Side-chisel. A machinist’s chisel shaped to cut on the sides of slots or keyways, and having its cutting edge on one side of the end facet.
Side-tool. A tool used to cut the ends of lathe work that is held between the lathe centres.
Single-geared lathe. A lathe in which there is no back gear.
Single-riveted joint. A joint having but one row of rivets in a lap joint and one row of rivets on each side of the plate joint in a butt joint.
Single-thread. A screw thread having a single spiral.
Skew-bevel. A bevel gear wheel in which the teeth sides do not form lines radiating from the wheel centre, but point to one side of it.
Skew-chisel. A carpenter’s chisel in which the cutting edge is not at a right angle to the body of the tool.
Skew-cutter. A cutter in which the cutting edge does not stand parallel to the axis of the shaft that drives it.
Slab. 1. A rough square piece of iron forged from scrap. 2. The first piece cut from the side of a log of wood.
Sleeve. An enveloping piece that is usually cylindrical and too long to be termed a ring.