Description:

Alters motors with a different diameter shaft , Alters pulleys for a different speed or belt. Shaft Sleeve inside diameter 3/4'' , outside diameter 1''. Shaft Sleeve length about 3'' , Keyway slot 1/4'' , Step Key Length about 2''. The sleeve and step key are designed to exact fit on your 3/4 diameter crankshaft with 3/16 keyway and enlarge it to 1 diameter with 1/4 keyway. Works with Gas Engine Crank Shafts to enlarge the crank diameter to fit pulleys, gear boxes etc.