A mounting flange prevents movement during tightening, so it's easy to center these bushings in your sprocket. They are also good for shock loads. When you tighten the included screws, the bushing's inner sleeve contracts onto the shaft and the outer sleeve expands to hold your sprocket, pulley, or gear. They can be mounted on shafts with or without keyways.

For Shaft Dia.	OD	Overall Wd.	Max. Torque, in.-lbs.	Fastener Tightening Torque, in.-lbs.	Material	Includes		Each
35mm	57mm	38mm	6,000	150	Steel	Clamping Screws	0000000	000000

XL Series Corrosion-Resistant Timing Belt Pulleys

With Hub—Two Flanges

Pulleys are anodized aluminum, which is more corrosion resistant than steel. They are XL series (extra light) and have trapezoidal teeth. Select a pulley with a maximum belt width that’s the same or larger than your timing belt width.

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

Metric—Press-Fit Mount with Set Screw

With Hub—Two Flanges

For 9.5 mm Max. Belt Wd.
OD, mm	Number of Teeth	Pitch, mm	For Shaft Dia., mm	Bore Type	Inside Wd., mm	Outside Wd., mm	Overall Wd., mm	Pitch Dia., mm	Fabrication	Material	Hub Dia., mm		Each
With Hub—Two Flanges
57	32	5.080	8	Finished	10.9	14.3	25.4	51.7	Machined	Anodized Aluminum	36	00000000	000000
57	32	5.080	12	Finished	10.9	14.3	25.4	51.7	Machined	Anodized Aluminum	36	00000000	00000

XL Series Lightweight Timing Belt Pulleys

Acetal and aluminum construction makes these pulleys useful in weight-sensitive applications. All are XL series (extra light) and have trapezoidal teeth. Select a pulley with a maximum belt width that’s the same or larger than your timing belt width.

Press-Fit Mount with Set Screw

With Two Flanges

												Hub
OD	Number of Teeth	Pitch	For Shaft Dia.	Bore Type	Inside Wd.	Outside Wd.	Overall Wd.	Pitch Dia.	Number of Flanges	Fabrication	Material	Material	Dia.		Each
For 3/8" Max. Belt Wd.
Metric
57mm	32	5.000mm	10mm	Finished	13mm	16mm	22mm	51.74mm	2	Molded	Acetal	Aluminum	13mm	0000000	000000

Metal Gears and Gear Racks—20° Pressure Angle

The current industry standard, these 20° pressure angle gears have thicker, stronger teeth than 14½° pressure angle gears. Compared to plastic gears and racks, they’re better for high-load, high-speed, and heavy duty applications. Also known as spur gears.

Combine gears with different numbers of teeth to change speed and torque in your assembly. Combine a gear and rack to convert rotary motion into linear motion. To minimize your footprint, mount one or more standard gears inside of an internal gear.

For components to mesh correctly, they must have the same pressure angle and pitch/module.

Carbon steel components have hard, strong, and wear-resistant teeth, although they will rust when exposed to moisture and corrosive chemicals. They're best for high-torque machines, like lifting equipment, and heavy duty applications, such as rock crushing. Gears with teeth that are not hardened can be hardened to fit your application.

Stainless steel gears and racks resist rust in damp and wet environments, so they're commonly used in food-processing plants and other areas with frequent cleaning.

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

Metric Gears

Gear with Round Bore

Gear with Round Bore and Set Screw

Gear with Keyed Bore and Set Screw

									Hub			Keyway
Module	Number of Teeth	Gear Pitch Dia., mm	OD, mm	Face Wd., mm	Overall Wd., mm	For Shaft Dia., mm	Material	Teeth Heat Treatment	Dia., mm	Wd., mm	Set Screw Thread Size	Wd., mm	Dp., mm		Each
Round Bore
1	55	55	57	10	20	10	Black-Oxide 1045 Carbon Steel	Not Hardened	35	10	__	__	__	00000000	000000
1	55	55	57	10	20	10	303 Stainless Steel	Not Hardened	40	10	__	__	__	00000000	00000
1.5	36	54	57	15	29	10	303 Stainless Steel	Not Hardened	45	14	__	__	__	00000000	00000
Round Bore with Set Screw
0.8	70	56	57	8	16	6	Black-Oxide 1045 Carbon Steel	Not Hardened	28	8	M4	__	__	00000000	00000
Keyed Bore with Set Screw
1.5	36	54	57	15	25	12	1045 Carbon Steel	Not Hardened	40	10	M4	4	1.8	0000000	00000

High-Power Metal Gears

Standard Gear on Gear Rack (Sold Separately)

Gear with Round Bore

The helical teeth on these gears stay in contact for longer than straight teeth, which allows them to transmit higher loads at higher speeds than spur gears.

For gears to mesh correctly, they must have the same pressure angle and pitch. All of these gears transmit motion in a straight line—make sure to get one left-hand and one right-hand gear. To change speed and torque in your assembly, pair two gears with different numbers of teeth.

Standard helical components have a 21 1/2° helix angle so they only transmit motion in a straight line since the helix angle is so small. Made from alloy steel, these gears resist abrasion and are stronger than carbon steel gears. Their teeth are ground, so they're more precise than gears with rolled teeth. Pair them with a rack or a gear that has a different tooth direction.

Gears with hardened teeth have better wear resistance than gears with teeth that are not hardened.

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

Metric Standard Gears—20° Pressure Angle

									Hub
Module	Number of Teeth	Helix Angle	Gear Pitch Dia., mm	OD, mm	Face Wd., mm	Overall Wd., mm	For Shaft Dia., mm	Teeth Heat Treatment	Dia., mm	Wd., mm		Each
Left Hand
Round Bore—4140 Alloy Steel
1.5	36	21 1/2°	54	57	12	24	15	Hardened	45	12	00000000	0000000
Right Hand
Round Bore—4140 Alloy Steel
1.5	36	21 1/2°	54	57	12	24	15	Hardened	45	12	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. 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
8	1.25	20°	3:1	45	56	57	15	10	21	34	6	Black-Oxide 1045 Carbon Steel	00000000	000000
9	1.25	20°	5:2	45	56	57	19	10	26	34	10	Black-Oxide 1045 Carbon Steel	00000000	00000

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
8	1.25	20°	3:1	15	19	22	16	8	36	15	7	Black-Oxide 1045 Carbon Steel	00000000	000000
9	1.25	20°	5:2	18	23	26	21	8	40	19	11	Black-Oxide 1045 Carbon Steel	00000000	00000

Plastic Gears and Gear Racks—20° Pressure Angle

The current industry standard, these 20° pressure angle gears have thicker, stronger teeth than 14½° pressure angle gears. Made of plastic, they run quieter than metal gears and have good corrosion and chemical resistance. They’re also known as spur gears.

Combine gears with different numbers of teeth to change speed and torque in your assembly. Combine a gear and rack to convert rotary motion into linear motion.

For components to mesh correctly, they must have the same pressure angle and pitch/module.

Nylon gears can be operated without lubrication, so they’re commonly used in food-processing machines.

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

Metric Gears

Round Bore

										Hub
Module	Number of Teeth	Gear Pitch Dia., mm	OD, mm	Face Wd., mm	Overall Wd., mm	For Shaft Dia., mm	Material	Fabrication	Color	Dia., mm	Wd., mm		Each
Round Bore
1	55	55	57	10	20	10	Nylon Plastic	Machined	Blue	35	10	00000000	000000
1.5	36	54	57	15	25	8	Nylon Plastic	Machined	Blue	45	10	00000000	00000

17 Products

About Gears

Self-Centering Screw-Clamp Bushings

XL Series Corrosion-Resistant Timing Belt Pulleys

XL Series Lightweight Timing Belt Pulleys

Metal Gears and Gear Racks—20° Pressure Angle

High-Power Metal Gears

Metal Bevel Gears

Plastic Gears and Gear Racks—20° Pressure Angle