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Smarter Bearing Selection Is Here

The Timken ® Syber ® Bearing System Designer Tool now features Smart Selection, enabling users to find the right bearing faster by filtering options based on target life and key dimensions.

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Analyze Bearing Performance in an Application with Timken ® Syber ® Bearing System Designer

A powerful software tool that combines calculators and configurators to assist you with application design, bearing selection, installation, and troubleshooting. It’s free, easy-to-use, and accessible 24/7.

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Simplified Gear Force Analysis

Alex Waye, Timken Application Engineer, shows you how to instantly compute tangential, radial, and axial forces for better design decisions.

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  • Hexadrive Series-2
  • Models 21901, 21902, 21903 Spring-Loaded Driver Pulleys - Imperial-2
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Keyway Size  (in)

Part Number

Description 

Bore Diameter 

Keyway Size 

Type

Max. Pitch Diameter (Dimension PD)

Ratio

UPC Number

N/A 21903-3/4-PULLEY N/A 3/4 in N/A 3/16 x 3/32 in N/A Adjustable Center - Driver N/A 8.030 in N/A 3:1 N/A 21139
N/A 21903-7/8-PULLEY N/A 7/8 in N/A 3/16 x 3/32 in N/A Adjustable Center - Driver N/A 8.030 in N/A 3:1 N/A 21141
N/A 21903-1"-PULLEY N/A 1 in N/A 1/4 x 1/8 in N/A Adjustable Center - Driver N/A 8.030 in N/A 3:1 N/A 21142
N/A 21903-1-1/8-PULLEY N/A 1 1/8 in N/A 1/4 x 1/8 in N/A Adjustable Center - Driver N/A 8.030 in N/A 3:1 N/A 21143
N/A 21903-5/8-PULLEY N/A 5/8 in N/A 3/16 x 3/32 in N/A Adjustable Center - Driver N/A 8.030 in N/A 3:1 N/A 37323
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