Slide-valve. The valve that governs the admission of steam into and its exhaust out of a cylinder.
Slot. A rectangular passage or hole passing entirely through the material.
Slotting-machine. A machine having a vertical bar or ram that carries the cutting tool on its lower end and has a vertical reciprocating motion.
Smooth-file. The finest cut of file that is made for ordinary use.
Smoothing-plane. A carpenter’s short plane for producing a smooth surface.
Socket. A piece that is hollow and receives another.
Socket-wrench. A wrench that envelops the whole of the head of a bolt.
Solid milled cutters. Cutters for woodwork, in which an irregular shaped cutting edge is obtained by recesses cut in the flat face of the cutter.
Space or spaces. The opening between the teeth of gear wheels.
Spanner. A form of wrench.