Keep constant tension on your drive with these sprockets that press against your metric ISO roller chain to take up slack and reduce wear and vibration. They rotate freely on built-in ball bearings, which are double sealed to keep dirt out, and are for use with roller chain tensioners. All come with a finished bore that fits directly onto your shaft—no need for machining. These sprockets meet ISO 606, which is an international standard for dimensions and materials.

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

						Bearing
Number of Teeth	For Shaft Dia., mm	OD, mm	Overall Wd., mm	Hub Dia., mm	Material	Type	Material	Specifications Met		Each
For ISO 12B Roller Chain (19.05 mm Pitch)
15	16	100	18	40	Steel	Ball	Steel	ISO 606	0000000	000000

Quick-Grip Screw-Clamp Bushings

Also known as Trantorque bushings, these tighten with a twist of the collar nut—no screws needed. As you tighten the collar nut, the inner sleeve contracts onto the shaft and the outer sleeve expands to hold your sprocket, pulley, or gear.

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

Zinc-Plated Steel
For Shaft Dia.	OD	Overall Wd.	Max. Torque, in.-lbs.		Each
75mm	100mm	108mm	17,700	0000000	0000000

Timing Belt Idler Pulleys

Add these free-spinning pulleys to your timing belt setup to minimize vibration and keep belts from wearing out. The needle bearing at the center of these pulleys is lined with small, cylindrical rollers that reduce friction as they rotate. This bearing allows both the pulley and the shaft it’s mounted on to spin independently. Made from iron or steel, these pulleys are strong and wear-resistant. The black oxide coating protects the pulleys from corrosion in dry environments.

Trapezoidal teeth on the outside of the pulley fit into teeth inside your timing belt—select a pulley that matches your belt trade size. The maximum belt width should be the same size or larger than the width of your timing belt.

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

Metric—Press-Fit Mount

With Two Flanges

With Two Flanges and a Hub

With Two Flanges and Without a Hub

For GT Belt Trade Size
For Max. Belt Wd., mm	OD, mm	Number of Teeth	Pitch, mm	For Shaft Dia., mm	Dia., mm	Bore Type	Inside Wd., mm	Outside Wd., mm	Overall Wd., mm	Pitch Dia., mm	Number of Flanges	Fabrication	Material	Bearing Type	Hub Dia., mm		Each
30	100	36	8	30	90.3	Plain	30	48	48	91.67	2	Machined	Black-Oxide Iron	Needle Roller	__	0000000	0000000
For GT2 Belt Trade Size
36	100	36	8	30	90.07	Plain	36	46	46	91.67	2	Machined	Black-Oxide Iron	Needle Roller	__	0000000	000000
62	100	36	8	30	90.07	Plain	62	91	91	91.67	2	Machined	Black-Oxide Iron	Needle Roller	79.5	0000000	000000

High-Strength Corrosion-Resistant HTD Timing Belt Pulleys

Move belts forward and backward or stop and start them in precise positions, especially in areas where rust is a concern. The curved teeth on these high-torque drive (HTD) pulleys have more surface contact with belts than traditional trapezoidal teeth, which allows you to apply more torque without damaging belts. These teeth fit together seamlessly to prevent backlash, or unwanted movement of the belt on the pulley, for a smooth, quiet cycle. These pulleys are often used in 3D printing, machine tool drives, robotics, and other applications where precision is essential. They are also known as curvilinear belt pulleys.

Pair pulleys with an HTD timing belt that has the same pitch. The width of your belt should not be larger than the maximum belt width listed.

Stainless steel pulleys can be wetted repeatedly without rusting or staining.

Bushing-mount pulleys grip the shaft more securely than press-fit pulleys, but require a quick-disconnect (QD) bushing (not included).

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

Stainless Steel—Bushing Mount

Bushing Mount

For 50 mm Max. Belt Wd.
OD, mm	Number of Teeth	Pitch, mm	ID	Bore Type	For Bushing Style	Inside Wd., mm	Outside Wd., mm	Overall Wd., mm	Pitch Dia., mm	Number of Flanges	Fabrication		Each
100	36	8	1.871"	Finished	Quick Disconnect Style SH	53.98	60.33	60.33	90.297	2	Machined	0000000	0000000

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
2	48	21 1/2°	96	100	16	29	20	Hardened	60	13	00000000	0000000
Right Hand
Round Bore—4140 Alloy Steel
2	48	21 1/2°	96	100	16	29	20	Hardened	60	13	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	100	100mm	15mm	62.2mm	1045 Carbon Steel	Hardened	12 mm	__	__	0000000	000000
12mm	100	100mm	15mm	62.2mm	1045 Carbon Steel	Hardened	24 mm	50 mm	12 mm	0000000	00000
15mm	50	100mm	15mm	72.3mm	1045 Carbon Steel	Hardened	15 mm	__	__	0000000	00000
15mm	50	100mm	15mm	72.3mm	1045 Carbon Steel	Hardened	29 mm	60 mm	14 mm	00000000	00000

12 Products

About Roller Chain and Sprockets

About Gears

Idler Sprockets for Metric Roller Chain

Quick-Grip Screw-Clamp Bushings

Timing Belt Idler Pulleys

High-Strength Corrosion-Resistant HTD Timing Belt Pulleys

High-Power Metal Gears

Metal Ratcheting Gears