The Advantages of Using Rubber Bushes

There are various Anti Vibration products available that can improve the function and lifespan of various systems and machinery. Not only do vibrations cause damage to products, but they can also produce noises which are both uncomfortable and harmful to operators. Because of this, it is important to use the right Anti Vibration products in the right places.

For example, in suspension systems, reducing vibrations is essential to prevent noise and vibrations travelling through both on and off-road vehicles. Rubber bushes are a great and effective product for achieving this.

What is a Rubber Bush?

A Rubber Bush, sometimes referred to as a rubber bushing, is a type of vibration isolator that provides a flexible interface between two rigid parts. The rubber bush acts as a buffer, absorbing and damping energy produced by the interaction of these two parts. It separates the parts while allowing a limited amount of movement thereby minimising vibration and noise.

Rubber bushes usually come in the form of a cylinder, encased in an inner and outer metal. In between these layers is vulcanised and bonded rubber. The metals can be produced in a wide range of materials including mild steel, stainless steel, and aluminium. Bushes are stress relieved after vulcanisation and can be pre-stressed for improved durability. Their dimensions, profile and rubber are designed to suit a specific application using various techniques such as finite element analysis to ensure optimised performance and durability.

Advantages

GMT’s rubber bushes are suitable as mechanical joints on road and rail vehicle suspensions, pivot arms, engine mountings, gearbox mountings, and as captive cab mountings.

Rubber suspension bushes play a critical role in vehicle safety and comfort when driving, used for positioning and aligning suspension and steering components. These include shock absorbers, sway bars, control links and torsion bars. It is important for bushes to be in good condition, to avoid rapid tyre wear and steering or breaking problems.

Using rubber bushes can minimise the noise caused by vibration, remove the need for lubrication. Because of this, they are often preferred over solid connections. Rubber bushes also make great shock absorbers, vibration isolators and abrasion resistors.

Repeated vibrations can be the source of damage to suspension systems, contributing to the weakening of this type of system and surrounding structure. Rubber bushes work to prevent this from happening, minimising the vibrations and their resultant damage.

Rubber bushes can provide a long maintenance free service life. They can also be optimised and tuned to provide specific stiffness characteristics in different directions. They can also provide articulation by way of torsional, conical movements where other anti-vibration products may not be able to do so. Rubber bushes are usually pressed into a housing thereby eliminating the need for the use of separate fixing mechanisms. Where required however, central inner metals can be incorporated into the design to facilitate fixing the inner metal to surrounding structures using bolts.

Where Rubber Bushes Came From

The use of rubber bushings in vehicles has been credited to Walter Chrysler, an American automotive industry executive. Walter encouraged the adoption of rubber vibration isolating mounts to cut down the vibration and noise of vehicles. From then on, rubber bushes were adopted for use in many parts that generate vibration and noise, and are now a conventional method across the automotive and commercial vehicle industries.  

If you require a rubber bush, or would like some more help or information on which to buy, please feel free to contact us. We have a wide range of rubber bushes and other anti-vibration mounts available. If you require rubber bushes for a specific application, we are able to offer a custom service.

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