System of Measurement System of Measurement |
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OD OD |
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For Shaft Diameter For Shaft Diameter | Show |
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For Shaft Diameter For Shaft Diameter | Hide |
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Material Material |
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Component Component |
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 | Gear |
Hub Diameter Hub Diameter |
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For Roller Chain Strand Type For Roller Chain Strand Type |
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 | Single |
ID ID |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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For Shaft Angle For Shaft Angle |
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 | 90° |
About Roller Chain and Sprockets
More
About Gears
More
Sprockets for Miniature Roller Chain
Often used in electronic equipment, instrumentation devices, printers, and other compact machinery, these sprockets are made for use with our miniature roller chain.
Acetal sprockets are lightweight, quiet, and nonconductive. Press fit them onto your shaft. Stainless steel sprockets are corrosion resistant for use in harsh environments. Mount them onto your shaft and secure with a set screw.
For technical drawings and 3-D models, click on a part number.
| Number of Teeth | For Shaft Dia. | OD | Overall Wd. | Hub Dia. | Material | Includes | Each | |
0.1227" Pitch | ||||||||
|---|---|---|---|---|---|---|---|---|
| 8 | 1/8" | 0.371" | 5/16" | 15/64" | Acetal Plastic | __ | 00000000 | 00000 |
| 9 | 1/8" | 0.409" | 5/16" | 1/4" | Acetal Plastic | __ | 00000000 | 0000 |
| 10 | 1/8" | 0.456" | 5/16" | 1/4" | Acetal Plastic | __ | 000000000 | 0000 |
0.1475" Pitch | ||||||||
| 8 | 1/8" | 0.437" | 11/32" | 9/32" | 303 Stainless Steel | One Set Screw | 0000000 | 00000 |
| 9 | 1/8" | 0.483" | 11/32" | 21/64" | 303 Stainless Steel | One Set Screw | 0000000 | 00000 |
| 10 | 1/8" | 0.529" | 11/32" | 3/8" | 303 Stainless Steel | One Set Screw | 0000000 | 00000 |
| 12 | 1/8" | 0.622" | 11/32" | 25/64" | 303 Stainless Steel | One Set Screw | 0000000 | 00000 |
MXL Series Lightweight Timing Belt Pulleys
Made from polycarbonate, these pulleys are useful in applications with weight constraints. All are MXL series (miniature extra light) and have trapezoidal teeth. The teeth match up with the grooves along the inside diameter of a timing belt in order to move components forward or backward. 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.
1 Flange | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OD | Number of Teeth | Pitch | For Shaft Dia. | Bore Type | Inside Wd. | Outside Wd. | Overall Wd. | Pitch Dia. | Fabrication | Material | Hub Dia. | Each | |
For 1/4" Max. Belt Wd. | |||||||||||||
| 0.53" | 14 | 0.080" | 1/8" | Finished | 0.25" | 0.438" | 0.688" | 0.357" | Molded | Polycarbonate | 0.438" | 0000000 | 00000 |
| 0.55" | 15 | 0.080" | 1/8" | Finished | 0.25" | 0.438" | 0.688" | 0.382" | Molded | Polycarbonate | 0.438" | 0000000 | 0000 |
| 0.58" | 16 | 0.080" | 1/8" | Finished | 0.25" | 0.438" | 0.688" | 0.407" | Molded | Polycarbonate | 0.438" | 0000000 | 0000 |
MXL Series Corrosion-Resistant Timing Belt Pulleys
Anodized aluminum has good corrosion resistance. Pulleys are MXL series (miniature extra light) and have trapezoidal teeth. The teeth match up with the grooves along the inside diameter of a timing belt in order to move components forward or backward. 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.
| OD | Number of Teeth | Pitch | For Shaft Dia. | Bore Type | Inside Wd. | Outside Wd. | Overall Wd. | Pitch Dia. | Number of Flanges | Fabrication | Material | Hub Dia. | Each | |
For 1/8" Max. Belt Wd. | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.425" | 10 | 0.080" | 1/8" | Finished | 0.16" | 0.201" | 0.438" | 0.255" | 1 | Machined | Anodized Aluminum | 0.425" | 0000000 | 000000 |
| 0.45" | 11 | 0.080" | 1/8" | Finished | 0.16" | 0.201" | 0.438" | 0.28" | 1 | Machined | Anodized Aluminum | 0.45" | 0000000 | 00000 |
| 0.48" | 12 | 0.080" | 1/8" | Finished | 0.16" | 0.201" | 0.438" | 0.306" | 1 | Machined | Anodized Aluminum | 0.48" | 0000000 | 00000 |
| 0.53" | 14 | 0.080" | 1/8" | Finished | 0.16" | 0.201" | 0.438" | 0.357" | 1 | Machined | Anodized Aluminum | 0.53" | 0000000 | 00000 |
For 1/4" Max. Belt Wd. | ||||||||||||||
| 0.425" | 10 | 0.080" | 1/8" | Finished | 0.29" | 0.33" | 0.563" | 0.255" | 1 | Machined | Anodized Aluminum | 0.425" | 0000000 | 00000 |
| 0.45" | 11 | 0.080" | 1/8" | Finished | 0.29" | 0.33" | 0.563" | 0.28" | 1 | Machined | Anodized Aluminum | 0.45" | 0000000 | 00000 |
| 0.48" | 12 | 0.080" | 1/8" | Finished | 0.29" | 0.33" | 0.563" | 0.306" | 1 | Machined | Anodized Aluminum | 0.48" | 0000000 | 00000 |
| 0.53" | 14 | 0.080" | 1/8" | Finished | 0.29" | 0.33" | 0.563" | 0.357" | 1 | Machined | Anodized Aluminum | 0.53" | 0000000 | 00000 |
High-Strength GT Timing Belt Pulleys
For higher speed or higher torque applications, these GT series timing belt pulleys provide a more precise fit than HTD pulleys. Use them where accuracy is critical, such as in storage and retrieval systems or in robotics. Similar to HTD timing belt pulleys, their teeth are curved for high strength. The curved teeth create positive grip engagement with timing belts, so these pulleys do not require re-tensioning—unlike drives using V-belts or sheaves. And unlike chain drives, there’s no metal-on-metal contact, so these pulleys don’t require lubrication.
Anodized aluminum pulleys are lightweight and resist corrosion. They have a finished bore and come with set screws for mounting on shafts.
For technical drawings and 3-D models, click on a part number.
| Number of Teeth | Pitch, mm | For Shaft Diameter | Bore Type | Inside Width, mm | Outside Width, mm | Overall Width, mm | Pitch Diameter, mm | Number of Flanges | Fabrication | Material | Hub Diameter, mm | Each | |
For 6 mm Maximum Belt Width | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 12 | 2 | 1/8" | Finished | 7.37 | 8.38 | 14.27 | 7.645 | 1 | Machined | Anodized Aluminum | 12.19 | 00000000 | 000000 |
| 14 | 2 | 1/8" | Finished | 7.37 | 8.38 | 14.27 | 8.915 | 1 | Machined | Anodized Aluminum | 13.46 | 00000000 | 00000 |
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.
Brass gears and racks are easy to machine, so you can add your own mounting holes and make other alterations. They won't rust when exposed to water.
For technical drawings and 3-D models, click on a part number.
Hub | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Gear Pitch | Number of Teeth | Gear Pitch Dia. | OD | Face Wd. | Overall Wd. | For Shaft Dia. | Material | Dia. | Wd. | Each | |
Round Bore | |||||||||||
| 64 | 16 | 1/4" | 0.28" | 1/8" | 0.315" | 1/8" | Brass | 0.19" | 0.19" | 0000000 | 000000 |
| 64 | 24 | 3/8" | 0.41" | 1/8" | 0.315" | 1/8" | Brass | 0.28" | 0.19" | 0000000 | 00000 |
| 64 | 28 | 0.438" | 0.47" | 1/8" | 0.315" | 1/8" | Brass | 0.34" | 0.19" | 0000000 | 00000 |
| 48 | 12 | 1/4" | 0.29" | 1/8" | 0.315" | 1/8" | Brass | 0.18" | 0.19" | 0000000 | 00000 |
| 48 | 15 | 0.312" | 0.35" | 1/8" | 0.315" | 1/8" | Brass | 0.22" | 0.19" | 0000000 | 00000 |
| 48 | 18 | 3/8" | 0.42" | 1/8" | 0.315" | 1/8" | Brass | 0.28" | 0.19" | 0000000 | 00000 |
| 32 | 12 | 3/8" | 0.44" | 3/16" | 0.438" | 1/8" | Brass | 0.28" | 0.25" | 0000000 | 00000 |
| 32 | 14 | 0.438" | 0.5" | 3/16" | 0.438" | 1/8" | Brass | 0.34" | 0.25" | 0000000 | 00000 |
Metal Miter Gears
With straight, conically shaped teeth and a 1:1 speed ratio, miter gears connect two shafts at an angle without changing shaft speed or torque. They're more efficient than spiral miter gears because they create less friction.
For two gears to mesh correctly, they must have the same pressure angle, shaft angle, pitch/module, and number of teeth.
Carbon steel gears have hard, strong, and wear-resistant teeth. They’re best for heavy duty and high-torque applications, such as lifting equipment. However, these gears will rust when exposed to moisture or corrosive chemicals. Some gears have hardened teeth for additional wear resistance; gears with teeth that are not hardened can be hardened to fit your application.
For technical drawings and 3-D models, click on a part number.
Hub | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gear Pitch | Number of Teeth | For Shaft Angle | Pressure Angle | Gear Pitch Dia. | OD | Face Wd. | Overall Wd. | For Shaft Dia. | Mounting Distance | Teeth Heat Treatment | Dia. | Wd. | Each | |
Round Bore—1117 Carbon Steel | ||||||||||||||
| 48 | 18 | 90° | 20° | 3/8" | 0.4" | 0.08" | 0.286" | 1/8" | 0.406" | Not Hardened | 0.31" | 0.16" | 0000000 | 000000 |
Plastic Gears and Gear Racks—14 1/2° Pressure Angle
A former industry standard, 14½° pressure angle gears are often found on older machinery. 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.
For technical drawings and 3-D models, click on a part number.
Round/Machinable
Bore
Hub | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gear Pitch | Number of Teeth | Gear Pitch Dia. | OD | Face Wd. | Overall Wd. | For Shaft Dia. | Material | Fabrication | Color | Dia. | Wd. | Each | |
Round Bore | |||||||||||||
| 48 | 16 | 0.333" | 0.37" | 1/8" | 0.313" | 1/8" | Nylon Plastic | Molded | White | 0.25" | 0.188" | 00000000 | 00000 |
| 48 | 18 | 3/8" | 0.41" | 1/8" | 0.313" | 1/8" | Nylon Plastic | Molded | White | 0.313" | 0.188" | 00000000 | 0000 |
| 48 | 20 | 0.417" | 0.45" | 1/8" | 0.375" | 1/8" | Nylon Plastic | Molded | White | 0.375" | 0.25" | 00000000 | 00000 |
| 48 | 24 | 1/2" | 0.54" | 1/8" | 0.375" | 1/8" | Nylon Plastic | Molded | White | 0.375" | 0.25" | 00000000 | 0000 |
| 48 | 28 | 0.583" | 0.62" | 1/8" | 0.375" | 1/8" | Nylon Plastic | Molded | White | 0.5" | 0.25" | 00000000 | 00000 |
| 48 | 32 | 0.667" | 0.7" | 1/8" | 0.375" | 1/8" | Nylon Plastic | Molded | White | 0.5" | 0.25" | 00000000 | 0000 |
| 32 | 12 | 3/8" | 0.44" | 3/16" | 0.375" | 1/8" | Nylon Plastic | Molded | White | 0.25" | 0.188" | 00000000 | 0000 |
| 32 | 14 | 0.438" | 0.5" | 3/16" | 0.438" | 1/8" | Nylon Plastic | Molded | White | 0.313" | 0.25" | 00000000 | 0000 |
Plastic Miter Gears
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.
Hub | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gear Pitch | Number of Teeth | Pressure Angle | Gear Pitch Dia. | OD | Face Wd. | Overall Wd. | For Shaft Dia. | Mounting Distance | Material | Fabrication | Color | Dia. | Wd. | Each | |
Round Bore | |||||||||||||||
| 48 | 18 | 20° | 3/8" | 0.4" | 0.05" | 0.264" | 1/8" | 0.406" | Nylon Plastic | Molded | White | 0.328" | 0.188" | 0000000 | 00000 |