What is the purpose of the tapered bushing? Tapered bushings are typically utilised to mount pulleys, sprockets and pulleys on shafts. They are split, have no flange bushings, use screws to maintain the shaft, and offer very good clamping drive. Tapered bushings are typically used for recessed ceiling lights simply because they have an even mounting spacing and, if set up properly, they are very effective in substantial torque programs.