A pulley is a wheel on an axle that is designed to support movement and change of direction of a cable or belt along its circumference. Pulleys are used in a variety of ways to lift loads, apply forces, and to transmit power. These pulleys are called cable pulleys. The groove widths of cable pulleys are inconsistent.
It works uniformly for round belts, metal ropes and steel cables. These pulleys has a 6202 bearing. Its dimension is 11 mm wide and has a 15 mm bore. The V-pulleys work with larger round belts. It contains a cross-section diameters with up to 7/8" (22 mm). Multiply the width at the bottom of the groove (the number in the R-column) by 2 to get the largest diameter that will fit in the pulley.