BS 4999-147:1988
Current
The latest, up-to-date edition.
Hardcopy , PDF
English
03-31-1988
National foreword
Committees responsible
Section one - Principal dimensions and tolerances
1 Scope
2 Letter symbols for the principal dimensions of
brushes for cylindrical commutators and slip rings
3 Standard dimensions
4 Marking
5 Limits and tolerances on principal dimensions t and
a of the carbon brushes and brush-holders and on
dimensions r of carbon brushes
6 Recommended combinations of the principal
dimensions t, a and r
Section two - Complementary dimensions of brushes -
Terminations of brushes
7 Complementary dimensions of brushes
7.1 Chamfers of brushes
7.2 Angles for contact and top bevels
7.3 Pressure area
7.4 Depth of insertion q of the flexible (shunt) in the
brush
7.5 Safe length of a worn brush, dimension rm
8 Terminations of brushes
8.1 Terminal types, slots or holes and suitable screw
sizes also the thickness of metal for spade, flag
and double shoe terminals - Box or tubular
terminals
8.2 Spade terminals
8.3 Flag terminals
8.4 Double shoe terminals
8.5 Box or tubular terminals
8.6 Length of flexibles (shunts)
8.7 Details of flexibles (shunts)
8.8 Current capacity and minimum thickness of terminals
Appendices
A Details of brush-holders
B IEC Technical Questionnaire for users of carbon
brushes
C Test procedures for determining physical properties
of carbon brushes for electrical machines
National Appendix
X Other IEC Publications applicable to brushes,
brush-holders, commutators and slip-rings
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