To successfully determine the datum, effective or pitch diameter for each pulley by the V-Belts Generator, the nominal dimensions D w , b w , a, h w are used. The nominal belt width b w always corresponds with nominal pulley diameter D w . The pitch diameter D p is determined using the pitch line offset 'a'. The outside (effective) diameter is determined using nominal height h w . For belts that are measured on effective (outside) pulley diameters, the pitch line offset is of a negative value (a < 0) and the nominal height value is zero (h w = 0). See Belt length calculation to get more information about how the pulley diameters are determined.
Note: The belt length measuring system (datum or effective) as well as nominal dimensions b
w
, a, h
w
are given by specific belt type and they are defined in an XML data file in Design Data\Design Accelerator\Tables\Vbelts folder. It is not required from user to modify these properties unless there is a need to add additional belts based on specific manufacturer data.
V-Belt
Grooved Pulley
Flat Pulley
