Dimensions, marking and testing of carbon brushes and dimensions of brush-holders for electrical machinery

IEC 60136:2024 applies primarily to brushes and brush-holders for cylindrical commutators and slip rings for electrical rotating machines. Some clauses of this document may cover other configurations, such as flat commutators or plain disks. It defines the dimensions of brushes and their components, together with their tolerances:

- dimensions of brush block (t, a, r),

- angles α and β,

- chamfer,

- flexibles (shunts),

- standard terminals.

It also covers the conventional designation of principal dimensions, the marking of brushes and the testing methods for the qualification of brushes after their manufacturing (except the brush grade material, covered by IEC 60413). This third edition cancels and replaces the second edition published in 1986 and Amendment 1:1995. This edition constitutes a technical revision.

Please refer to the Foreword of the document for a comprehensive listing of the changes with respect to the previous edition.