Workshop «Shaft alignment and dynamic balancing»
We invite technical specialists to participate in the training course on the topic «Shaft alignment and dynamic balancing» which will take place on 04-05 April, 2019 in Germany (Lubeck). The workshop is arranged for specialists in quality, service engineers, mechanics and power engineers who are responsible for the reliability of machines and industrial equipment.

BALTECH GmbH
Kronsforder Allee 45,
23560 Lübeck
Germany
Tel: +49 (0) 451-370-87-700
E-Mail: info@baltech.biz
 
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Articles -- Tool kit


How to properly install bearings?

The main question of a mechanic is how to install a bearing without damaging it. In case of interference fit it is recommended to use the induction heaters, for example, BALTECH HI-1650. The heating will cause the bearing inner ring extension and the mounting will take place without any special forces applied. A very frequent question is how to properly install a bearing using oil bath. In this case it is necessary to replace the whole lubricant, and use of the oil bathe for close bearings is unacceptable!

Another frequent question is how to install the bearing into a housing using standards tools. Please note, that the installation force should not be transmitted through the rolling elements otherwise they will be pressed into the bearing races which will result in the bearing improper operation, rapid wear and scabs. The simpliest way to install the bearing into a housing without damaging it is use of the the bearing mounting toll kit BALTECH TOOLS, which contains a set of mandrels and sleeves and a soft shock- proof material for standard bearing sizes.

According to the practical experience of the specialists of the BALTECH technical service department who perform everyday technical diagnostics (vibration analysis, thermal imaging diagnostics, oil analysis) and repair of industrial equipment , improper mounting of bearings and lack of appropriate installation tool kit lead to approximately 16% of all premature failures. The bearing mounting should be conducted according to the following requirements: the parts should be prepared to the mounting; the requirements to the mounting surfaces should be considered, a proper installation scheme of the bearing and a modern tool kit should be used.

The rolling element bearing life is the number of revolutions made by one ring relative to another one before any evidence of material fatigue of the ring or rolling elements appears.

The bearing service life is time during which the bearing under certain production conditions will operate normally.

In other words, the rolling element bearing life is an idealized estimated value used for comparison of two and more identical bearings. The bearing service life is a value that indicates how long under certain production and operation conditions the bearing will operate before its damage.

In most cases the actual service life of the bearing can exceed the estimated life if the following conditions are observed: if the bearing was not damaged before its use, if the bearing was installed properly, if a proper clean lubricant was used, if there were no ring deformations caused by misalignment of built-in shafts and rotor unbalance.