Pulleys

Pulleys

A pulley is a wheel or sheave with a groove designed to fit either a belt, rope or cable. In power transmission, pulleys will most often utilize a belt. A drive utilizing a pulley system is characterized by two or more pulleys in common to a belt. A pulley or belt drive is a method of transferring rotary motion between two shafts. A pulley drive includes one pulley on each shaft and one or more continuous belts over the two pulleys. This allows for mechanical power, torque, and speed to be transmitted across axes and, if the pulleys are of differing diameters, this ratio creates a mechanical advantage.

A pulley drive is similar to a chain or gear drive, except the ratio and speed reduction is accomplished through differing pitch diameters of the pulleys rather than by the number of teeth on a sprocket or gear. The motion of the driving pulley is, generally, transferred to the driven pulley via the friction between the belt and the pulley.  Synchronous/timing belts have teeth and therefore do not depend on friction to transmit motion.

There are many advantages to a pulley or a belt drive:

  • Flexible equipment design
  • Limit shock and vibration
  • Driven shaft speed easily changed by changing pulley size
  • No lubrication
  • Easily maintained
  • Quiet operation
  • Standardized from stock bored to size or bushing style

Here is a list of Manufacturers / Brands that we represent:

  • Martin
  • Regal PTS (Browning)
  • Baldor/ Dodge
  • Carlisle/ Dayco
  • Jason
  • Bando
  • Brecoflex
  • Phoenix
  • American Metric
  • SKF
  • Altra Motion (TB Woods)

You can learn more about our Manufacturers / Brands by clicking on the following links: