BS AU 218:1987
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
Specification for automotive synchronous belt drives
Hardcopy , PDF
15-05-2000
English
29-01-1988
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Foreword
Committees responsible
Specification
Section one. General
1.1 Scope
1.2 Definitions
Section two. Belts
2.1 Belt designation
2.2 Dimensions
2.3 Resistance to ozone
2.4 Resistance to oil
2.5 Resistance to low temperature
2.6 Resistance to high temperature
2.7 Hardness of rubber core
2.8 Tensile strength
2.9 Fabric adhesion
Section three. Pulleys
3.1 Pulley designation
3.2 Groove profile
3.3 Pitch-to-pitch tolerances
3.4 Pulley dimensions
3.5 Material
3.6 Surface finish
3.7 Parallelism
3.8 Taper of outside diameter
3.9 Axial and radial run-out
3.10 Balancing
Appendices
A. Flex fatigue test for belts
B. Measurement of the pitch length of a synchronous
belt
C. Determination of belt resistance to ozone
D. Determination of belt resistance to oil
E. Determination of belt resistance to low temperature
F. Determination of belt resistance to high temperature
G. Determination of tensile strength of belt
H. Determination of fabric adhesion
J. Procedure for checking pulley groove profile
K. Determination of axial and radial run-out
L. Recommendations for design of synchronous belt
drives for internal combustion engines for
automatic purposes
Tables
1. Terms and definitions
2. Nominal belt tooth dimensions
3. Pitch length tolerances
4. Belt width tolerances
5. Minimum tensile strength of belts
6. Loads required to peel fabric from a belt tooth
7. Pulley groove tolerances
8. Pitch and summation of pitch tolerance of pulleys
9. Pulley diameter tolerances
10. Surface finish of synchronous pulleys
11. Axial run-out
12. Radial run-out
13. Test pulley dimensions and characteristics
14. Belt tensions in fatigue test rig
15. Dimensions of belt length measuring fixture pulleys
16. Torque ratings for belts
17. Installation tension for belts
Figures
1. Nominal belt tooth dimensions
2. Pulley groove profile
3. Unflanged, flanged and signle flanged pulleys
indicating position of minimum unflanged width
4. Flange dimensions
5. Limiting speeds above which pulleys require dynamic
balancing
6. Schematic arrangement of fatigue test machine
and pulleys
7. Length measuring fixture
8. Clearance between measuring pulley and belt
9. Measurement of axial run-out
10. Measurement of radial run-out
Requirements for synchronous pulleys and endless belts (of pitch code 2A). Describes a flex fatigue test and gives guidance on system design.
| Committee |
W/-
|
| DevelopmentNote |
This document is no longer used by industry.
|
| DocumentType |
Standard
|
| Pages |
24
|
| PublisherName |
British Standards Institution
|
| Status |
Withdrawn
|
| BS 6889:1987 | Specification for generating racks for synchronous belt drive pulleys |
| BS 4548:1987 | Specification for synchronous belt drives for industrial applications |
| BS 5265-1:1979 | Mechanical balancing of rotating bodies. Recommendations on balance quality of rotating rigid bodies |
| ISO 5296:2012 | Synchronous belt drives Belts with pitch codes MXL, XXL, XL, L, H, XH and XXH Metric and inch dimensions |
| ISO 5294:2012 | Synchronous belt drives Pulleys |
| BS 903-A26:1969 | Physical testing of rubber Determination of hardness |
| ISO 5295:2017 | Synchronous belts — Calculation of power rating and drive centre distance |
| ISO 5288:2001 | Synchronous belt drives Vocabulary |
| ISO 254:2011 | Belt drives — Pulleys — Quality, finish and balance |
| BS 903-A16:1987 | Physical testing of rubber Determination of the effect of liquids |
| ISO 155:1998 | Belt drives Pulleys Limiting values for adjustment of centres |
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