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Poly-V® and Micro-V® (Multi-Rib®)
Idler (Sheave) and Drive Pulley Sizes

Poly-V Micro-V Multi-rib idler pulleyPoly-V Micro-V Multi-rib idler pulley

Convert units to:    
Part Number OD W Maximum J-ribs
 Multiply Load Rating Specs by 0.75 factor
Poly-V Idler/Drive 1.88" x 0.50" 1.88" 0.70" 6
Poly-V Idler/Drive 1.88" x 0.75" 1.88" 0.97" 9
Poly-V Idler/Drive 1.88" x 1.38" 1.88" 1.56" 15
Poly-V Idler/Drive 2" x 1" 2.00" 1.15" 10
Poly-V Idler/Drive 2.25" x 0.75" 2.25" 0.93" 8
Poly-V Idler/Drive 2.5" x 0.75" 2.50" 0.93" 8
Poly-V Idler/Drive 2.5" x 1" 2.50" 1.18" 11
Poly-V Idler/Drive 2.75" x 0.75" 2.75" 0.93" 8
Poly-V Idler/Drive 2.75" x 0.86" 2.75" 1.05" 9
Poly-V Idler/Drive 2.75" x .1" 2.75" 1.18" 11
Poly-V Idler/Drive 3" x 0.75" 3.00" 1.01" 9
Poly-V Idler/Drive 3" x 1.01" 3.00" 1.18" 11
Poly-V Idler/Drive 3.13" x 0.75" 3.12" 1.11" 10
Poly-V Idler/Drive 3.5" x 0.75" 3.50" 0.98" 9
Poly-V Idler/Drive 3.5" x .97" 3.50" 1.15" 10
Poly-V Idler/Drive 4" x .72" 4.00" 1.06" 9
Poly-V Idler/Drive 4" x .86" 4.00" 1.34" 13
Poly-V Idler/Drive 4" x 1" 4.00" 1.18" 11
Poly-V Idler/Drive 4.5" x .96" 4.50" 1.13" 10
Poly-V Idler/Drive 5" x 1.25" 5.00" 1.56" 15
Poly-V Idler/Drive 5.5" x 1" 5.50" 1.26" 12
Poly-V Idler/Drive 6" x .75" 6.00" 0.99" 9
Poly-V Idler/Drive 6" x 1" 6.00" 1.28" 12
Poly-V Idler/Drive 2" x 1.00" 2.00" 1.00" 9
Poly-V Idler/Drive 2" x 1.25" 2.00" 1.25" 12
Poly-V Idler/Drive 2.5" x 1.00" 2.50" 1.00" 9
Poly-V Idler/Drive 2.5" x 1.25" 2.50" 1.25" 12
Poly-V Idler/Drive 3" x 1.00" 3.00" 1.00" 9
Poly-V Idler/Drive 3" x 1.25" 3.00" 1.25" 12

Idler Pulley Bore Adapters

Idler Pulley Bore Adapters

Drive Pulley Bore Adapters

Drive Pulley Bore Adapters


Idlers pulleys use 6203 bearings -- 12 mm wide, 17 mm bore.

Pulleys are made from nylon reinforced with fiberglass (glass filled nylon).
Idler pulleys use ABEC-1 ball bearings. Click here for Pulley specs.

When ordering by part number, specify either Poly-V Idler or Poly-V Drive, but not both.

All idler pulleys can be converted to drive pulleys with our drive adapters.

Maximum bore diameter:  idler pulleys = 17mm (0.669"), drive pulleys = 25.4mm (1")
For the best in Poly-V (Micro-V, Multi-ribbed) idler sheaves and Poly-V (Micro-V, Multi-rib) drive pulleys, insist on DuraBelt.

Poly-V ® is a registered trademark of the Goodyear Tire & Rubber Company. Micro-V ® is a registered trademark of the Gates Rubber Company. Multirib ® is a registered trademark of ContiTech.

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