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Lathe lead screw thread selection In a standard engine lathe, the lead screw typically uses which type of thread start configuration? Choose the correct option.

Difficulty: Easy

Single-start
Double-start
Multi-start (3 or more)
Any of the above are equally common

Correct Answer: Single-start

Explanation:

Reasoning
The lead screw must transmit motion accurately and robustly to the carriage for thread cutting; single-start (often square/Acme form) provides strength and a precise, predictable lead.

Contrast
Multi-start threads are used for quick traverse/feed screws, not typically for the lead screw.

Final Answer
Single-start.

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