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Mastering the Lathe and Milling Machine
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When cutting a thread on an engine lathe, what is the primary purpose of the chasing dial (thread dial)?
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Hint
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50-50
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👥
Audience
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A
To indicate when to engage the half-nut so the tool lands in the same groove on successive passes.
B
To measure the precise pitch diameter of the thread as it is being cut.
C
To automatically disengage the carriage feed at a preset position.
D
To adjust the rotational speed of the lead screw relative to the spindle speed.
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