Model 145 Spring-Loaded Driver Pulleys - Imperial On The Timken Company

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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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Part Number	Description	Bore Diameter	Belt Size	Keyway Size	Outside Diameter	Max. Pitch Diameter (Dimension PD)	Min. Pitch Diameter (Dimension PD)

68514418523	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
68514418525	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
68514418526	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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Keyway Size (in)