Belt Drive

9. Power rating ranges for belt types

The power rating charts for the following belt types are supplied with this guide (courtesy of J.H. Fenner Ltd):

For each belt type, the range of powers covered by a given belt section is denoted by a thick line and designated by a code. The elements of the code for Vee and Wedge belts are as follows:

a number (eg: 200): shows the pulley pitch diameter limit
a number (eg: 2): shows the number of belts
a letter (eg: C): shows the belt section size

For Timing belts, the code simply denotes the section size.

Other manufacturers may show similar information in a slightly different format.

The rating chart for Timing belts shows similar information from the same manufacturer. This time, the chart is confined to a particular width of belt (25mm) and wider belts should be uprated pro-rata.

A rating chart for Flat belts is also supplied, courtesy of Stephens Miraclo Belting Co. Belt codes here denote section size, and power ratings are given per unit belt width.