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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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  • Model 145 Spring-Loaded Driver Pulleys - Imperial
  • Model 145 Spring-Loaded Driver Pulleys - Imperial-2
Two-Side Moveable
1/3 through 1-1/2 HP
“A” and “B” Belts
      Aluminoline variable speed pulleys are designed for the best possible belt alignment with the least amount of overhung load. Flanges are made of a lightweight, corrosion-resistant aluminum, which is hard-coat anodized for long life. The aluminum flanges provide quiet operation with minimum vibration. These pulleys are used with classical “A” and “B” drive belts. Aluminoline pulleys offer maximum service when lubricated through a convenient grease fitting located on the end of the pulley shaft.

    Belt Selection
      Aluminoline variable speed pulleys are designed to drive standard “A” and “B” section belts. Due to the intermeshing flange design, it is best to use a wrapped belt or one without cogs.

    Adjustable Center Drives
      The typical adjustable center drive consists of the Aluminoline pulley mounted on the motor shaft, a companion sheave on the driven shaft, an adjustable motor base and a belt. Standard “A” and “B” fixed diameter sheaves should be used as driven companion sheaves. Belt alignment will be maintained throughout the speed range because the Aluminoline pulleys are two-side moveable. Due to the minimal bottom contact area of “A” and “B” belts, flat driven sheaves are NOT recommended.
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Keyway Size  (in)

Part Number

Description 

Bore Diameter 

Belt Size

Keyway Size 

Outside Diameter

Max. Pitch Diameter (Dimension PD)

Min. Pitch Diameter (Dimension PD)

N/A 145-1/2-PULLEY N/A 1/2 in N/A A N/A 1/8 x 1/4 in N/A 4.50 in N/A 4.250 in N/A 2.100 in
N/A 145-5/8-PULLEY N/A 5/8 in N/A A N/A 3/16 x 3/32 in N/A 4.50 in N/A 4.250 in N/A 2.100 in
N/A 145-3/4-PULLEY N/A 3/4 in N/A A N/A 3/16 x 3/32 in N/A 4.50 in N/A 4.250 in N/A 2.100 in
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