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The gear drive (pinion) on a starter motor.

Related Terms

A.G.M.A.

Abbreviation for 'American Gear Manufacturers Associations', an organization serving the gear industry.

FATIGUE PLATELETS

Normal particles between 20 and 40 microns found in gear box and rolling element bearing oil samples observed by analytical ferrography. A sudden increase in the size and quantity of these particles indicates excessive wear.

FATIGUE CHUNKS

Thick three-dimensional particles exceeding 50 microns indicating severe wear of gear teeth.

HYPOID GEAR LUBRICANT

A gear lubricant having extreme pressure characteristics for use with a hypoid type of gear as in the differential of an automobile.

GALLING

A form of wear in which seizing or tearing of the gear or bearing surface occurs.

VISCOSITY GRADE

Any of a number of systems which characterize lubricants according to viscosity for particular applications, such as industrial oils, gear oils, automotive engine oils, automotive gear oils, and aircraft piston engine oils.

GEAR

1. A teethed wheel which transfers rotating motion by engaging with another gera. 2. A general term for ropes, blocks, tackle and other equipment.

PINION

The smaller of two mating or meshing gears; can be either the driving or the driven gear.

BACKLASH

1. The amount which a gear or other part of a machine, instrument, etc., can be moved without moving an adjoining part, resulting from loose fit. 2. The tangle resulting when a reel of line or cable revolves faster than line is being stripped off.

RUDDER STOCK

A vertical rudder shaft that connects to the steering gear
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