SPB Standard V Belt Pulley

Several factors determine which V-belt type is best suited to a particular drive. These include the application (what is being driven?), the power to be transferred, the desired speed (acceleration or deceleration) as well as the centre-to-centre distance between the pulleys and any possible impact loads. It is also important to know what ambient conditions are present and whether there are any space limitations (what is the maximum permissible diameter and width of the pulleys?).

Depending on the power to be transmitted, several belts can run in parallel on one V-belt drive. Therefore V-belt pulleys are not only available with different pitch circle diameters, but also with multiple grooves. The number of grooves is indicated by the designations simplex, duplex, triplex etc. Pulleys with a diameter of more than 125 mm are statically balanced. On request, the pulleys can be supplied with dynamic balancing to quality class Q 6.3. Dynamic balancing is recommended where the rotational speed is over 30 m/s, or where the diameter/width ratio is below 4 in combination with a rotational speed of over 20 m/s.

V-belt pulleys are mostly made of cast iron (GG) and steel, and are also available in other materials such as aluminium, plastic or stainless steel for specialist applications. Of course, it is also possible to apply a particular surface treatment to the pulleys if the ambient conditions require it.

Common standards for V-belt drives include: DIN 2211, DIN 2217, DIN 7867, ISO 4183, ISO 5290, ISO 1940 and ISO 9981.