Variable Speed

Aluminum Variable Speed Sheave 3-1/4 x 3/4" 55492

Single groove aluminum adjustable sheave for 4L - "A" (1/2") & 5L - "B" (21/32") type V-beltsOpening/closing the pulley increases/decreases the speed at which the belt rotatesLight duty applications only*, use cast iron or steel sheaves for harsher...

Aluminum Variable Speed Sheave 3-1/4 x 5/8" 55491

Single groove aluminum adjustable sheave for 4L - "A" (1/2") & 5L - "B" (21/32") type V-beltsOpening/closing the pulley increases/decreases the speed at which the belt rotatesLight duty applications only*, use cast iron or steel sheaves for harsher...

Aluminum Variable Speed Sheave 3-1/4 x 1/2" 55490

Single groove aluminum adjustable sheave for 4L - "A" (1/2") & 5L - "B" (21/32") type V-beltsOpening/closing the pulley increases/decreases the speed at which the belt rotatesLight duty applications only*, use cast iron or steel sheaves for harsher...