... -belt pulley Specifications 1) European standard A) V-belt pulleys for taper bushings SPZ, SPA, SPB, SPC; Up to 10 grooves ... belt pulleys 2) American standard A) Sheaves for taper bushings 3V, 5V, 8V B) Sheaves for QD bushings 3V, 5V, 8V C ... M 3) Bore pilot bore, finish bore, taper bore, bore for QD bushing 4) Surface finish paint, phosphate, zinc plate 5) Material ...