Repair & dynamic balancing of engine crankshaft

A crankshaft is a shaft driven by a crank mechanism, consisting of a series of cranks and crankpins to which the connecting rods of an engine is attached. It is a mechanical part able to perform a conversion between reciprocating motion and rotational motion. In a reciprocating engine, it translates reciprocating motion of the piston into rotational motion.
Dynamic balancing as per IS1940/1 at Grade G1

Diameter : 350 mm

Weight : 3000 kg

Length : 1950 mm

Speed : 500 RPM
Scope Of Work
Repairing of engine crankshaft in process
Set-up of job on dynamic balancing machine
Polishing of crankshaft with 400 grit sandpaper
Fine finishing with polishing paper
Runout check for main journal & crank pin
Ultrasonic test being carried out
Surface roughness is measured
Hardness testing is carried out
Job ready for dispatch
Process followed is briefed below:

Step:1
Repairing of engine crankshaft in process

Step:2
Set-up of job on dynamic balancing machine

Step:3
Polishing of crankshaft with 400 grit sandpaper

Step:4
Fine finishing with polishing paper

Step:5
Runout check for main journal & crank pin

Runout check report

Runout measurement readings

Step:6
Ultrasonic test being carried out

Step:7
Surface roughness is measured

Surface roughness report

Step:8
Hardness testing is carried out

Initial Reading

Final Reading

Step:9
Job ready for dispatch
Case Study
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