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For Maximum Belt Width For Maximum Belt Width |
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For Bushing Style For Bushing Style |
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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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L Series Quick-Disconnect Timing Belt Pulleys
Carry heavy loads without slippage—pulleys mount with quick-disconnect (QD) bushings (sold separately) for a more secure grip on the shaft than set screws. Bushing is not included. Pulleys are L series (light) and have trapezoidal teeth. Select a pulley with a maximum belt width that’s the same or larger than your timing belt width.



OD | Number of Teeth | Pitch | ID | Bore Type | For Bushing Style | Outside Wd. | Overall Wd. | Pitch Dia. | Fabrication | Material | Each | |
For 1/2" Max. Belt Wd. | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
7.13" | 60 | 0.375" | 2.187" | Finished | Quick Disconnect Style SD | 0.75" | 1.25" | 7.162" | Cast | Iron | 00000000 | 0000000 |
For 3/4" Max. Belt Wd. | ||||||||||||
7.13" | 60 | 0.375" | 2.187" | Finished | Quick Disconnect Style SD | 1" | 1.25" | 7.162" | Cast | Iron | 00000000 | 000000 |
For 1" Max. Belt Wd. | ||||||||||||
7.13" | 60 | 0.375" | 2.187" | Finished | Quick Disconnect Style SD | 1.25" | 1.25" | 7.162" | Cast | Iron | 00000000 | 000000 |
H Series Quick-Disconnect Timing Belt Pulleys
Move heavy loads without slippage—pulleys mount with quick-disconnect (QD) bushings (sold separately) for a more secure grip on the shaft than set screws. Bushing is not included. 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 | ID | Bore Type | For Bushing Style | Inside Wd. | Outside Wd. | Overall Wd. | Pitch Dia. | Number of Flanges | Fabrication | Material | Each | |
For 1" Max. Belt Wd. | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
5.02" | 30 | 0.500" | 2.187" | Finished | Quick Disconnect Style SD | 1.063" | 1.313" | 1.313" | 4.775" | 2 | Cast | Iron | 00000000 | 0000000 |
5.33" | 32 | 0.500" | 2.812" | Finished | Quick Disconnect Style SK | 1.063" | 1.313" | 1.313" | 5.093" | 2 | Cast | Iron | 0000000 | 000000 |
5.97" | 36 | 0.500" | 2.812" | Finished | Quick Disconnect Style SK | 1.063" | 1.313" | 1.313" | 5.73" | 2 | Cast | Iron | 00000000 | 000000 |
6.61" | 40 | 0.500" | 2.812" | Finished | Quick Disconnect Style SK | 1.063" | 1.313" | 1.313" | 6.366" | 2 | Cast | Iron | 00000000 | 000000 |
7.88" | 48 | 0.500" | 2.812" | Finished | Quick Disconnect Style SK | 1.063" | 1.313" | 1.313" | 7.639" | 2 | Cast | Iron | 00000000 | 000000 |
9.52" | 60 | 0.500" | 3.125" | Finished | Quick Disconnect Style SF | __ | 1.313" | 1.313" | 9.549" | __ | Cast | Iron | 00000000 | 000000 |
19.09" | 120 | 0.500" | 3.125" | Finished | Quick Disconnect Style SF | __ | 1.313" | 1.313" | 19.099" | __ | Cast | Iron | 00000000 | 000000 |
For 1 1/2" Max. Belt Wd. | ||||||||||||||
5.02" | 30 | 0.500" | 2.187" | Finished | Quick Disconnect Style SD | 1.563" | 1.813" | 1.813" | 4.775" | 2 | Cast | Iron | 00000000 | 000000 |
5.33" | 32 | 0.500" | 2.812" | Finished | Quick Disconnect Style SK | 1.563" | 1.813" | 1.813" | 5.093" | 2 | Cast | Iron | 0000000 | 000000 |
5.97" | 36 | 0.500" | 2.812" | Finished | Quick Disconnect Style SK | 1.563" | 1.813" | 1.813" | 5.73" | 2 | Cast | Iron | 00000000 | 000000 |
6.61" | 40 | 0.500" | 2.812" | Finished | Quick Disconnect Style SK | 1.563" | 1.813" | 1.813" | 6.366" | 2 | Cast | Iron | 00000000 | 000000 |
7.88" | 48 | 0.500" | 2.812" | Finished | Quick Disconnect Style SK | 1.563" | 1.813" | 1.813" | 7.639" | 2 | Cast | Iron | 00000000 | 000000 |
9.52" | 60 | 0.500" | 3.125" | Finished | Quick Disconnect Style SF | __ | 1.813" | 1.813" | 9.549" | __ | Cast | Iron | 00000000 | 000000 |
19.09" | 120 | 0.500" | 3.125" | Finished | Quick Disconnect Style SF | __ | 1.813" | 1.813" | 19.099" | __ | Cast | Iron | 00000000 | 000000 |
For 2" Max. Belt Wd. | ||||||||||||||
3.42" | 20 | 0.500" | 1.87" | Finished | Quick Disconnect Style SH | 2.094" | 2.344" | 2.344" | 3.183" | 2 | Machined | Black-Oxide Iron | 00000000 | 000000 |
3.735" | 22 | 0.500" | 2.187" | Finished | Quick Disconnect Style SD | 2.094" | 2.344" | 2.344" | 3.501" | 2 | Machined | Black-Oxide Iron | 00000000 | 000000 |
4.05" | 24 | 0.500" | 2.187" | Finished | Quick Disconnect Style SD | 2.094" | 2.344" | 2.344" | 3.82" | 2 | Machined | Black-Oxide Iron | 00000000 | 000000 |
4.369" | 26 | 0.500" | 2.187" | Finished | Quick Disconnect Style SD | 2.094" | 2.344" | 2.344" | 4.138" | 2 | Machined | Black-Oxide Iron | 00000000 | 000000 |
4.687" | 28 | 0.500" | 2.187" | Finished | Quick Disconnect Style SD | 2.094" | 2.344" | 2.344" | 4.456" | 2 | Machined | Black-Oxide Iron | 00000000 | 000000 |
5" | 30 | 0.500" | 2.187" | Finished | Quick Disconnect Style SD | 2.094" | 2.344" | 2.344" | 4.775" | 2 | Machined | Black-Oxide Iron | 00000000 | 000000 |
5.32" | 32 | 0.500" | 2.812" | Finished | Quick Disconnect Style SK | 2.094" | 2.344" | 2.344" | 5.093" | 2 | Machined | Black-Oxide Iron | 0000000 | 000000 |
5.959" | 36 | 0.500" | 2.812" | Finished | Quick Disconnect Style SK | 2.094" | 2.344" | 2.344" | 5.73" | 2 | Machined | Black-Oxide Iron | 00000000 | 000000 |
6.6" | 40 | 0.500" | 2.812" | Finished | Quick Disconnect Style SK | 2.094" | 2.344" | 2.344" | 6.366" | 2 | Machined | Black-Oxide Iron | 00000000 | 000000 |
8.016" | 48 | 0.500" | 3.125" | Finished | Quick Disconnect Style SF | 2.094" | 2.344" | 2.344" | 7.639" | 2 | Machined | Black-Oxide Iron | 00000000 | 000000 |
9.495" | 60 | 0.500" | 3.125" | Finished | Quick Disconnect Style SF | __ | 2.344" | 2.344" | 9.549" | __ | Cast | Black-Oxide Iron | 00000000 | 000000 |
19.045" | 120 | 0.500" | 3.834" | Finished | Quick Disconnect Style E | __ | 2.344" | 2.344" | 19.099" | __ | Cast | Black-Oxide Iron | 00000000 | 000000 |
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 | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 |




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 | |
For GT Belt Trade Size | |||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
20 | 90 | 32 | 8 | 20 | 80.12 | Plain | 20 | 31.5 | 46.23 | 81.48 | 2 | Machined | Black-Oxide Iron | Needle Roller | 69.85 | 0000000 | 0000000 |
30 | 100 | 36 | 8 | 30 | 90.3 | Plain | 30 | 48 | 48 | 91.67 | 2 | Machined | Black-Oxide Iron | Needle Roller | __ | 0000000 | 000000 |
For GT2 Belt Trade Size | |||||||||||||||||
21 | 90 | 32 | 8 | 20 | 79.88 | Plain | 21 | 31.5 | 45.97 | 81.48 | 2 | Machined | Black-Oxide Iron | Needle Roller | 69.85 | 0000000 | 000000 |
37 | 146 | 30 | 14 | 40 | 130.89 | Plain | 37 | 52.32 | 58.67 | 133.68 | 2 | Machined | Black-Oxide Iron | Needle Roller | 111 | 0000000 | 000000 |
62 | 100 | 36 | 8 | 30 | 90.07 | Plain | 62 | 73.91 | 91.19 | 91.67 | 2 | Machined | Black-Oxide Iron | Needle Roller | 79.5 | 0000000 | 000000 |
High-Strength HTD Timing Belt Pulleys
These HTD (high torque drive) pulleys have a curved tooth shape that provides higher strength than trapezoidal teeth. Select a pulley with a maximum belt width that’s the same or larger than your timing belt width.
Press-fit mount pulleys come machined to the for shaft diameter size and are machinable up to the for maximum shaft diameter size.
Bushing-mount pulleys grip the shaft more securely than pulleys that press fit. Quick-disconnect (QD) bushings and split-tapered bushings sold separately.



OD, mm | Number of Teeth | Pitch, mm | For Shaft Dia. | For Max. Shaft Dia. | Bore Type | Inside Wd., mm | Outside Wd., mm | Overall Wd., mm | Pitch Dia., mm | Number of Flanges | Fabrication | Material | Hub Dia., mm | Each | |
For 15 mm Max. Belt Wd. | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
54.11 | 32 | 5 | 1/2" | 7/8" | Plain | 16.51 | 21.34 | 34.04 | 50.927 | 2 | Machined | Black-Oxide Iron | 39.37 | 0000000 | 000000 |
60.46 | 34 | 5 | 1/2" | 1" | Plain | 16.51 | 21.34 | 34.04 | 54.102 | 2 | Machined | Black-Oxide Iron | 42.67 | 0000000 | 00000 |
60.46 | 36 | 5 | 1/2" | 1 1/8" | Plain | 16.51 | 21.34 | 34.04 | 57.302 | 2 | Machined | Black-Oxide Iron | 45.72 | 0000000 | 00000 |
For 20 mm Max. Belt Wd. | |||||||||||||||
65.03 | 22 | 8 | 1/2" | 1.188" | Plain | 22.23 | 28.58 | 44.45 | 56.032 | 2 | Machined | Black-Oxide Iron | 41.28 | 00000000 | 00000 |
For 30 mm Max. Belt Wd. | |||||||||||||||
65.03 | 22 | 8 | 1/2" | 1.188" | Plain | 31.75 | 38.1 | 53.98 | 56.032 | 2 | Machined | Black-Oxide Iron | 41.28 | 00000000 | 00000 |
70.11 | 24 | 8 | 1/2" | 1 1/4" | Plain | 31.75 | 38.1 | 53.98 | 61.112 | 2 | Machined | Black-Oxide Iron | 46.02 | 00000000 | 00000 |
74.93 | 26 | 8 | 1/2" | 1 1/4" | Plain | 31.75 | 38.1 | 57.15 | 66.217 | 2 | Machined | Black-Oxide Iron | 50.8 | 00000000 | 00000 |



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 | Material | Each | |
For 15 mm Max. Belt Wd. | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
69.85 | 40 | 5 | 1.375" | Finished | Quick Disconnect Style JA | 16.51 | 21.34 | 21.34 | 63.652 | 2 | Machined | Black-Oxide Iron | 0000000 | 000000 |
96.52 | 56 | 5 | 1.871" | Finished | Quick Disconnect Style SH | 16.51 | 21.34 | 21.34 | 89.128 | 2 | Machined | Black-Oxide Iron | 0000000 | 00000 |
For 20 mm Max. Belt Wd. | ||||||||||||||
74.93 | 26 | 8 | 1.375" | Finished | Quick Disconnect Style JA | 22.23 | 28.58 | 28.58 | 66.217 | 2 | Machined | Black-Oxide Iron | 00000000 | 00000 |
80.01 | 28 | 8 | 1.625" | Finished | Split Tapered Style H | 22.23 | 28.58 | 28.58 | 71.297 | 2 | Machined | Black-Oxide Iron | 00000000 | 00000 |
85.09 | 30 | 8 | 1.625" | Finished | Split Tapered Style H | 22.23 | 28.58 | 28.58 | 76.403 | 2 | Machined | Black-Oxide Iron | 00000000 | 00000 |
97.03 | 34 | 8 | 1.871" | Finished | Quick Disconnect Style SH | 22.35 | 28.7 | 28.7 | 86.588 | 2 | Machined | Black-Oxide Iron | 00000000 | 00000 |
109.99 | 40 | 8 | 1.871" | Finished | Quick Disconnect Style SH | 22.35 | 28.7 | 28.7 | 101.854 | 2 | Machined | Black-Oxide Iron | 0000000 | 00000 |
120.91 | 44 | 8 | 2.187" | Finished | Quick Disconnect Style SDS | 22.35 | 28.7 | 28.7 | 112.039 | 2 | Machined | Black-Oxide Iron | 00000000 | 00000 |
131.07 | 48 | 8 | 2.187" | Finished | Quick Disconnect Style SDS | 22.35 | 28.7 | 28.7 | 122.224 | 2 | Machined | Black-Oxide Iron | 00000000 | 00000 |
151.13 | 56 | 8 | 2.187" | Finished | Quick Disconnect Style SDS | 22.35 | 28.7 | 28.7 | 142.595 | 2 | Machined | Black-Oxide Iron | 00000000 | 00000 |
For 30 mm Max. Belt Wd. | ||||||||||||||
80.01 | 28 | 8 | 1.625" | Finished | Split Tapered Style H | 31.75 | 38.1 | 38.1 | 71.297 | 2 | Machined | Black-Oxide Iron | 00000000 | 00000 |
85.09 | 30 | 8 | 1.625" | Finished | Split Tapered Style H | 31.75 | 38.1 | 38.1 | 76.403 | 2 | Machined | Black-Oxide Iron | 00000000 | 00000 |
89.92 | 32 | 8 | 1.625" | Finished | Split Tapered Style H | 31.88 | 38.23 | 38.23 | 81.483 | 2 | Machined | Black-Oxide Iron | 00000000 | 00000 |
97.03 | 34 | 8 | 1.871" | Finished | Quick Disconnect Style SH | 31.88 | 38.23 | 38.23 | 86.588 | 2 | Machined | Black-Oxide Iron | 00000000 | 00000 |
109.99 | 40 | 8 | 1.871" | Finished | Quick Disconnect Style SH | 31.88 | 38.23 | 38.23 | 101.854 | 2 | Machined | Black-Oxide Iron | 0000000 | 00000 |
120.91 | 44 | 8 | 2.187" | Finished | Quick Disconnect Style SDS | 31.88 | 38.23 | 38.23 | 112.039 | 2 | Machined | Black-Oxide Iron | 00000000 | 00000 |
131.07 | 48 | 8 | 2.187" | Finished | Quick Disconnect Style SDS | 31.88 | 38.23 | 38.23 | 122.224 | 2 | Machined | Black-Oxide Iron | 00000000 | 00000 |
151.13 | 56 | 8 | 2.187" | Finished | Quick Disconnect Style SDS | 31.88 | 38.23 | 38.23 | 142.595 | 2 | Machined | Black-Oxide Iron | 00000000 | 00000 |
For 50 mm Max. Belt Wd. | ||||||||||||||
97.03 | 34 | 8 | 1.871" | Finished | Quick Disconnect Style SH | 54.1 | 60.45 | 60.45 | 86.588 | 2 | Machined | Black-Oxide Iron | 0000000 | 000000 |
100.08 | 36 | 8 | 1.871" | Finished | Quick Disconnect Style SH | 54.1 | 60.45 | 60.45 | 91.668 | 2 | Machined | Black-Oxide Iron | 0000000 | 000000 |
109.99 | 40 | 8 | 1.871" | Finished | Quick Disconnect Style SH | 54.1 | 60.45 | 60.45 | 101.854 | 2 | Machined | Black-Oxide Iron | 0000000 | 000000 |
High-Strength HTD Timing Belt Idler Pulleys
Keep high torque drive (HTD) timing belt systems running tightly with these idler pulleys. Made with built-in, free-spinning ball bearings, they're installed on shafts or belt tensioners (not included) to remove slack from timing belts. By maintaining tension on the belt, these pulleys reduce wear and vibration in 3D printing, machine tool drives, robotics, and other linear motion applications that require precise positioning.
When replacing an idler pulley, be sure the pulley matches your belt's trade size.
Toothed pulleys are shaped to mesh with the teeth on a timing belt, which reduces wear on the belt's teeth.
Iron pulleys are strong and wear resistant, with a black oxide coating that protects them from corrosion in dry environments.
For technical drawings and 3-D models, click on a part number.

OD | Number of Teeth | For Shaft Dia. | Dia. | Wd. | Shaft Mount Type | Bore Type | Fabrication | Material | Bearing Type | Each | |
For 30 mm Max. Belt Wd. | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
1.85" | 19 | 1" | 1.85" | 1 5/16" | Press Fit | Plain | Machined | Black-Oxide Iron | Needle Roller | 0000000 | 000000 |
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.
For technical drawings and 3-D models, click on a part number.



Number of Teeth | Pitch, mm | ID | Bore Type | For Bushing Style | Inside Width, mm | Outside Width, mm | Overall Width, mm | Pitch Diameter, mm | Number of Flanges | Fabrication | Material | Each | |
For 40 mm Maximum Belt Width | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
28 | 14 | 2.75" | Plain | Taper-Lock Style 2012 | 46.23 | 54.1 | 54.1 | 124.765 | 2 | Machined | Black-Oxide Iron | 00000000 | 0000000 |
46 | 14 | 3.375" | Plain | Taper-Lock Style 2517 | 46.23 | 54.1 | 54.1 | 204.978 | 2 | Machined | Black-Oxide Iron | 00000000 | 000000 |
72 | 14 | 4.25" | Plain | Taper-Lock Style 3020 | 46.23 | 54.1 | 54.1 | 320.853 | 2 | Cast, Machined | Black-Oxide Iron | 00000000 | 000000 |
High-Strength Ultra-Quiet Timing Belt Pulleys
Teeth are curved and set in an offset pattern for high strength with 25% less operating noise than pulleys and belts with trapezoidal teeth. Select a pulley with a maximum belt width that’s the same or larger than your timing belt width.
Press-fit mount pulleys come machined to the for shaft diameter size and are machinable up to the for maximum shaft diameter size.
Bushing-mount pulleys grip the shaft more securely than pulleys that press fit. Quick-disconnect (QD) bushings and split-tapered bushings sold separately.
For technical drawings and 3-D models, click on a part number.



OD, mm | Number of Teeth | Pitch, mm | For Shaft Dia. | For Max. Shaft Dia. | Bore Type | Outside Wd., mm | Overall Wd., mm | Pitch Dia., mm | Fabrication | Material | Hub Dia., mm | Each | |
For 16 mm Max. Belt Wd. | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
44.45 | 18 | 8 | 1/2" | 7/8" | Plain | 17 | 29 | 46 | Cast | Magnesium-Phosphate-Coated Iron | 38.7 | 0000000 | 0000000 |
For 32 mm Max. Belt Wd. | |||||||||||||
62.23 | 25 | 8 | 1/2" | 1 3/8" | Plain | 33 | 49 | 64 | Cast | Magnesium-Phosphate-Coated Iron | 53.5 | 0000000 | 000000 |



OD, mm | Number of Teeth | Pitch, mm | ID | Bore Type | For Bushing Style | Outside Wd., mm | Overall Wd., mm | Pitch Dia., mm | Fabrication | Material | Each | |
For 16 mm Max. Belt Wd. | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
69.85 | 28 | 8 | 1.625" | Finished | Split Tapered Style H | 17 | 17 | 71 | Cast | Magnesium-Phosphate-Coated Iron | 0000000 | 0000000 |
90.43 | 36 | 8 | 1.871" | Finished | Quick Disconnect Style SH | 17 | 17 | 92 | Cast | Magnesium-Phosphate-Coated Iron | 0000000 | 000000 |
For 32 mm Max. Belt Wd. | ||||||||||||
100.59 | 40 | 8 | 1.871" | Finished | Quick Disconnect Style SH | 33 | 33 | 102 | Cast | Magnesium-Phosphate-Coated Iron | 0000000 | 000000 |
120.91 | 48 | 8 | 2.187" | Finished | Quick Disconnect Style SDS | 33 | 33 | 122 | Cast | Magnesium-Phosphate-Coated Iron | 0000000 | 000000 |