Tensioner & Idler bearings
Technical InformationTiming 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
Hydraulic type : HAT
Spring type : TBT
Spring type : ADT
Product Types-For Timing System
Idler
Outer ring & Pulley Integrated
Inner ring & shaft integrated
Inner ring & shaft integrated
Tensioner
Inner ring & shaft integrated
Steel Pulley with bracket
Steel Pulley with bracket
Idler
Inner ring & shaft integrated
Steel Pulley
Steel Pulley
Tensioner
Ball bearing type
Steel Pulley & shaft with eccentric hole
Steel Pulley & shaft with eccentric hole
Product Types-For Accessory System
Flat Steel Pulley
Flat Plastic Pulley
Groove Steel Pulley
Groove Plastic Pulley
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
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Since 1943, GMB has been manufacturing precision Automotive parts that power millions of vehicles around the world.