Live spindle. The revolving spindle of a lathe.
Loose. A term used to denote a part of a plate or saw that is not under tension.
Lost motion. Motion that is not transmitted on account of the looseness of the parts.
Lug. A small projection.
M
Machine-bolt. A bolt and nut of the sizes kept in stock by machinery dealers, the bolt usually being black or unturned.
Machine-screw. A small screw made to the Birmingham wire gauge.
Machine-tap. A long taper tap used in threading nuts in a machine.
Machine-tool. A machine that performs work by means of cutting tools.
Mandrel. 1. A cylindrical piece which is driven into hollow work and holds it while it is turned in the lathe. 2. A piece or bar on which work is driven or forced. 3. A shaft running in bearings.