BS 3876-5:1990

Committees responsible
Foreword
Specification
1. Scope
2. Definitions
3. General
4. Design considerations
5. Dimensions and shape of pulley components and
    mountings
6. Materials
7. Manufacture
8. Type testing
9. Marking
Appendices
A. Information to be supplied by the purchaser
B. Information to be provided by the supplier
C. Methods of testing suspended pulley assemblies
    and clamps
D. General recommendations for the design and operating
    criteria of pulley assemblies
E. Typical clause relating to inspection that the
    purchaser may choose to write into his order or
    contract for the supply of pulley assemblies and
    clamps to this Part of BS 3876
Tables
1. Dimensions of horizontal spindle pulleys
2. Bearing characteristics and designations
Figures
1. Permitted minimum angular movement of suspended
    pulley assemblies
2. Typical horizontal spindle pulley
3. Testing of a pulley for run-out
4. Test forces for suspended pulley assemblies and
    clamps
5. Relationship between rope tension and resultant
    force on the pulley wheel
6. Relationship between rope speed and roller speed
    (r/min)

Gives requirements for suspended pulley assemblies and clamps for use in colliery track haulage. Applies to suspended pulleys, supplied and used with or without mountings, that are for the support of haulage ropes and which may be used in rope haulage ancillary equipment, mountings, suspended pulley assemblies that comprise the pulleys and mountings, and clamps for suspending assemblies from supporting members. Not intended where rope deflections in excess of 10 degree across a single pulley are required. Covers definitions, design considerations, materials, manufacture, type testing and marking.

This Part of BS 3876 specifies requirements for suspended pulley assemblies and clamps intended for use in colliery track haulage.

This Part applies to:

1. suspended pulleys, supplied and used with or without mountings, that are intended for the support of haulage ropes and which may be used in rope haulage ancilliary equipment, e.g. weight ropes on safety equipment, haulage rope tensioning equipment, etc.;
2. mountings;
3. suspended pulley assemblies that comprise the pulleys and mountings;
4. clamps for suspending assemblies from supporting members.

The suspended pulleys to which this Part applies are not intended to be used where rope deflections in excess of 10° across a single pulley are required. Where rope deflections in excess of 10° per pulley are required, pulleys in accordance with BS 4878 should be used.

NOTE 1 Appendix A gives the information which should be supplied by the purchaser, in his enquiry and/or order for pulleys, mountings and assemblies in accordance with this Part of BS 3876.

NOTE 2 Appendix B gives the information that will be required by the purchaser, to be provided by the supplier, prior to the supply of pulleys, mountings and assemblies in accordance with this Part of BS 3876.

NOTE 3 Appendix D gives general recommendations for the design and operating criteria for suspended pulleys.

NOTE 4 No inspection requirements are specified in this Part of BS 3876. However, a typical requirement that a purchaser may choose to write into his order or contract for pulleys, mountings and assemblies to this Part is given in Appendix E.

NOTE 5 The titles of the publications referred to in this Part of BS 3876 are listed on the inside back cover.