rolling-bearings
Bearing nomenclature, bearing number designation, meaning
The nomenclature of most rolling bearings follow a designation system. The complete bearing designation is composed of a basic number with or without one or more supplementary prefixes and suffixes.... [Read more]
Limiting speed (Grease or Oil)
The limiting speed is the highest speed at which a bearing can continuously operate without generating such critical heat.... [Read more]
Friction and temperature rise
Rolling bearings have a much smaller friction coefficient than the slide bearings; Almost all friction loss in a bearing is transformed into heat within the bearing itself and causes the temperature of the bearing to rise.... [Read more]
Selecting a suitable oil for bearing lubrication
Oil lubrication is suitable for applications requiring that bearing-generated heat or heat applied to the bearing from other sources be carried away from the bearing and dissipated to the outside.... [Read more]
Bearing grease lubrication
Bearing grease lubricants are relatively easy to handle and require only the simplest sealing devices; Bearing grease types, quantity, replacement. ... [Read more]
Bearing lubrication
Rolling bearings must be adequately lubricated to operate reliably. The main purposes of bearing lubrication are to reduce friction and wear indside the bearings that may cause premature failure. The effects of bearing lubrication may be briefly explained as follow:
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Bearing size selection based on static load
When any of the following conditions exist, bearing size should be selected or verified based on the static load that the bearing can accommodate, taking into account the possible effects of permanent deformation:
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Bearing dynamic load rating, equivalent dynamic bearing load calculation, formula
Bearing dynamic load rating, C
The basic dynamic load rating, C, is used for calculating basic rating life that rotate under load.
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Bearing life l10, Bearing life calculation, formula
Bearing life
Even in bearings operating under normal conditions, the surfaces of the raceway and rolling elements are constantly being subjected to repeated compressive stresses which causes flaking of these surfaces to occur. This flaking is due to material fatigue and will eventually cause the bearings to fail.
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Selection of bearing arrangement
A bearing arrangement supports and locates a shaft, radially and axially, relative to other components such as housings. Typically, two bearing supports are required to position a shaft.... [Read more]