spur gear

American  

noun

Machinery.

1. a gear having straight teeth cut on the rim parallel to the axis of rotation.

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spur gear British  

noun

1. a gear having involuted teeth either straight or helically cut on a cylindrical surface. Two such gears are used to transmit power between parallel shafts

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Etymology

Origin of spur gear

First recorded in 1815–25

Example Sentences

As for the engine, had it been a delicate watch, Tom could not have scrutinized each valve, wheel, cam and spur gear more carefully.

From Tom Swift and His Sky Racer, or, the Quickest Flight on Record by Appleton, Victor [pseud.]

Now a spur gear, as well as a pinion, has three diameters; one measurep.

From Practical Mechanics for Boys by Zerbe, James Slough

This spur gear is fast on a shaft c, which is capable of end motion and is provided on each of its side faces with an annular toothed clutch.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

The dynamo is placed in the center of the car, beneath the floor, and through intermediate spur gear drives by a steel chain on to one axle only.

From Scientific American Supplement, No. 388, June 9, 1883 by Various

The boiler was of cast-iron, with a one-cylinder engine, spur gear and a fly-wheel on one side.

From Lectures on Popular and Scientific Subjects by John Sutherland Sinclair, Earl of Caithness