Round-nosed tool. A tool whose cutting edge is circular in its course or length.
Routing-machine. A machine using a revolving cutter to cut away some parts of a surface and leave the rest in relief.
Rust-joint. A joint that is made by being filled with cast-iron cuttings mixed with sal-ammoniac and sulphur to cause the cuttings to rust and form a solid body.
S
Safe-edge file. A file having no teeth upon one of its edges.
Sanding or sand-papering machine. A machine in which sand-paper-covered rollers or wheels are used for finishing wood-work.
Saw-arbor. The arbor or mandrel on which a circular saw is driven.
Saw-bench. A circular saw machine.
Saw-gummer. A machine for deepening the spaces between saw teeth.
Saw-packing. Plaited hemp that is packed on both sides of a circular saw to warm it and equalize its tension when it is running.