MECHANICAL TERMS

Adjusting Screw—A screw for taking up wear, or for shifting the position of some movable piece.

Bushing—(1) A lining, usually of metal, for a hole. (2) A tube for insertion into an opening to reduce the effective diameter.

Cam—A non-circular or eccentric rotating piece, often of irregular outline and giving motion that is irregular in direction, rate, or time.

Clutch—A power-transmitting device operating by friction or interlocking, for securing or breaking rotative continuity, as between two shafts or a pulley and a shaft.

Collar—An annular enlargement of a shaft or axle, usually at or near the end.

Cotter Pin—A split pin for insertion in the slot of a bolt to prevent it being drawn.

Detent—A stop or checking device, as a pin, lever, etc.

Dowel—A pin or peg, usually cylindrical, for joining together two adjacent parts.

Escapement—A mechanical device used for securing a uniform movement.

Gear—Any set of appliances as of cog wheels, serving to transmit motion.

Gib—A wedge-shaped or other piece of metal that holds another in place or presses two pieces together.

Link—Any intermediate rod or piece for transmitting force or motion, especially a short connecting rod with a bearing at each end.

Pawl—A hinged or pivoted piece, having a point, edge, or hook made to engage with ratchet teeth, as for driving a rachet-wheel, or preventing reverse motion; a click, detent, or ratchet.

Pinion—A toothed wheel driving or driven by a large cog wheel.

Segment—A geared wheel, cam, or pulley, the outline or efficient working surface of which is a section of the whole circle.

Slide—A sliding part of a machine or implement.

Slideway—A lengthwise bearing on which a piece may slide.

Stud—(1) A pin having a large round head. (2) A short bolt having a shoulder.

Turnbuckle—A form of coupling so threaded or swiveled that when connecting lengthwise two metal rods, it may be turned so as to regulate the length or tension of the connected parts.