Tapered Locking Bush Type V-Belt Pulleys use a taper-lock bushing for quick, precise mounting on standard shafts without machining. The pulley bore accepts a Taper Lock bush (1108, 1610, 2012, 2517, etc.), providing a concentric, keyed fit that transmits torque reliably. Available in SPZ, SPA, SPB, SPC and classical V-belt profiles for industrial drives, fans and compressors.