The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding _______________ grinding wheel is normally used ?
Correct answer: B. Aluminium oxide
- A. Hard
- B. Aluminium oxide
- C. Silicon carbide
- D. Soft
Explanation
Aluminium oxide wheels are tough and retain their abrasive grains well, making them suitable for general-purpose grinding of high-speed-steel cutters. Silicon carbide is preferred mainly for hard, brittle or non-ferrous materials such as carbide tools.
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