Page 10 - SKF_Maintenance_and_Lubrication_Products

SKF methods and tools

Mounting Dismounting

Around 16% of all premature bearing failures are a result of poor fitting or When dismounting bearings, care must be taken not to damage other
using incorrect mounting techniques. Selecting the correct mounting machine components, such as the shaft or housing, as damage can
technique for your application will help you extend your bearing’s service compromise the machine’s efficiency and lifetime. Individual applications
life and reduce costs resulting from premature bearing failure, as well as may require mechanical, heat or hydraulic dismounting methods and tools
potential damage to the application. to allow safe, correct and efficient bearing dismounting.

Mounting bearings in a cold condition Mechanical dismounting
Small and medium size bearings are generally cold mounted. Traditionally, Choosing the right puller for the job is critical. The puller type, and its
the bearing is mounted using a hammer and a length of old pipe. SKF’s maximum withdrawal capacity are crucial for completing any dismounting
fitting tool helps prevent bearing damage by applying the forces to the job safely and easily. Whenever possible, apply the withdrawal force to the
bearing ring with the interference fit. ring with the interference fit. SKF offers a complete range of easy-to-use
mechanical, hydraulic and hydraulically-assisted bearing pullers for use in
Mounting bearings using heat many bearing applications.
Oil baths are often used for heating bearings prior to mounting.
However, this method can contaminate the bearing, resulting in premature Dismounting using heat
bearing failure. Today, induction heating is the most common technique for The inner rings of cylindrical roller bearings generally have a tight
heating bearings since it allows a high degree of controllability, efficiency interference fit, which requires high forces to dismount. Using heating
and safety. equipment facilitates easy and quick dismounting while reducing the risk of
damage to the ring and shaft. SKF offers a range of heating equipment for
Mounting bearings using hydraulic techniques dismounting cylindrical roller bearing inner rings.
SKF has pioneered the use of hydraulic techniques, such as the SKF Oil
Injection Method and the SKF Drive-up Method, for mounting bearings. Dismounting bearings using hydraulic techniques
These techniques have helped to simplify bearing arrangements and The SKF hydraulic techniques are often the preferred method for dismounting
facilitate correct and easy mounting. larger bearings as well as other components. These techniques, which employ
hydraulic pumps, nuts and oil injectors, allow the application of substantial
forces to dismount bearings or other components.

Online mounting and dismounting instructions
At skf.com/mount, SKF offers a unique web-based, free of charge
information service for the mounting and dismounting of SKF bearings
and bearing housings. This service provides step-by-step instructions for
mounting and dismounting. The system also provides information on
proper tools and lubricants. With this free internet service, SKF’s
expertise is at your fingertips around the clock worldwide.

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