Tensioner & Idler bearings

Technical Information

Timing Belt System

A timing belt camshaft drive system comprises of belt, drive and driven pulleys, idlers, and tensioner. Tensioner & idler are not a power transmission component. They provide the life-of-engine tension control when installed and additional belt wrap.

1 – Cam Shaft

2 – Idler

Generally, located on the tight-side, it increases the belt-wrap angle of component to prevent tooth skip belt span vibration.

3 – Tensioner

Generally, located on the slack-side, it contributes synchronous driving cam and crank for providing initial belt tension of system.


Structure

A tensioner is one of automotive components which applies a force to create or maintain engine belt tension. There are several types of tensioners.
Fixed tension type, spring tension type, and hydraulic type.
Fixed type : T/I
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Hydraulic type : HAT

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Spring type : TBT

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Spring type : ADT

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Product Types-For Timing System

Idler
Outer ring & Pulley Integrated
Inner ring & shaft integrated
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Tensioner
Inner ring & shaft integrated
Steel Pulley with bracket
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Idler
Inner ring & shaft integrated
Steel Pulley
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Tensioner
Ball bearing type
Steel Pulley & shaft with eccentric hole
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Product Types-For Accessory System

Flat Steel Pulley
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Flat Plastic Pulley
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Groove Steel Pulley
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Groove Plastic Pulley
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Function

  • Provides constant tension to the belt to prevent slip or noise
  • Prevents belt tooth skip
  • Dampens belt vibrations caused by engine firing
  • Compensates for effects of engine thermal expansion and contraction on timing drive

Advantage

  • Wide range of applications
    (Timing belt system & accessory belt drive system)
  • GMB tensioner and idler bearings have met rigorous requirements from car manufacturers

OEM Supplier You Can Trust

Since 1943, GMB has been manufacturing precision Automotive parts that power millions of vehicles around the world.