Center Punch
A punch having a sharp point, for marking the center of work swung in a lathe, so that it may readily be removed and replaced without the trouble of finding the center each time.
How to true a balance, repair a chipped dial, temper a spring or test a stone — the working bench-book of the American watch trade, arranged A to Z.
A punch having a sharp point, for marking the center of work swung in a lathe, so that it may readily be removed and replaced without the trouble of finding the center each time.