Mechanical tools for mounting and dismounting



Around 16% of all premature bearing failures are a result of poor fitting or using incorrect mounting techniques. Individual applications may require mechanical, heat or hydraulic mounting methods for correct and efficient bearing mounting. Selecting the correct mounting technique for your application will help you extend your bearing’s service life and reduce costs resulting from premature bearing failure, as well as potential damage to the application.

Mounting bearings in a cold condition
Small and medium size bearings are generally cold mounted.Traditionally, the bearing is mounted using a hammer and a length of old pipe. This practice can cause forces to be transmitted through the rolling elements, resulting in damage to the raceways. SKF’s fitting tool helps prevent bearing damage by applying the forces to the bearing ring with the interference fit.


When dismounting bearings, care must be taken not to damage other machine components, such as the shaft or housing, as damage can compromise the machine’s efficiency and lifetime. Bearings are sometimes dismounted to maintain or replace other components of the machine. These bearings are often re-used. Selecting the correct dismounting methods and tools is then essential in reducing the risk of personal injuries and reducing the risk of damaging the bearing, thus allowing it to be used again. Individual applications may require mechanical, heat or hydraulic dismounting methods and tools to allow safe, correct and efficient bearing dismounting.

Mechanical dismounting
Choosing the right puller for the job is critical. The puller type, and its maximum withdrawal capacity are crucial for completing any dismounting job safely and easily. Puller overload can result in breakage of the puller’s arms and/or beam and therefore should be avoided. This breakage can damage the bearing or shaft and can cause personal injury. In general, it is recommended to use a three-arm puller rather than a two-arm puller as the three-arm puller is more stable. Whenever possible, apply the withdrawal force to the ring with the interference fit. SKF offers a complete range of easy-to-use mechanical, hydraulic and hydraulically-assisted bearing pullers for use in many bearing applications.

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By Nurwidodo Estu Aji

One comment on “Mechanical tools for mounting and dismounting

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