How to Choose Bushings: What You Should Know

Bushing by Monroe Engineering

Are you looking to buy bushings? Consisting of a cylindrical-shaped sleeve with a wall, they are commonly used to reduce noise and vibrations. A rod-shaped part, for instance, can be inserted through the center of a bushing. The bushing will absorb vibrations produced by the rod.

While most bushings feature a similar design, they are available in different types. There are several things you should look for when choosing bushings.

Lubrucation Requirements

Some bushings require lubrication, whereas others do not. Lubrication will coat the bushing so that it’s better protected against friction. As the rod-shaped part moves inside of bushing, it will generate friction.

Lubrication allows for a smoother movement by reducing friction. Some bushings require manual lubrication. Other bushings are self-lubricating, meaning they’ll automatically distribute the lubricant during operation. Regardless, you should consider the lubrication requirements when choosing bushings.

Wall Material

You should also consider the wall material when choosing bushings. Bushing walls aren’t made of a hard or rigid material. Rather, they are made of an elastic material. The use of an elastic material allows bushings to absorb vibrations. With that said, bushing walls are available in different types of elastic materials.

Wall materials for bushings may include the following:

  • Neoprene
  • Rubber
  • Polyurethane

Standard vs Pillow Block Style

Bushings are available in standard and pillow block styles. Standard bushings are characterized by a traditional cylindrical shape. Pillow block bushings are similar but with a mounting frame. You can install them by driving a fastener through each of the two holes on the side.

Alignment Capabilities

Depending on the application for which you intend to use them, you may want to consider alignment capabilities when choosing bushings. Bushings are commonly used to connect parts that are aligned with other parts. As a connected part becomes misaligned, the bushing’s wall may become thicker. In turn, this helps to further prevent vibration and noise associated with the misaligned part.

Line Reaming Requirements

Something else to consider when choosing bushings is line reaming requirements. Line reaming is essentially the alignment of a bushing and its parts. Some bushings require line remaining, whereas others don’t.

In Conclusion

They may be small, but bushings play an important role in many machines, vehicles and other applications. They are used to absorb vibrations. If left unchecked, vibrations could result in damage to the connected parts. Bushings protect against vibrations and noise thanks to their wall made of an elastic material.

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