SKF MECHANICAL TOOLS

 SKF MECHANICAL TOOLS

 Fitting tools and pullers for mounting and dismounting of bearings

Precautions when mounting bearings in a cold condition

Premature bearing failure can result from damage incurred when a bearing is incorrectly mounted.
Typical problems that can cause premature failures are:

Damage caused during the fitting procedure
Incorrect sized shafts and housings i.e. too loose or too tight
Retaining lock nuts coming loose in operation
Burred and damaged shaft and housing seats and shoulders
Incorrectly mounted bearings

Interference fits - parallel shafts
Interference fits - parallel shafts

Interference fits - tapered shafts
Interference fits - tapered shafts
Bearing pullers for safe and easy dismounting of bearings
SKF supplies a wide range of pullers for mechanical dismounting of bearings. In some cases they can also be used to pull couplings, gear wheels and other machinery components.

Puller selection
There are three ground rules when selecting a puller:
1. Inspect the application to determine the type of puller required. Select the appropriate puller type for the said application.
The types of pullers are:
a. External pullers.
Puller that reach behind the component from the outside.
b. Internal pullers.
Puller that reach through the bore of a component and grip it from the inside.
c. Blind housing pullers.
Pullers that are attached to the bearing between the two bearing rings.
2. Make sure the puller opens sufficiently to grip the component and that there is enough space around the component to attach the puller.
3. Select a puller that can generate a higher maximum force than is required by the application. The required pulling force depends on the mating surface area, the interference fit, the way of attaching the puller and other influences such as fretting corrosion.