How To Measure Belt Size For Pulley. Calipers work best for measuring this dimension. Rotate the v belt to place the paint mark against the flat surface.
This is the actual length of the belt path. This distance is also known as the center distance. The final measurement is the complete overall width of the pulley.
E section= add 6 to belt number (example e144 = 150 outside circumference) ax section= add 2 to belt number (example ax60 = 62 outside circumference) bx section= add 3 to belt number (example bx50 = 53 outside circumference)
Measure from side to side across where your belt sits, from outside edge to outside edge. Remember pulley 1 is always going to be the largest pulley you have, and you’ll see this as we go through the calculations shortly. How to measure the belt: Measure pulley between flange width.