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Super-Precision Contact Ball Bearings Attainable Speeds
The attainable speeds listed in the product table are guideline values and are valid under certain conditions. For additional information, refer to Attainable speeds.
Sealed bearings
As there is no friction generated at the seal lip, the attainable speed of a sealed bearing is equivalent to a same-sized open bearing.
Effect of lubrication
The values listed for oil-air lubrication should be reduced if other oil lubrication methods are used.
The values listed for grease lubrication are maximum values that can be attained with sealed bearings or open bearings with an appropriate fill of a suitable, high-quality, soft consistency grease. For additional information, contact the application engineering service.
Adjusted bearings
If, in order to increase system rigidity, single bearings are adjusted so that a heavy preload results, the attainable speeds listed in the product table should be reduced. For additional information, contact the application engineering service.
Bearing sets
If bearing sets with two or more bearings mounted immediately adjacent to each other are used, the attainable speeds listed in the product table need to be reduced. Values for the maximum rotational speeds in these cases can be obtained by multiplying the guideline value listed in the product table by a reduction factor (dependent on the bearing design, preload, and the bearing arrangement) listed in (table 1).
Spacer rings
If the calculated attainable speed is not sufficient for the application, precision-matched spacer rings in the bearing set can be used to increase the speed capability.