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Which outcome occurs in hardened steel lathes due to prolonged use at increasingly high spindle speeds?

A)Excessive thermal expansion offset
B)Increased machine coolant viscosity
C)Workpiece material chemical breakdown
D)Reduced motor amperage requirement

💡 Explanation

Excessive thermal expansion offset occurs because prolonged high-speed use induces significant heat, and coefficient differences causes differential expansion via thermal conduction/convection. Therefore dimensional inaccuracy will be observed, rather than issues with coolant, material integrity or motor performance.

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