
letter of alphabet
hardness of the material being ground
speed of the wheel and work
condition of grinding machine
all of these
The grade of grinding wheel depends upon * hardness of the material being ground * speed of the wheel and work * condition of grinding machine
coarse grained
medium grained
fine grained
the soft grade grinding wheels are used for grinding soft materials
the soft grade grinding wheels are used for grinding hard materials
the hard grade grinding wheels are used for grinding hard materials
the hard grade grinding wheels are used for grinding soft materials
The dry condition is used to grind soft material
the dry condition is used to grind hard material
The wet condition is used to grind hard material
The wet condition is used to grind soft material.