(1) Non-rotating plate carrying the shoes of a drum brake. (2) Metal member carrying friction material of the disc brake pad.

The pressure build-up in the exhaust caused by the resistance to exhaust flow by pipe diameters and muffler baffles. Used in design to balance an exhaust to an engine.

Technique of sanding a surface to taper the paint film away from the metal repaired area.

Combustion of fuel in the intake or exhaust resulting in a loud explosive noise.

The base material of flatting paper onto which abrasive grains are coated. For masking tape, the backing is the paper section without the adhesive.

A supporting pad for abrasive disc and/or polishing pads that is attached to a polishing mop or a DA sander. In the compounding, glazing or polishing operation, a foam or wool polishing or glazing pad is attached on top of the backup pad. In dry sanding operations an abrasive disc is attached to the face of the pad.

The clearance between two components, usually used to measure the running clearance of gear teeth.

A second copy of work in case the original is damaged or destroyed. Should be stored away from the computer.

A part fitted behind the air cap in a spray gun to direct the air stream and reduce air turbulence.

Application of heat to cure and dry a coating. In automotive refinishing, baking is used to speed up the drying of air-drying finishes and is sometimes called force-drying. The metal temperature in refinish baking usually does not exceed 80°C (180°F).