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"Easy" Gear Selection Screen

- Choose a gear by pitch, # of teeth, or bore size.
- 2D/3D Drawings Available
- PDF Catalog Available
- Strength Calculation Available

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Pinion Gear

Definition of Pinion Gear

Generally, when meshing pair of gears, the smaller gear is called a pinion gear. Also, it refers to the cylindrical gear that meshes with a rack in a rack-and-pinion mechanism which transforms rotational motion to linear motion.

pinion gear 1 pinion gear 2

Regarding undercut

Undercut occurs during gear cutting when, for example, the number of teeth on the pinion is less than 17 (with 20-degree pressure angle), the root of the gear teeth are gouged. Generally, in these cases, the undercut can be avoided by profile shifting the gear in the positive direction.

Regarding rack and pinion

The pinion side of the rack and pinion combination has a higher frequency of the gear mesh. Therefore, in selecting the material and heat treating method, the pinion should have a higher hardness than the rack to lessen the tendency to wear faster.

Related links :
Rack and Pinion

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