General Studies · Machining and Machine Tools
The formula to find the change gear ratio (Driver/Driven) to cut a thread on a lathe is ________.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1dr/dn = Pitch to be cut × 2 / lead screw pitch
- 2dr/dn = Pitch to be cut / lead screw pitch✓
- 3dr/dn = lead screw pitch / Pitch to be cut × 2
- 4dr/dn = Pitch to be cut / lead screw pitch × 2
Correct answer
dr/dn = Pitch to be cut / lead screw pitch
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