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Round Idler Pulley and Sheave Sizes

Round Idler Pulley

Convert units to:    
Part Number A B C D E
Idler twin 3/16" x 2.25" dia 2.25" 1.85" 2 at .32" each 1.00" R .160"
Idler 3/16" x 2.5" dia 2.50" 1.75" .36" .65" R .094"
Idler 3/16" x 3" dia 3.00" 2.20" .36" .65" R .094"
Idler 3/16" x 3.5" dia 3.50" 2.75" .35" .65" R .100"
Idler 3/16" x 4" dia 4.00" 3.20" .36" .65" R .094"
Idler 3/16" x 4.5" dia 4.50" 3.70" .36" .65" R .100"
Idler 3/16" x 5" dia 5.00" 4.20" .36" .65" R .100"
Idler twin 1/4" x 2.25" dia 2.25" 1.85" 2 at .32" each 1.00" R .160"
Idler 1/4" x 2.5" dia 2.50" 1.75" .41" .65" R .130"
Idler 1/4" x 3" dia 3.00" 2.20" .41" .65" R .130"
Idler 1/4" x 3.5" dia 3.50" 2.75" .41" .65" R .130"
Idler 1/4" x 4" dia 4.00" 3.20" .41" .65" R .130"
Idler 1/4" x 4.50" dia 4.50" 3.70" .41" .65" R .130"
Idler 1/4" x 5" dia 5.00" 4.20" .41" .65" R .130"
Idler 5/16" x 2.13" dia * 2.13" 1.63" .34" .50" R .170"
Idler twin 5/16" x 2.25" dia 2.25" 1.85" 2 at .32" each 1.00" R .160"
Idler 5/16" x 2.5" dia 2.50" 1.88" .38" .65" R .195"
Idler 3/8" x 2.5" dia 2.50" 1.88" .38" .65" R .195"
Idler 3/8" x 3" dia 3.08" 2.40" .38" .65" R .195"
Idler 3/8" x 3.5" dia 3.50" 2.88" .38" .65" R .195"
Idler 3/8" x 4" dia 4.00" 3.38" .38" .65" R .195"
* Idler 5/16 x 2.13" dia -- available only with .59" (15mm) bore dimeter or .35" (8.9mm) bore adapter.

Maximum bore diameter without an adapter is 17mm (0.669")
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