ISO DIS 21250-1
Rolling bearings - Noise testing of rolling bearing greases - Part 1: Basic principles, testing assembly, test machine
|Publication Date:||8 February 2019|
|ICS Code (Rolling bearings):||21.100.20|
This document specifies
- basic principles, testing assembly and the test machine for noise testing of rolling bearing greases;
- symbols used by the test methods BQ+, MQ and NQ.
This document is applicable for testing bearing greases and especially lubricating greases made for rolling bearings1) and testing of unused grease primarily.
1) Suitable greases are greases of NLGI classes 1 to 3 according to DIN 51818 . Suitable greases for lubrication of rolling bearings are especially bearing greases according to ISO 12924 . The test method according to this document delivers meaningful results for rolling bearings, however it can also be applied for greases in similar applications, ,  and .