flat drive belt system

Understanding flat belt pulley

In transmission systems, flat belt pulleys are suitable. Flat belts power these, which run at high speeds and are utilized in low-power applications such as textiles, papermaking, computer printers, and conveyors.

The flat belt is less expensive than the serpentine belt pulley’s belt. Flat belts do not require a grooved flat belt pulley because they run on flat pulleys and idlers. For the back of a traditional V-belt, a flat pulley idler can be used. One benefit of employing this pulley is that in the event of excessive torque, the belt may slip, preventing harm to other equipment.

flat drive belt system

Read more: Difference between drive belt and timing belt


Types of Flat belt Pulleys

The common types of flat belt pulleys include:

  • Split or Cast-iron pulley
  • Paper pulley
  • Steel pulley
  • Wooden pulley


Split or Cast-iron pulley

These types of pulleys have circular rims and are made of cast iron. The face and hub of this sort of pulley are made up of two components. Its unique feature is that it may be utilized on both large and small pulleys. It’s a component of a saw machine.

They’re used in a variety of industries. Cast iron pulleys are commonly utilized in the oil and engineering industries. The pulley is affordable for any industry due to its inexpensive cost.

Paper pulley

The outer section of the paper pulley is constructed of compressed paper fibers, while the interior part of the pulley is composed of metal. When the center-to-center shaft distance is minimal, this type of pulley is used with an electric motor in a belt transmission system.

Steel pulley

Steel sheets are used to make these pulleys, as the name implies. This type of pulley is made up of two joined pieces. Steel pulleys come with replaceable bushings that fit shafts of various sizes.

With a leather belt, a steel pulley achieves a coefficient of friction that is at least equal to that of a cast-iron pulley. They are more robust, stronger, and lighter (up to 40% to 60% lighter) than iron pulleys. These pulleys are usually made to operate at high speeds.

Wooden pulley

Wood pulleys are lighter than cast iron or steel pulleys and have a higher coefficient of friction. They’re made of maple that’s been cut into chunks and bonded together with a lot of force.

These pulleys can be solid or divided, with an iron hub attached by screws or adjustable bushings to prevent friction from forming between them and the shaft. Because the contact arc between the pulley face and the belt is limited, they are usually employed in motor drives.

Read more: Types of pulleys and their working

Advantages and disadvantages of Pulleys


  • When using pulleys to lift big loads, the effort is minimized, resulting in mechanical advantage.
  • Lifting items is a noiseless procedure since it is done silently.
  • It has the ability to alter the direction of the applied force.
  • The amount of actual force required to lift large objects is reduced as a result.
  • Pulleys are less expensive and easier to make than gears.
  • Because the pulley system has moving parts, no lubrication is necessary.


  • When it works to transfer motion, it employs friction, so there’s a chance it’ll slip.
  • It’s not designed for high-rpm, high-power transfer.
  • When working for an extended period of time, the rope creates fatigue and crawls.
  • The lifting distance can be extended while lifting big goods.
  • When compared to gear systems, pulley systems are less reliable.


Read more: Different types of Chain Drive

That is all for this article, where the definition, working, and types of flat belt pulley are been discussed. I hope you learn a lot from the reading, if so, kindly share with other students. Thanks for reading, see you around!