A63 4L650 V-Belt - 1/2" Top Width X 65" Outside Measurement
Understanding the Part Number
A – The A stands for an “A” section v-belt. This is considered a “Classic” v-belt style that has a top width of ½ (0.5) inches and a thickness of 5/16 (0.312) inches.
63– 63 inches is the inside circumference of the belt. For A-section v-belts, the outside circumference is found by adding 2 inches to the inside length of the belt. So, the outside circumference of the A63 belt is 65 inches (63+2).
Length (inch) 65
Length (mm) 1651
Length Type Outside Circumference
Top Belt Width per strand (inch) 0.5
Top Belt Width per strand (mm) 13
Nominal Thickness (inch) 0.31
Nominal Thickness (mm) 8