What does a idler pulley do?

  1. Supports and guides the belt.
  2. Provides proper tension on the belt.
  3. Reduces wear on the belt.
  4. Helps maintain the proper alignment of the belt.
  5. Minimizes vibrations in the belt system.

What happens when an idler pulley goes bad?

  1. Causes squeaking or chirping noises.
  2. Leads to belt slipping or misalignment.
  3. Increases wear on the belt.
  4. Results in decreased performance of the system.
  5. Can ultimately lead to system failure.

Does idler pulley need to be replaced?

  1. If there are signs of wear or damage.
  2. When the pulley is not spinning smoothly.
  3. As part of regular maintenance schedule.
  4. After a certain number of miles driven.
  5. tension pulley

  6. When there are noticeable vibrations in the system.

Advantages of idler pulleys:

  1. Improve belt performance and longevity.
  2. Enhance system efficiency and reliability.
  3. Reduce maintenance costs over time.
  4. Help prevent unexpected breakdowns.
  5. Contribute to smoother operation of the system.

Process of Compound Pulley


The mold for the compound pulley is carefully designed to ensure precision and accuracy in the final product.


The raw materials are poured into the mold and allowed to cool and solidify to form the pulley shape.

Raw Materials

High-quality materials are used to ensure durability and strength of the compound pulley.


The production process involves meticulous attention to detail to create a flawless product.


Each compound pulley undergoes rigorous testing to ensure it meets quality standards.

Antirust treatment

Special treatment is applied to the pulley to prevent rust and corrosion, increasing its lifespan.

Seperate inspection

Individual inspection is carried out to guarantee the quality and performance of each pulley.


Each pulley is marked with identification codes for traceability and quality control purposes.

spa pulley

What is the function of the tensioner and idler pulley?

  1. Provide proper tension on the belt.
  2. Support and guide the belt for smooth operation.
  3. Help maintain the alignment of the belt system.
  4. Reduce wear and vibrations in the system.
  5. Ensure efficient power transmission in the system.

tension pulley

How to stop a idler pulley from squeaking?

  1. Apply lubricant to the pulley.
  2. Check for misalignment and correct it.
  3. Replace the pulley if it is damaged or worn out.
  4. Ensure proper tension on the belt.
  5. Regularly inspect and maintain the pulley.

About HZPT

HZPT, established in 2006, is a leading manufacturer of precision transmission components based in Hangzhou. We specialize in producing various intricate parts and offer customizations to meet your needs. Our overseas sales team ensures efficient production and delivery of high-quality products at competitive prices. We have a strong reputation in Europe and America and provide top-notch services to our esteemed clients.

V Pulley