System of Measurement System of Measurement |
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Belt Trade Size Belt Trade Size |
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Teeth Location Teeth Location |
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![]() | Teeth on One Side |
Material Material |
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Number of Teeth Number of Teeth |
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Reinforcement Material Reinforcement Material |
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Teeth Shape Teeth Shape |
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![]() | Trapezoidal |
DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Maximum Temperature Maximum Temperature |
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Minimum Temperature Minimum Temperature |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Color Color |
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![]() | Black |
Teeth Finish Teeth Finish |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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XL Series Timing Belts


Belts combine neoprene with fiberglass reinforcement for quiet operation with high strength. All are XL series (extra light) and have trapezoidal teeth. The teeth are nylon coated to protect the wear surface and minimize friction.
For technical drawings and 3-D models, click on a part number.
XL Series Dust-Free Timing Belts


Abrasion-resistant urethane means these belts don’t create dust while they run. They are XL series (extra light) and have trapezoidal teeth. Reinforced with Kevlar or steel, both materials provide very high strength, low stretch, and excellent shock resistance. Kevlar has higher shock resistance than steel.
For technical drawings and 3-D models, click on a part number.
Belt Trade Number | Outer Circle | Number of Teeth | Pitch | Material | Reinforcement Material | Color | Temperature Range, ° F | Each | |
1/4" Wd. | |||||||||
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250XL025 | 25" | 125 | 0.200" | Urethane | Kevlar | Black | -30° to 180° | 0000000 | 00000 |
5/16" Wd. | |||||||||
250XL031 | 25" | 125 | 0.200" | Urethane | Kevlar | Black | -30° to 180° | 0000000 | 0000 |
3/8" Wd. | |||||||||
250XL037 | 25" | 125 | 0.200" | Urethane | Kevlar | Black | -30° to 180° | 0000000 | 00000 |