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← TechnologyWhich outcome occurs when the tailstock quill on a CNC lathe lacks sufficient lubrication?
A)Thermal expansion of workpiece increases
B)Chatter during turning process worsens
C)Surface finish tolerance degrades✓
D)Cutting tool wear rate decreases
💡 Explanation
Insufficient lubrication results in increased friction, leading to stick-slip behavior between the quill and tailstock body; this causes inconsistent support during machining known as the stick-slip effect. Therefore, the dimensional accuracy and surface finish degrades rather than other processes being impacted in cutting conditions.
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