BS 5138:1974

Co-operating organizations
Foreword
Specification
1 Scope
2 References
3 Method of test
4 Assessment of results
5 Inspection and rectification of defects
6 Certificate of test
Appendix
A The effects of dimpling on crankshafts: results of an
   investigation on a known crankshaft
Tables
1 Maximum equivalent median stress (alpha = 30 degrees,
   theta = 0 degrees)
2 Maximum equivalent semi-range alternating stresses
   (alpha = 30 degrees, theta = 0 degrees)
3 Maximum equivalent median stress
4 Maximum equivalent semi-range alternating stresses
Figures
1 Inspection zones: crankshaft in which the pin and
   journal does not overlap
2 Inspection zones: crankshaft with overlap between pin
   and journal
3 Permissible sizes of inclusions
4 Bending stress distribution in the crankpin fillet of
   a typical crankshaft
5 Torsional stress distribution in the crankpin fillet
   of a typical crankshaft
6 Stress concentration factor against r/h in bending
   and torsion, showing minimum permitted values of r/h
   for a crankpin with a 360 degree groove
7 Percentage reduction in load-carrying capacity of a
   crankshaft bearing
8 Non-dimensional load-carrying capacity of a
   crankshaft bearing

Specifies conditions for magnetic particle flaw inspection of solid forged and drop stamped crankshafts with pin or journal finished machined diameter 80 mm and over, excluding built-up shafts and automotive types. Acceptance levels are given.

This standard specifies the conditions for the magnetic particle flaw inspection of solid forged and drop stamped crankshafts with pin or journal finished machined diameter of 80 mm and over, excluding built-up shafts and automotive types. It also specifies levels for acceptance and for local removal of defects.

This British Standard is applicable to any shaft proportioned in accordance with the rules of Lloyd’s Register of Shipping.