BS 1434:1985
Current
The latest, up-to-date edition.
Hardcopy , PDF
English
02-28-1985
Foreword
Committees responsible
Specification
1. Scope
2. Definitions
3. Information to be supplied by the purchaser
4. General
5. Material
6. Tolerances on dimensions and shape
7. Sampling
8. Determination of hardness
Appendix
A. Preferred nominal sizes
Tables
1. Chemical compositions and minimum hardness
2. Permitted proportions of bars of different actual
lengths in any one delivery of mill lengths
3. Tolerances on length for specified lengths
4. Tolerances on length for blanks and segments
5. Tolerances on height
6. Thickness measurement positions for commutator
bar segments or blanks
7. Tolerances on thickness
8. Tolerances on specified angle
9. Tolerances on shape error and shape constants
for the shape of the side faces
10. Maximum deviation from straightness of bar
11. Maximum twist for bars, blanks and segments
12. Preferred heights, H, in mm, of sections for
commutator bars
13. Preferred nominal diameters, in mm, of finished
commutators
Figures
1. Segments
2. Main dimensions of cross sections of commutator
bar segments or blanks and measuring positions for
thickness, angle and shape
3. Deviation from specified angle
4. Tolerance on shape of the convex thick edge
5. Tolerance band for the shape of the thin edge
6. Measuring area for Vickers hardness (referee method)
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