Conventional V-belt is the most common V Belt For Sale type and has been around the longest. The Initial classical V design replaced leather belts by taking over their applications in a wide range of industries, such as agriculture, ventilation, and industrial machinery. Classical V-belts are capable of covering a load range from fractional(less than 1 HP) to 500 horsepower. They are less efficient than narrow V-belt and generally contribute to higher bearing loads. However, classical V-belts have high tolerance for poor operating conditions.
The general part number format is the cross section size and the inside length in inches ( e.g. B50 is a B section of 50 inches inside length ).
General cross sectional dimensions that are used in the US are shown below.