This steel shaft sleeve adapts a crankshaft from 5/8” to 3/4” diameter. It comes with 3/16“ keystock.<br> Applications:<br> Alters motors with a different diameter shaft<br> Alters pulleys for a different speed or belt<br> Reduces the necessity of buying a new motor or pulley to maintain existing components and speed/power requirements.<br> Adapts larger wheel bores to smaller axels<br> Works with Gas Engine Crank Shafts to enlarge the crank diameter to fit pulleys, gear boxes etc.<br> Part’s specification:<br> Sleeve inside diameter 5/8”<br> Sleeve outside diameter 3/4”<br> Sleeve length is about 3”<br> Sleeve Keyway slot 3/16”<br> The sleeve and keystock are designed to slip fit on your 5/8” diameter crankshaft with 3/16” keyway and enlarge it to 3/4 diameter with 3/16” keystock.<br>