In which of the following operations
on lathe, will the spindle speed beminimum?
Knurling
Fine finishing
Taper turning
Thread cutting
Thread cutting
Thread cutting on the lathe is a
process that produces a helical ridge of uniform section on the workpiece. This
is performed by taking successive cuts with a threading tool-bit the same shape
as the thread from required, hence to protect the ridges from damage. This
process is carried out slowly
Hence, the correct option is (D)
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