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← TechnologyWhich type of dimensional inaccuracy results when thermal gradients cause differential expansion in a CNC lathe's mechanical structure?
A)Tapering along the workpiece axis✓
B)Chatter during high-speed cutting
C)Barrelling of cylindrical surfaces
D)Workpiece surface micro-cracking
💡 Explanation
Tapering appears because differential thermal expansion causes carriage misalignment with the spindle centerline. This creates angular deviation therefore resulting in a tapered part rather than a cylinder. Chatter involves resonant frequencies; barrelling results from tool wear.
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