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Tensioner bearing
Idler bearing at tight side) There are various styles according to engine types. Functions To provide belt with tension To transfer driving force from crankshaft To prevent belt slippage To prevent noise caused by off-line belt To minimize space of belt layout.
happens if the tensioner fails?
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When a timing belt tensioner fails, it loses tension. As a result, the timing belt becomes loose and the valve timing can be thrown off. This leads to engine performance issues. So if any suspicion arises that the timing belt tensioner has failed, it's important to check the tensioner and replace it if necessary.
tensioner used for?
A tensioner maintains the correct amount of tension on the belt at all times throughout its duty cycle. It also helps protect other components such as the alternator and water pump from undue stress and premature failure. In addition, a tensioner is a relatively inexpensive part to replace.
tensioner bearing same as idler bearing?
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Of these, in the timing belt mechanism, the type with a slotted hole in the inner ring or a bracket for tension adjustment is sometimes called the "tensioner bearing," and the type without an adjustment mechanism is sometimes called the "idler bearing."
Types of tensioners
Fixed tensioners , once mounted, cannot be adjusted further. They must be remounted to alter tension. A variation is a specially compounded rubber wheel that can provide some take up while in a fixed position. Adjustable tensioners allow pulleys and sprockets to pivot or slide
Bolt tensioners are devices designed to apply a specific tension to a bolt. The device may be either removed once the actual nut is threaded into place or left in place, in the case of a hydraulic nut.[1]
The belt or chain tension on a single-speed bicycle can be maintained by either setting the fixed horizontal position of the rear sprocket or the front chainring horizontally, or by a separate tensioner that pushes perpendicular to the chain with either a fixed position or spring tension.[2]
The serpentine belt and the timing belt or chain on an automobile engine may be guided by an idler pulley and/or a belt tensioner, which may be spring-loaded, hydraulic, or fixed.[3]
The chain tension of a chainsaw may be adjusted with a chain tensioner.[4]
A marine riser tensioner is a device used on an offshore drilling vessel that provides a near-constant upward force on the drilling riser independent of the movement of the floating drill vessel.
A guideline tensioner is a hydropneumatic device used on an offshore drilling rig that keeps a positive pulling force on the guidelines from the platform to a template on the seabed.
Overhead electrical wires may be kept in tension by springs or weights.
Conveyor belts
Chair lift and gondola lift cables
Certain wood trusses, such as the beam tensioner truss picture below.