Grinding wheel selection: grain size vs material hardness Evaluate the statement: “A fine-grained grinding wheel is used to grind hard materials.” Choose the correct option.
Mechanical Engineering
Production Engineering
Difficulty: Easy
Choose an option
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ATrue — fine grain is preferred for hard materials
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BFalse — coarse grain is preferred for hard materials
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CTrue only for soft wheels
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DFalse; grain size is unrelated to hardness
Answer
Correct Answer: True — fine grain is preferred for hard materials
Explanation
GuidelineFor hard materials, a softer grade wheel with finer grain is typically used to maintain sharp cutting points and achieve good finish without excessive loading.
ContrastFor soft/tough materials, coarser grains help prevent wheel loading and allow higher material removal.
Final AnswerTrue — fine-grained wheel is used for hard materials.