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
14mm	28mm	24mm	640	42	Steel	Clamping Screws	0000000	000000
15mm	29mm	24mm	820	42	Steel	Clamping Screws	0000000	00000
16mm	30mm	24mm	900	42	Steel	Clamping Screws	0000000	00000
17mm	31mm	24mm	940	42	Steel	Clamping Screws	0000000	00000
18mm	32mm	24mm	990	42	Steel	Clamping Screws	0000000	00000
19mm	33mm	24mm	1,050	42	Steel	Clamping Screws	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	20	21 1/2°	30	33	12	24	12	Hardened	24	12	00000000	000000
1.5	22	21 1/2°	33	36	12	24	12	Hardened	26	12	00000000	000000
1.5	24	21 1/2°	36	39	12	24	12	Hardened	28	12	00000000	000000
1.5	25	21 1/2°	37	40.5	12	24	12	Hardened	30	12	00000000	000000
1.5	26	21 1/2°	39	42	12	24	12	Hardened	32	12	00000000	000000
1.5	28	21 1/2°	42	45	12	24	15	Hardened	36	12	00000000	000000
1.5	30	21 1/2°	45	48	12	24	15	Hardened	38	12	00000000	000000
1.5	32	21 1/2°	48	51	12	24	15	Hardened	40	12	00000000	000000
1.5	35	21 1/2°	52	55.5	12	24	15	Hardened	42	12	00000000	000000
1.5	36	21 1/2°	54	57	12	24	15	Hardened	45	12	00000000	000000
1.5	40	21 1/2°	60	63	12	24	15	Hardened	50	12	00000000	000000
1.5	44	21 1/2°	66	69	12	24	15	Hardened	50	12	00000000	000000
1.5	45	21 1/2°	67	70.5	12	24	18	Hardened	50	12	00000000	000000
1.5	48	21 1/2°	72	75	12	24	18	Hardened	50	12	00000000	000000
1.5	50	21 1/2°	75	78	12	24	18	Hardened	60	12	00000000	000000
1.5	52	21 1/2°	78	81	12	24	18	Hardened	60	12	00000000	000000
1.5	60	21 1/2°	90	93	12	24	20	Hardened	60	12	00000000	000000
1.5	70	21 1/2°	105	108	12	24	20	Hardened	60	12	00000000	000000
1.5	80	21 1/2°	120	123	12	24	20	Hardened	70	12	00000000	000000
1.5	90	21 1/2°	135	138	12	24	20	Hardened	70	12	00000000	000000
1.5	100	21 1/2°	150	153	12	24	20	Hardened	70	12	00000000	000000
Right Hand
Round Bore—4140 Alloy Steel
1.5	20	21 1/2°	30	33	12	24	12	Hardened	24	12	00000000	00000
1.5	22	21 1/2°	33	36	12	24	12	Hardened	26	12	00000000	000000
1.5	24	21 1/2°	36	39	12	24	12	Hardened	28	12	00000000	000000
1.5	25	21 1/2°	37	40.5	12	24	12	Hardened	30	12	00000000	000000
1.5	26	21 1/2°	39	42	12	24	12	Hardened	32	12	00000000	000000
1.5	28	21 1/2°	42	45	12	24	15	Hardened	36	12	00000000	000000
1.5	30	21 1/2°	45	48	12	24	15	Hardened	38	12	00000000	000000
1.5	32	21 1/2°	48	51	12	24	15	Hardened	40	12	00000000	000000
1.5	35	21 1/2°	52	55.5	12	24	15	Hardened	42	12	00000000	000000
1.5	36	21 1/2°	54	57	12	24	15	Hardened	45	12	00000000	000000
1.5	40	21 1/2°	60	63	12	24	15	Hardened	50	12	00000000	000000
1.5	44	21 1/2°	66	69	12	24	15	Hardened	50	12	00000000	000000
1.5	45	21 1/2°	67	70.5	12	24	18	Hardened	50	12	00000000	000000
1.5	48	21 1/2°	72	75	12	24	18	Hardened	50	12	00000000	000000
1.5	50	21 1/2°	75	78	12	24	18	Hardened	60	12	00000000	000000
1.5	52	21 1/2°	78	81	12	24	18	Hardened	60	12	00000000	000000
1.5	60	21 1/2°	90	93	12	24	20	Hardened	60	12	00000000	000000
1.5	70	21 1/2°	105	108	12	24	20	Hardened	60	12	00000000	000000
1.5	80	21 1/2°	120	123	12	24	20	Hardened	70	12	00000000	000000
1.5	90	21 1/2°	135	138	12	24	20	Hardened	70	12	00000000	000000
1.5	100	21 1/2°	150	153	12	24	20	Hardened	70	12	00000000	000000

Metal Worms and Worm Gears

Worm and Gear Sold Separately

Worm gears use screw threads to make large reductions to shaft speed while transmitting motion at a right angle. They transmit motion from worm to gear and cannot be reversed. For gears and worms to mesh correctly, they must have the same pressure angle and pitch/module. These worms are compatible with plastic worm gears.

Speed ratio is the ratio by which output shaft speed is reduced. As speed decreases, torque increases.

Cast iron gears are strong and durable.

Bronze gears have low friction and dissipate heat better than cast iron gears to provide a long service life for both the gear and the worm. They’re also more corrosion resistant than cast iron gears.

Aluminum-bronze gears have excellent wear resistance.

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

Metric Worm Gears

Gear

										Hub
Module	Speed Ratio	Number of Teeth	Pressure Angle	Gear Pitch Dia., mm	For Number of Thread Starts	OD, mm	Face Wd., mm	Overall Wd., mm	For Shaft Dia., mm	Dia., mm	Wd., mm	Material	For Thread Direction	Teeth Heat Treatment	Teeth Fabrication		Each
Round Bore—Cast Iron
1.5	50:1	50	20°	75	1	79.5	14	24	12	40	10	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	000000
1.5	60:1	60	20°	90	1	94.5	14	24	12	40	10	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	00000
1.5	80:1	80	20°	120	1	124.4	14	24	15	50	10	Cast Iron	Right Hand	Not Hardened	Not Ground	000000000	00000
Round Bore—Bronze
1.5	50:1	50	20°	75	1	79.5	14	24	12	40	10	Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
Round Bore—Aluminum-Bronze
1.5	15:1	30	20°	45	2	49.5	14	24	10	30	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
1.5	20:1	20	20°	30	1	34.5	14	24	8	22	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
1.5	30:1	30	20°	45	1	49.5	14	24	10	30	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000
1.5	40:1	40	20°	60	1	64.5	14	24	12	35	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
1.5	50:1	50	20°	75	1	79.5	14	24	12	45	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
1.5	60:1	60	20°	90	1	94.5	14	24	12	50	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	000000
1.5	10:1	20	20°	30	2	34.5	14	24	8	22	10	Aluminum-Bronze	Right Hand	Not Hardened	Not Ground	000000000	00000

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
12	1.5	20°	4:1	60	90	90	24	12	32	50	12	Black-Oxide 1045 Carbon Steel	00000000	000000
12	1.5	20°	5:1	60	90	90	24	12	30	50	12	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
12	1.5	20°	4:1	15	23	27	23	8	56	18	10	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
12	1.5	20°	5:1	12	18	22	97	12.2	80	50	15	5	Black-Oxide 1045 Carbon Steel	00000000	000000

Plastic Miter Gears

Gears Sold Separately

Connect two shafts at a right angle without changing shaft speed or torque. Made of plastic, these gears run quieter than metal gears and have good corrosion and chemical resistance.

For two gears to mesh correctly, they must have the same pressure angle, pitch/module, and number of teeth.

Nylon gears are self-lubricating, so they’re often used in food machinery. However, they’re not approved for direct contact with food or chemicals that will come into contact with food.

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

Metric Gears

												Hub
Module	Number of Teeth	Pressure Angle	Gear Pitch Dia.	OD, mm	Face Wd., mm	Overall Wd., mm	For Shaft Dia., mm	Mounting Distance, mm	Material	Fabrication	Color	Dia., mm	Wd., mm		Each
Round Bore
2	25	20°	50mm	52.8	12	24	10	40	Nylon Plastic	Molded	Blue	40	10	00000000	000000

Metal Ratcheting Gears

Pawl and Gear Sold Separately

Compared to plastic gears, these metal ratcheting gears are better for high-load, high-speed, and heavy duty applications. Used to prevent unwanted motion in jacks, tie downs, clutches, and winches, ratchet gears have sloped teeth that allow motion in one direction and prevent it in the other.

Gears with hardened teeth are more wear resistant than gears with teeth that are not hardened.

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

Gears

								Hub
Face Wd.	Number of Teeth	OD	For Shaft Dia.	Mounting Distance	Material	Teeth Heat Treatment	Overall Wd.	Dia.	Wd.		Each
Round Bore
12mm	50	50mm	12mm	45.5mm	1045 Carbon Steel	Hardened	24 mm	35 mm	12 mm	0000000	000000
12mm	60	60mm	15mm	48.2mm	1045 Carbon Steel	Hardened	24 mm	40 mm	12 mm	0000000	00000
12mm	80	80mm	15mm	54.7mm	1045 Carbon Steel	Hardened	24 mm	50 mm	12 mm	0000000	00000
12mm	90	90mm	15mm	58.4mm	1045 Carbon Steel	Hardened	24 mm	50 mm	12 mm	0000000	00000
12mm	100	100mm	15mm	62.2mm	1045 Carbon Steel	Hardened	24 mm	50 mm	12 mm	0000000	00000

69 Products

About Gears

Self-Centering Screw-Clamp Bushings

High-Power Metal Gears

Metal Worms and Worm Gears

Metal Bevel Gears

Plastic Miter Gears

Metal Ratcheting Gears