BS 4878:1973

Cooperating organizations
Foreword
Specification
1. General
1.1 Scope
1.2 Definitions
2. Pulleys
2.1 General
2.2 Materials
2.3 Rim section
2.4 Hubs
2.5 Machining
2.6 Keyways
2.7 Spokes
3. Shafts
3.1 Material
3.2 Machining
3.3 Dimensions and tolerances
3.4 Bearing pedestal centres
4. Bearing pedestals
4.1 General
4.2 Material
4.3 Machining
4.4 Dimensions and tolerances
5. Bearing bushes
5.1 Material
5.2 Machining
5.3 Dimensions and tolerances
6. Rolling bearings
6.1 Bearings
6.2 Seals
6.3 Bearing lubrication
7. Keys
7.1 Details
8. Bolts for split pulleys
8.1 Bolts
8.2 Nuts
8.3 Washers
9. Workmanship
9.1 Details
10. Inspection
10.1 Purchaser's rights
11. Protective coating
11.1 Details
12. Marking
12.1 Details
13. Information to be proved with order
13.1 Details
Appendix
A. Notes on the determination of minimum pulley
    diameters
Tables
1. Pulley classification
2. Details of spokes
Figures
1. Rim section (one-piece solid type pulley) for ropes
    of 19 mm diameter and under
2. Rim section (spoked type pulley) for ropes of 22 mm
    and under
3. Rim section for ropes of 14 mm }
    to 38 mm diameter (inc.) }
4. Pulleys 600 mm (2ft) and 750 mm } Internal
    (2ft 6in) diameter } rolling
5. Pulley 900 mm (3ft) diameter } bearings
6. Solid hub and shaft arrangement }
7. Split hub and shaft arrangement }
8. Pulleys 600 mm (2ft) diameter and }
    750 mm (2ft 6in) diameter } External
9. Pulley 900 mm (3ft) diameter } plain
10. Solid hub and shaft arrangement } bearings
11. Split hub and shaft arrangement }
12. Pedestal
13. Bearing housing
14. Bush and thrust washer
15. }
16. } Graphs showing pulley/rope diameters
17. }
18. }

Requirements for pulleys 600 mm to 2100 mm diameter incorporating rolling bearings in boss; also 600 mm and 1350 mm diameter with bearing bushes in associated pedestals. Specifies pulley classification, particular design criteria, shafts, pedestals, bearings, workmanship, inspection and marking. Includes explanatory appendix, graphs and several illustrations.

This British Standard specifies requirements for a range of haulage pulleys (with shafts) and pedestals designed to incorporate, appropriately, either rolling bearings or plain bearings.

NOTE The titles of the British Standards referred to in this standard are listed on the inside back cover.