System of Measurement System of Measurement |
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OD OD | Show |
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OD OD | Hide |
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For Belt Trade Size For Belt Trade Size |
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Teeth Shape Teeth Shape |
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![]() | Trapezoidal |
Outside Width Outside Width |
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Press-Fit Type Press-Fit Type |
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![]() | With Hub |
Inside Width Inside Width |
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Bore Type Bore Type |
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![]() | Plain |
Number of Flanges Number of Flanges |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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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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Mount Type Mount Type |
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![]() | Press Fit |
Finish Finish |
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H Series Timing Belt Pulleys
Pulleys are H series (heavy) 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.



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 3" Max. Belt Wd. | ||||||||||||||
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2.8" | 16 | 0.500" | 3/4" | Plain | 3.25" | 3.375" | 4.125" | 2.546" | 2 | Sintered | Steel | 2" | 00000000 | 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.



For Max. Belt Wd. | OD | Number of Teeth | For Shaft Dia. | Pitch | Dia. | Bore Type | Overall Wd. | Pitch Dia. | Fabrication | Material | Bearing Type | Hub Dia. | Each | |
For H Belt Trade Size | ||||||||||||||
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3" | 2.8" | 18 | 1" | 0.5" | 2 1/2" | Plain | 3 1/8" | 2.865" | Machined | Black-Oxide Iron | Needle Roller | 1 3/4" | 0000000 | 000000 |