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Keyway Size  (in)

Item 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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