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Which outcome occurs when exceeding the grinding wheel's friability limit during CBN grinding of hardened steel?

A)Increased workpiece surface roughness
B)Reduced wheel wear and damage
C)Improved coolant flow and cooling
D)Decreased cycle time for grinding

💡 Explanation

Exceeding friability causes excessive grain fracture because the bond cannot retain abrasive particles against cutting forces, therefore increasing workpiece roughness rather than achieving a smooth finish due to constantly exposing new, coarse cutting edges.

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