v belt pulley

V-belt pulleys are for use with V-belts to transfer motion from motors to belts, fans, and pumps. They have V-shaped grooves that correspond with V-shaped belts to prevent slippage and misalignment. V-belt pulleys provide maximum friction and torque in compatible V-belt drive systems.

V-belt pulleys (also called vee belt sheaves) are devices which transmit power between axles by the use of a v-belt, a mechanical linkage with a trapezoidal cross-section. Together these devices offer a high-speed power transmission solution that is resistant to slipping and misalignment.

V-belt pulleys are solely used for transmitting power between two parallel axels. The most notable difference between a v-belt pulley and other types of pulleys (round belt, flat, etc.) would be the geometry of the groove or grooves located around the circumference of the pulley; these grooves guide and gain traction on a v-belt.

V-belt transmissions are a notable upgrade from round or flat belt transmissions; v-belts provide excellent traction, speed, and load capabilities, while enjoying an extended service life with simple replacement. Heavy loads actually increase transmission efficiency since they wedge the belt further into the pulley's groove, thereby improving friction

V-Belt Pulley Specifications

The following parameters are important when selecting v-belt pulleys.

Belt profile, or the style and sizes of the belt being integrated.

Outside diameter, or the distance across the pulley when measured between groove edges.

Center diameter is the distance or distances between the shafts of the pulleys in the transmission. V-belt transmissions are limited by center distances, which must be no more than three-times the diameter of the largest pulley, lest significant slipping can occur.

Grooves, the grooves located on the pulley, including the number, and angle and width of the flanges.

Pitch diameter, or the diameter of the pulley where the belt is engaged, and is critical to the drives strength-to-weight ratio.

Arc of contact, the degree of which the belt wraps around the pulley.