Shaper

A large tool for surfacing off material, cutting grooves, and the like.

Shrinkage

The term applied to metals when cast, as all will be smaller when cold than when cast in the mold.

Slide rest

The part of the lathe which holds the tool post.

Sonorous

Having the quality of vibration.

Slotted

Grooved, or channeled.

Solvent

That which can be changed from a solid by liquids.

Spelter

A combination of zinc and copper. A hard solder.

Soldering

Uniting of two substances by a third, with heat.

Spindle

A small shaft.

Spur

The larger of two intermeshing gears.

Socket

A depression or hole.

Sprocket

Teeth in a wheel to receive a chain.

Spiral

A form wound like the threads of a screw.

Surface plate

A true surface made of metal, used as a means of determining evenness of the article made.

Sulphate

Any substance which is modified by sulphuric acid.

Substitute

An element or substance used for another.

Superposed

One placed above the other.

Swage

Tool for the purpose of changing the form in a material.

Swivel

A point on which another turns.

Surfacing

Taking off the outer coating or covering.

Tap

A small drill.

Tapering

An object with the sides out of parallel.

Tangential

A line from the periphery of a circle which projects out at an angle.

Tension

The exertion of a force.

Tenacity

The property of a material to hang together.

Tempering

Putting metal in such condition that it will be not only hard but tough as well.

Technical

Pertaining to the strict forms and terms of an art.

Texture

That of which the element or substance is composed.

Threads

The ridges, spiral in form, which run around a bolt.

Theoretically

The speculative form or belief in a subject.

Tinned

The term applied to the coating on a soldering iron with a fluxed metal.

Tines

Small blades.

Torsion

The force exerted around an object, like the action of a crank on a shaft.

Tommy

A lever to be inserted in a hole in a screw head for turning a screw.

Transmitting

Sending forth; to forward.

Trammel

A tool for the purpose of drawing ellipses.

Traction

Drawing; pulling power.

Tripping

A motion applied to a finger, which holds a pivoted arm, whereby the latter may be swung from its locked position.

Triangular

Having three sides and three angles.

Transverse

Across; at right angles to the long direction.

Undercut

A wall of a groove or recess which is sloping.

Undulatory

A wave-like motion, applied generally to light and electricity.

Unit

A base for calculating from.

Unison

Acting together; as one.

Unsized

Generally applied to the natural condition of paper or fabric which has no glue or other fixing substance on it.

Vaporising

To change from a liquid or solid to a gas.

Variation

Changing into different conditions; unlike forms.

Verge

The edge; usually applied to the shoulder of a watch spindle, particularly to the escapement.

Vertical

Up and down. The direction of a plumb line.

Velocity

The speed of an article through space.

Vitascope

An instrument for determining the rate of vibration of different substances.

Vibration

The movement to and fro of all elements, and by means of which we are made sensitive of the different forces.

Vocation

The business or the calling of a person.

Warding

The act of cutting a projection or guard, such as is usually found on the insides of locks, and the correspondent detent in the key.

Watt

In electricity the unit of the rate of working in a circuit. It is the electro-motive force of one volt and the current intensity of one ampere.