Crankshaft Polishing Made Easy

Few years back no one believed that the crankshafts, crankpin and main journal can be polished onsite by the end user. Always the impression was given by few companies based in Europe and Singapore that crankshaft polishing needs special heavy equipments and technicians with years of experience to undertake the polishing of crankshaft, crankpin, and main journal.

Crankpin Machining is Required in Case of Following Damage to the Crankpin.

Development of excessive taper & ovality on a crankpin.
Seizure of crankpin bearing
Development of bearing marks and pitting on crankpin.
  • Development of excessive taper & ovality on a Crankpin diameter.
  • Seizure of crankpin bearing.
  • Development of bearing marks and pitting on crankpin.
Due to above defects it is necessary to get the Crankpin Machining undertaken.

RA Power Solutions Pvt. Ltd. easy to operate and do it yourself crankshaft polishing machine manufacturers up to 700 mm diameter.

Reason for periodical polishing of crankpin and main journal:-

  • The engines of leading manufacturers like Wartsila, Daihatsu, Mirrless Blackstone, Yanmar, Allen, MAK, MAN, B&W, Sulzer, Caterpillar are designed to have close tolerances in the crank pin and main journal.
  • Generally, the tolerance ranges between 0.02 mm to 0.05 mm.
  • Periodical polishing of crankpin and main journal diameter is highly recommended to remove the linemarks, pitting from the journals.
  • Crankshaft polishing improves the surface finish and enhances the life of bearing manifolds.
  • The chance of crankshaft meeting with any serious accidents or bearing seizure incidents are reduced considerably.
  • The high surface finish of crankpin and main journal after polishing can produce more power, durable and long-lasting performance of Engine.
  • The crankshaft polishing results in less noise, vibrations, friction and consumes less fuel.
  • Lower emissions are produced.

Due to above and many reasons, it is highly recommended to undertake polishing of crankpin and main journal periodically at the time of major overhauling or replacement of bearings.

RA Power Solutions Pvt. Ltd. manufactures for last fifteen years, revolutionary equipment for onsite polishing of crankpins without removing the crankshaft from the engine block. The crankshaft polishing machine is manufactured in the range starting from 35 mm to 700 mm in terms of diameter.

It has following features:-

  • Crankshaft polishing machine is inserted from the engine block inspection window and sits on the crankpin diameter.
  • There is absolutely no requirement of removal of the crankshaft from the block.
  • The machine is supplied in two versions:- electrical and pneumatic depending on the availability of the facilities on board the vessel or any industry.
  • Machine is easy to operate, can reduce the taper and ovality, and improve the surface finish far better than the international standards.
  • The crankshaft polishing machine is easy to operate and can be used by any technician to do polishing.

Stop spending high amounts on polishing of crankshaft by calling the specialized companies, reduce the cost of maintenance by increasing the life of bearings and crankshafts.

This blog is written by Mr. Raj Shahani(Managing Director of RA Power Solutions). He has more than forty years of experience in the field of engine repair  and is a technical adviser to various shipping and heavy industries based all over the world.

For more information on crankshaft polishing machine manufacturers, polishing crank journals, crankshaft grinding and polishing, or cylindrical shaft grinding machine contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131.

Development of excessive taper ovality on a crankpin.Seizure of crankpin bearing Development of bearing marks and pitting on crankpin.