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BSI BS ISO 15312:2018

Rolling bearings. Thermal speed rating. Calculation and coefficients
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BSI BS ISO 15312:2018

Rolling bearings. Thermal speed rating. Calculation and coefficients

PUBLISH DATE 2018
PAGES 20
BSI BS ISO 15312:2018

This document defines the thermal speed rating for oil bath lubricated rolling bearings and defines calculation principles for the determination of this parameter. The parameter determined in accordance with this document applies to rolling bearings of the given series and sizes of standard design or of a design that, from a frictional point of view, can be related to a standard design bearing.

In most cases of standard assembly, the permissible temperature determines the maximum operating speed. Heating of the assembly is then generated by the bearing.

Thrust ball bearings are excluded from this document as kinematic effects do not allow the thermal speed rating defined in this document to be applied.

NOTE 1 In Annex A mean values for the coefficients f0r and f1r are given — f0r for calculating viscous losses of oil bath lubricated bearings and f1r for calculating frictional losses of bearings.

NOTE 2 Explanatory notes on the limiting criterion are given in Annex B.

NOTE 3 In Annex C the reference conditions for grease lubrication are defined. The reference conditions are chosen such that the thermal speed rating for grease lubrication is identical to that for oil bath lubrication.

SDO BSI: British Standards Institution
Document Number ISO 15312
Publication Date March 6, 2018
Language en - English
Page Count
Revision Level
Supercedes
Committee MCE/7
Publish Date Document Id Type View
March 6, 2018 BS ISO 15312:2018 Revision
March 5, 2004 BS ISO 15312:2003 Revision