1 Scope
This standard specifies the measuring methods for friction torque of rolling bearings (hereinafter referred to as “bearings”).
This standard is applicable to the deep groove ball bearing, angular contact ball bearing and single-row tapered roller bearing with size range (nominal outside diameter) of 3mm~200mm.
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated reference, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1800.2-2009 Geometrical Product Specifications (GPS) - Limits and Fits - Part 2: Tables of Standard Tolerance Grades and Limit Deviations for Holes and Shafts
GB/T 5800.1-2012 Rolling Bearings - Instrument Precision Bearings - Part 1: Boundary Dimensions, Tolerances and Characteristics of Metric Series Bearings
GB/T 6930-2002 Rolling Bearings - Vocabulary
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 6930-2002 and the following apply.
3.1
starting torque
MQ
torque required for making one bearing ring starting rotating in relation to the other fixed ring
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Measuring Principles and Methods
5 Measuring Conditions
6 Methods for Measurement and Assessment
