70 mm Hub Diameter Sprockets

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8 Products

About Roller Chain and Sprockets

About Gears

Designed to meet ISO 606 and DIN 8187 international dimensional standards, these sprockets are for use with compatible ISO and DIN roller chain. They come machined to the shaft diameter size listed and are machinable up to the maximum shaft diameter size.

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

For ISO 06B Roller Chain (9.53 mm Pitch)
Number of Teeth	For Shaft Dia., mm	For Max. Shaft Dia., mm	OD, mm	Overall Wd., mm	Hub Dia., mm	Material	Specifications Met		Each
40	16	45	126.96	30	70	Steel	DIN 8187, ISO 606	00000000	000000
For ISO 08B Roller Chain (12.7 mm Pitch)
21	12	45	91.95	28	70	Steel	DIN 8187, ISO 606	0000000	00000
For ISO 12B Roller Chain (19.05 mm Pitch)
15	12	45	103.37	35	70	Steel	DIN 8187, ISO 606	00000000	00000

Sprockets for Double-Strand Metric Roller Chain

The double row of teeth on these sprockets are designed to fit into metric ISO double-strand roller chain. They have an unfinished bore that’s machined to the shaft diameter size listed. Machine them to fit any shaft up to the maximum shaft diameter size. The extended hub makes these sprockets more stable and more durable than flat sprockets. They meet ISO 606 (formerly DIN 8187), which is an international standard for sprocket and roller chain dimensions and materials.

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

For ISO 06B-2 Roller Chain (9.53 mm Pitch)
Number of Teeth	For Shaft Dia., mm	For Max. Shaft Dia., mm	OD, mm	Overall Wd., mm	Hub Dia., mm	Material	Specifications Met		Each
27	12	45	87.6	30	70	Steel	DIN 8187, ISO 606	00000000	0000000
For ISO 08B-2 Roller Chain (12.7 mm Pitch)
21	16	45	92.58	40	70	Steel	DIN 8187, ISO 606	00000000	000000

Taper-Lock Bushing-Bore Sprockets for Metric Roller Chain

While their teeth fit into metric ISO roller chain, these sprockets use taper-lock bushings to grip shafts. That means you can switch to a different diameter shaft by changing the bushing instead of machining the sprocket. Bushings mount flush inside these sprockets; secure them in place by tightening the set screws included with the bushings. These sprockets have an extended hub that makes them more stable and durable than flat sprockets. All meet ISO 606 (formerly DIN 8187), which is an international standard for sprocket and roller chain dimensions and materials.

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

For Single-Strand Roller Chain

For ISO 08B Roller Chain (12.7 mm Pitch)
Number of Teeth	For Bushing Style	OD, mm	Overall Wd., mm	Hub Dia., mm	Teeth Heat Treatment	Material	Specifications Met		Each
21	1610	91.95	25	70	Hardened	Steel	DIN 8187, ISO 606	00000000	000000

Metal Bevel Gears

Gear and Pinion Sold Separately

Gear

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°	5:1	60	150	151	40	20	50	70	20	Black-Oxide 1045 Carbon Steel	00000000	0000000

Metric Shaft-Mounted Pinions

								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