2.Process: sand mold casting,machining

 3.Bore: pilot bore, finished bore, taper bore, bore for QD bushing

 4.Surface finish: black oxide,paint, phosphating

 European standard:    

a) V-belt pulleys for taper bushings: SPA, SPB, SPC,SPZ,groove up to 10

b) Adjustable speed V-belt pulleys and variable speed pulleys   

c) Flat belt pulleys and conveyor belt pulleys

American standard:   

a) Sheaves for taper bushings: 3V, 5V, 8V    

b) Sheaves for QD bushings: 3V, 5V, 8V   

c) Sheaves for split taper bushings: 3V, 5V, 8V