Crank shaft

The crankshaft is mainly of the semi built type, made from forged or cast steel throws. At the aft end, the crankshaft is provided with the collar for the thrust bearing, and the flange for the turning wheel and for the coupling bolts to an intermediate shaft.
At the front end, the crankshaft is fitted with the collar for the axial vibration damper and a flange for the fitting of a tuning wheel. The flange can also be used for a Power Take Off, if so desired. Coupling bolts and nuts for joining the crankshaft together with the intermediate shaft are not normally supplied.

Components of crank shaft
  1. Crank shaft bearing or main bearing
  2. Thrust bearing
  3. Counter weight
  4. Flywheel mounting flange
  5. Vibration damper
  6. LO holes
Types of crank shaft
  1. Semi Built-Constructed with parts by parts for one unit and then connected together
  2. Fully Built-Constructed by casting and totally make only one part
  3. Welded-Constructed part by part,then welded together 
Crank shaft inspection
  1. Check abnormal sound
  2. Check oil Spot
  3. Check cracks
  4. Check crankshaft bearing
  5. Check balance shaft bearing
  6. Check the Oil passages
  7. Check any loosen bolts
  8. Connecting rod journal surface
  9. Check alignment of the shaft
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