P1 taper bushing,1-3/16" inch bore, carbon steel material, for pulley/sheave. Installation: Insert the bushing into the pulley, aligning the smooth hole of the bushing with the threaded hole of the pulley. When you tighten the bolt on the H-shaped bushing, it will be securely fastened to the shaft. Disassembly: First, remove the two bolts. Align the bolts with the threaded holes of the bushing. When tightening the bolts, the bushing and the pulley will separate.