Month: October 2018

Crankshaft Reconditioning | Crankshaft Machining | Crankshaft Repair | Crankshaft Grinding – RA Power Solutions

RA Power Solutions is having more than forty years of experience in crankshaft reconditioning of large marine engines and engines installed in Power plants.

Diesel Engine Ready for Grinding & Repair
Diesel Engine Ready for Grinding & Repair

 

The onsite crankshaft repair and grinding is undertaken by RA Power Solutions experienced technicians for diameter ranging from 30 mm to 700 mm, which cover almost all the crankshafts used for different applications. It is generally observed that due to non-experience or lack of knowledge of the companies undertaking crankshaft reconditioning of Crankshaft misguide the end users resulting to serious breakdown and considerable higher expense.

Onsite Grinding of Crankpin by RA Power Solutions
Onsite Grinding of Crankpin by RA Power Solutions

RA Power Solutions has undertaken reconditioning of crankshaft exceeding ten thousand numbers and recommends the following situation for reconditioning of the crankshaft.

Recommendation for reconditioning of Crankshaft:

I) It is recommended to undertake crankshaft repair in case taper and ovality exceeds the limit specified in maintenance manual of engine manufacturer.
II)  In case due to accident, deep line marks or depression is developed.
III) Reconditioning of crankshaft is recommended in case higher hardness is observed due to seizer of bearings or any other reason.
IV) Development of surface crack
V) Loss of alignment.
VI) In certain cases, although the dimensions of CR Pin and Main Journal are observed within the limit, but due to rough surface observed on CR Pin and of Main Journal, surface require polishing.

Crankpin Before Grinding
Crankpin Before Grinding

Above suggestions are given for reconditioning of crankshaft. It is always advisable to send photographs and brief Inspection report to RA Power Solutions for free recommendation as how to repair Crankshaft successfully.

Contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383 for more information.

Grinding of Crankpin by Onsite Crankshaft Grinding Machine
Grinding of Crankpin by Onsite Crankshaft Grinding Machine
Crankpin After Onsite Grinding & Repair
Crankpin After Onsite Grinding & Repair

Onsite Crankshaft Repair | Crankshaft Grinding | Crankshaft Reconditioning – RA Power Solutions

Onsite Crankshaft Repair, Crankshaft Grinding, and Crankshaft Reconditioning is undertaken by RA Power Solutions for the last four decades. The company has technicians who are trained to undertake onsite crankshaft repairs strictly as per manufacturer’s specifications stipulated in the manual.

All technicians have valid CDC and can travel in a short notice anywhere in the world to board the vessel. The onsite crankshaft repair and onsite crankshaft grinding equipment used by RA Power Solutions has a main structure manufactured out of Titanium steel which results to absorption of Vibration while the onsite crankshaft grinding machine is in operation in high seas with turbulence. The quality after the reconditioning and repair of crankshaft is of Great Importance and is maintained. Following checks are undertaken.

Repair of MAN Engine is in Process
Repair of MAN Engine is in Process

Quality of a Re-Machined Pin or Journal

The quality of a pin or journal after machining has to meet following requirements:

  • Geometrical tolerance in accordance with manufacturer specifications.
  • A blueing check has to be carried out on the re-machining surface. Blueing Shells: Min. Width equivalent to Journal or Crank-pin dimensions respectively. Min. Length is equivalent to 1/5 of the Journal or crank-pin circumference.
  • Required contact area: Min. 35% equally distributed over width and circumferences.
  • Free of hairline cracks: Journal or crank pin to be tested by mean of Magnetic Particle crack detection method.
  • Free of Martensite: The microstructure is to be tested for edged areas of martensite structure will replicas or micro etching with 5% nitric acid in alcohol (Nital) applied to the pin after polishing.
  • The maximum admissible hardness of remaining local hardsports: However such local hardsports are not tolerated around the fillets and the bores for lubrication.
Onsite Grinding & Repair of Crankpin is in Process
Onsite Grinding & Repair of Crankpin is in Process
Onsite Repair & Grinding of Crankshaft
Onsite Repair & Grinding of Crankshaft

For more information about onsite crankshaft repair and grinding, crankshaft grinding, onsite crankpin grinding, etc. please contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.