EU standard: SPZ, SPA, SPB and SPC.

V-belt pulleys with new type taper-lock bushing has changed the traditional way of transmission. It is easy on and off with high precision and reliable transmission function. It is suitable for any installation of different sizes throught the using of taper-lock bushings of different specifications. It can simplify the desigh procedure, avoid the re-machinery, thus incresed the degree of the commonality and standardization of the V-belt pulleys. It can be adopted widely in the power transmission.