A type of miter gear where one gear (sometimes called a pinion) is smaller than the other, bevel gears provide right-angle speed reduction at speed ratios ranging from 2:1 to 5:1. All are carbon steel for strength; they're compatible with plastic bevel gears. Teeth are not hardened so you can harden them to fit your application. Hardening a gear’s teeth increases its wear resistance.

A complete set consists of a gear and pinion (sold separately). For a gear and pinion to mesh correctly, they must have the same pressure angle, pitch/module, and face width. Shaft-mounted pinions come already securely fastened to a shaft.

Speed ratio is the ratio by which shaft speed is reduced when transferring motion from pinion to gear. To increase shaft speed, transfer motion from gear to pinion. Changing shaft speed also changes torque: as speed decreases, torque increases.

For technical drawings and 3-D models, click on a part number.

Metric Gears

										Hub
Face Wd., mm	Module	Pressure Angle	Speed Ratio	Number of Teeth	Gear Pitch Dia., mm	OD, mm	Overall Wd., mm	For Shaft Dia., mm	Mounting Distance (A), mm	Dia., mm	Wd., mm	Material		Each
Round Bore
20	2.5	20°	4:1	60	150	151	40	20	53	70	20	Black-Oxide 1045 Carbon Steel	00000000	0000000
20	2.5	20°	5:1	60	150	151	40	20	50	70	20	Black-Oxide 1045 Carbon Steel	00000000	000000

Metric Pinions

Pinion

										Hub
Face Wd., mm	Module	Pressure Angle	Speed Ratio	Number of Teeth	Gear Pitch Dia., mm	OD, mm	Overall Wd., mm	For Shaft Dia., mm	Mounting Distance (B), mm	Dia., mm	Wd., mm	Material		Each
Round Bore
20	2.5	20°	4:1	15	38	44	39	12	94	30	18	Black-Oxide 1045 Carbon Steel	00000000	000000

Metric Shaft-Mounted Pinions

Shaft-Mounted Pinion

								Shaft			Hub
Face Wd., mm	Module	Pressure Angle	Speed Ratio	Number of Teeth	Gear Pitch Dia., mm	OD, mm	Overall Wd., mm	Dia., mm	Lg., mm	Mounting Distance (B), mm	Dia., mm	Wd., mm	Material		Each
20	2.5	20°	5:1	12	30	37	143	20.2	115	83	25	8	Black-Oxide 1045 Carbon Steel	00000000	000000

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About Gears

Metal Bevel Gears