NA 118

DIN Standards Committee Rolling Bearings and Plain Bearings


Rolling bearings — Noise testing of rolling bearing greases — Part 2: Test and evaluation method BQ+


This document was prepared by Technical Committee ISO/TC 4, Rolling Bearings. This document covers requirements for the testing assembly and the test machine of method BQ+ to determine and assess the noise characteristics of bearing grease jointly with ISO 21250-1, ISO 21250-3 and ISO 21250-4. This document specifies the testing and evaluation method of rolling bearing grease noise in accordance with the method BQ+.



Planned document number

DIN ISO 21250-2

Project number


Responsible national committee

NA 118-01-04 AA - Tolerances, measuring and gauging principles and methods 

Responsible international committee

ISO/TC 4 - Rolling bearings 


Jonas Boye

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