Tapered Bushing Sprockets (TL) Bushing-Bore Sprockets for ANSI Roller Chain. Alter bore size without 15a514bb451d65e387e2a9cf1d24b94b.thumbreplacing your sprocket.Easy to set up, Taper-Bushed Sprockets give you the flexibility to utilize the same sprocket with different shaft diameters. chain sprocket Purchase Taper-Bushings(Marketed separately) to match the bore sizes you need. Use with ANSI single and double-strand chain. These metal sprockets and bushings fulfill all ANSI requirements.