BS 3790:1981

Foreword
Cooperating organizations
Specification
1. Scope
2. References
3. Definitions
4. Wedge belts and V-belts
5. Grooved pulleys
Appendices
A. Recommendations for drive design
B. Recommended practice for installation tension in
     belt drives and calculation of resultant force
     imposed in the shaft
C. Storage of belts
D. Tests for electrical resistance of belts
E. Tests for fire resistance of V-belts
Tables
1. Belt cross section dimensions
2(a) Tolerances and force requirements when measuring
      new belts
2(b) Dimensions of pulleys for measuring new wedge
      and V-belts
3. Standard pitch lengths of wedge belts and V-belts
      and permitted tolerances
4. Fire resistance requirements
5. Surface finish
6. Dimensions of standard V-grooved pulleys
7. Recommended pulley pitch and outside diameters
8. Service factors for belt drives
9. Power correction factors for arc of contact
10. Power correction factors for belt pitch length
11(a) Power rating for SPZ section wedge belts, with
      180 deg arc of contact on smaller pulley
11(b) Power rating for SPA section wedge belts, with
      180 deg arc of contact on smaller pulley
11(c) Power rating for SPB section wedge belts, with
      180 deg arc of contact on smaller pulley
11(d) Power rating for SPC section wedge belts, with
      180 deg arc of contact on smaller pulley
11(e) Power rating for 'Y' section V-belts, with
      180 deg arc of contact on smaller pulley
11(f) Power rating for 'Z' section V-belts, with
      180 deg arc of contact on smaller pulley
11(g) Power rating for 'A' section V-belts, with
      180 deg arc of contact on smaller pulley
11(h) Power rating for 'B' section V-belts, with
      180 deg arc of contact on smaller pulley
11(j) Power rating for 'C' section V-belts, with
      180 deg arc of contact on smaller pulley
11(k) Power rating for 'D' section V-belts, with
      180 deg arc of contact on smaller pulley
12. Deflection force required for measuring
      installation tension in wedge and V-belt drives
13. Values of K to correct for the effect of
      centrifugal tension
Figures
1. Belt cross sections
2. Measuring pulley
3. Pulleys requiring dynamic balancing
4. Multi-groove pulley cross section
5. Selection of wedge belt cross section
6. Selection of V-belt cross section
7. Belt deflection measurement
8. Apparatus for measuring the electrical resistance
    of belts
9. Arrangement of burner apparatus for flame test
10. Cabinet for flame test

Dimensional and physical properties of endless wedge and V-belt drives for power transmission. Includes information on power ratings, design, selection and installation of drives.