API 1B : 1995

1 Scope
1.1 Coverage
2 V-belts
2.1 Quality
2.2 Workmanship
2.3 Surface
2.4 Static conductivity
2.5 Cross section
2.6 Lengths
2.7 Length determination
2.8 Matched belts
2.9 Nomenclature
2.10 Details for dimensional checking of belts
3 Marking
3.1 Other name
3.2 Method
3.3 Marking
3.4
Appendix A - Sheaves for V-belts
Appendix B - Design procedure for power application of
             V-belts
Appendix C - Recommended practice for care and use of
             V-belts
Appendix D - Recommended practice for measuring tension
             in V-belt drives
Appendix E - Recommended practice for calculation of
             load imposed by a V-belt drive on shafts
             and bearings
Appendix F - Marking requirements for API monogram
             licensees
Appendix G
Figures
1 V-belt cross sections
2 Diagram of a vixture for measuring V-belts
3 Method for measuring sheaves
4 Measuring belt ride
A-1 Classical groove cross section - current practice
A-2 Standard classical groove cross-section,
      recommended practice - standard narrow groove
      cross-section
A-3 Deep classical groove cross-section, recommended
      practice - deep narrow groove cross-section
A-4 Keyway dimensions
A-5
A-6
A-7
B-1 Guide for selecting classical V-belt cross section
B-2 Guide for selecting classical V-belt cross section
B-3 Guide for selecting narrow V-belt cross section
B-4 Guide for selecting narrow V-belt cross section
C-1 Typical usage of idlers for tensioning or reducing
      plan vibration
D-1 Belt deflection measurement
Tables
1 Nominal dimension of cross sections, inches
2 Nominal dimension of cross sections, millimeters
3 Classical V-belts standard datum lengths - inches
4 Classical V-belts standard effective lengths -
      millimeters
5 Narrow V-belts standard effective lengths - inches
6 Narrow V-belts standard effective lengths -
      millimeters
7 Complete measuring conditions using diameter over
      ball sheave inspection for classical belts, inches
8 Complete measuring conditions using diameter over
      ball sheave inspection for classical belts,
      millimeters
9 Complete measuring conditions using diameter over
      ball sheave inspection for classical narrow belts,
      inches
10 Complete measuring conditions using diameter over
      ball sheave inspection for classical narrow belts,
      millimeters
A-1 Groove dimensions for classical V-belt sheaves
A-2 Groove dimensions for narrow V-belt sheaves
A-3 Groove dimensions for classical V-belt sheaves
A-4 Groove dimensions for narrow V-belt sheaves
A-5 Keyway dimensions
A-6 Keyway dimensions
A-7 Keyway dimensions
A-8 Tapered keyway dimensions metric
B-1 Service factors
B-2 Arc-of-contact correction factor
B-3 Length correction factors (inches)
B-4 Length correction factors (metric)
B-5 Classical V-belt center distance allowance for
      installation and take-up inches
B-6 Classical V-belt center distance allowance for
      installation and take-up millimeters
B-7 Narrow V-belt center distance allowance for
      installation and take-up inches
B-8 Narrow V-belt center distance allowance for
      installation and take-up millimeters
B-9 Power rating (horsepower)
B-10 Power rating (kilowatts)
B-11 Speed ratio constants (all belts)
C-1 Minimum recommended outside idlers
D-1 Factors KM and KY for use in tensioning formulas
      (inch-pound units)
D-2 Factors KM and KY for use in tensioning formulas
      (metric SI)
G-1 Narrow V-belt sheave sizes generally available
G-2 Narrow V-belt sheave sizes generally available

Gives dimensional and marking requirements on V-belts and V-belt sheaves of both the narrow multiple and classical multiple type. Includes recommended practices for power application of V-belts, care and use of V-belts, measuring tension in V-belt drives and calculating the load imposed by V-belts on shafts and bearings.