ISO-21250-1 › Rolling bearings - Noise testing of rolling bearing greases - Part 1: Basic principles, testing assembly and test machine
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This document specifies:
— basic principles, testing assembly and the test machine for noise testing of rolling bearing greases;
— symbols used in the test methods BQ+, MQ and NQ.
This document is applicable for testing rolling bearing greases, especially of unused grease.
NOTE Suitable greases are greases of NLGI classes 1 to 3 according to DIN 51818[6]. Suitable greases for lubrication of rolling bearings are especially 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[12][13].
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Document Number
ISO 21250-1:2020
Revision Level
1ST EDITION
Status
Current
Publication Date
July 1, 2020
Committee Number
ISO/TC 4