How to calculate the taper of rubber band by using the diameter of support head

(big head diameter-small head diameter) ÷(2* total taper length) = bevel value. Users can use the formula (big head diameter-small head diameter) ÷(2* total taper length) = bevel value to calculate the taper of the rubber band. Diameter refers to the distance between the center of a plane figure or a solid (such as a circle, a cone section, a ball and a cube) and two points on the side.