Tensioners and Idlers

Precision-Engineered Auto Belt Tensioners by PIX

Manufactured in state-of-the-art facilities with fully integrated in-house production, the PIX tensioner is developed under strict quality control. Advanced testing facilities validate performance for durability, vibration damping, alignment accuracy, and long-term reliability.

PIX Auto Belt Tensioners are designed to deliver consistent belt tension, eliminating slip, noise, and vibration for a noticeably smoother driving experience.

Built to adapt automatically, these tensioners compensate for belt stretch and wear over time. This ensures precise alignment and reliable performance throughout the service life of the belt, reducing maintenance needs and improving overall system efficiency.

The result is a high-performance, long-lasting tensioner engineered for reliability, efficiency, and peace of mind, backed by PIX’s commitment to quality and innovation.

Necessity of Auto Belt Tensioners

  • Maintain correct alignment with the Belt
  • Automatically maintains correct accessory Belt tension
  • Dampens normal accessory system vibrations
  • Eliminates need to adjust / re-tension the Belts
  • Prevents Belt slip (noise/excessive Belt-wear)
  • Indicates excessive Belt stretch (replacement)
  • Extends accessory system component's life
Auto Belt Tensioner

Features:

Maintains proper tension

Keeps the drive belt at the correct tension to prevent slipping and ensure efficient power transfer, and also automatically adjusts for belt stretch and wear, maintaining consistent performance over time.

Reduces vibration

Dampens vibrations from the engine, helping to prevent wear on both the belt and components. Helps to reduce belt squeal and other noises by keeping the belt under optimal tension and preventing slack.

Improves Belt life

Helps maximize the lifespan of the belt by ensuring it's always properly tensioned.

Ensures proper alignment

Keeps the belt aligned with the pulleys to prevent misalignment.

Promotes drive components' efficiency

Contributes to the smooth operation of the accessory drive system (e.g., alternator, water pump, power steering) by ensuring optimal tension.

Critical for engine performance

Plays a key role in the overall efficiency and longevity of the engine's accessory drive system.

System tuning

Ensures proper accessory drive function.

IDLER PULLEY

PIX Idler Pulleys are meticulously crafted to meet or exceed standard specifications, offering both plastic and steel options. This versatility ensures that each pulley is perfectly suited to its specific location on the engine, considering factors such as heat exposure and system tuning.

Each pulley is engineered with precision. Plastic pulleys are manufactured using glass-reinforced Nylon 6/6, offering superior dimensional control and surface durability. They are ideal for both backside and groove-side applications and feature a moulded-in ball bearing for a precise fit and extended service life.

Steel pulleys are produced through precision steel stamping or machining with a close-tolerance ball-bearing pocket. Most pulleys are coated with electro-deposited epoxy for excellent corrosion resistance and feature a crowned running surface to aid in proper belt tracking, ensuring smooth operation and long pulley life.

Idler Pulley

Features:

Standard specifications

Manufactured to meet or exceed industry standards for reliable performance.

Material variance

Available in plastic or steel options to suit different engine conditions.

Design efficiency

Engineered for optimal performance, durability, and smooth operation.

Sealed bearings

Service-free ball bearings ensure extended operational life.

Product Selection Dashboard

Belt Selection
Guide

 Select Belt based on construction type

Drive Design
Calculator

 Select Belt based on drive data

Optimal Drive
Configurator

 Select Belt based on cost ownership

Specification
Sheet Generator

 Create product data sheet on demand

Frequently Asked Questions

An auto belt tensioner is a device that automatically maintains the correct tension on an engine drive belt, compensating for belt stretch and wear to ensure smooth and reliable operation.
It prevents belt slip and noise, maintains proper belt alignment, dampens accessory system vibrations, and eliminates the need for manual belt re-tensioning.
By keeping the belt under constant, optimal tension, it reduces uneven wear and stress, helping extend belt life and protect accessory components.
PIX auto belt tensioners use a robust torsion spring design that improves alignment and durability while eliminating the need for additional friction-reducing components.
An idler pulley guides and supports the drive belt, helping maintain correct belt routing, alignment, and smooth operation within the engine accessory drive system.
Idler pulleys reduce belt vibration, improve belt tracking, and help maintain consistent belt contact with other components, contributing to reliable and quiet engine operation.
PIX idler pulleys are available in glass-reinforced Nylon 6/6 for lightweight, durable performance, and precision-machined or stamped steel for high-heat and demanding engine conditions.
They feature sealed, service-free ball bearings, corrosion-resistant coatings, and crowned running surfaces that promote proper belt tracking and reduce wear.
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