Classical V-belt Sheave Diameters

Three different sheave diameters are used for classical-section V-belts, depending on what information is needed. The table below summarizes the most common uses:

The table below can be used to determine pitch and datum diameters based on the sheave outside diameter.  To calculate pitch or datum diameter, subtract the indicated value in the table from the sheave outside diameter.

Note:  all values are in inches.