RA Power Solutions is known as a leader in Offering Onsite Repair of Crankshaft world wide with forty years of experience in this field, the company’s endeavor is always to save the Crankshaft from the rejection.
The crankshaft which meet with serious accident and are even rejected by the European Repair Companies are attended by Ra Power Solutions and are successfully repaired. This is possible because of having the technicians who have hand on experience of repairing more than ten thousand Crankshafts.
All Crankshafts are initially checked and Inspected to ensure that they are acceptable for reuse or for repair. The Onsite Crankshaft Grinding and Crankshaft Polishing is undertaken through the window of the engine block. Due to continuous Innovation in design and technology of Crankshaft Grinding Machines manufactured and used by us, it is possible to maintain the dimensional tolerances strictly as per the Original Equipment manufacturer. The Crankshaft Grinding and Polishing is done in minimum possible time. Thus reducing the breakdown time of the equipment considerably.
Presently we are undertaking Crank-pin and Main Journal grinding and repair up to 700 mm and are in process of increasing the capacity up to 1000 mm.
We undertake Onsite Crankshaft Grinding of all popular makes of engine and their model. Few of them are as following-
Wartsila 6R32, 12V32, 18v32. Mirrlees Black Stone ESL, MAJOR K series Generators, Ruston, Allen, Yanmar, MAN B& W, Daihatsu engine etc.
For more details, please email us on email@example.com or call us on +91-9582647131
RA Power Solutions is having more than forty years of experience in reconditioning of Crankshaft of large marine engines and engines installed in Power plants.
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 reconditioning of Crankshaft misguide the end users resulting to serious breakdown and considerable higher expense.
RA Power Solutions has undertaken reconditioning of Crankshaft exceeding ten thousand numbers and recommends 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.
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.
For more information, please email us on firstname.lastname@example.org or call us on +91-9582647131
Onsite Crankshaft Repair | Crankshaft Grinding | Crankshaft Reconditioning is undertaken by RA Power Solutions Pvt Ltd for last four decades. The company has technicians who are trained to undertake Onsite Crankshaft Repairs strictly as per manufacturers 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 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.
Quality of a Re-Machined Pin or Journal
The quality of a pin or journal after machining has to meet following requirements:
I) Geometrical tolerance in accordance with manufacturer specifications.
II) 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 equivalent to 1/5 of Journal or crank-pin circumference.
III) Required contact area: Min. 35% equally distributed over width and circumferences.
IV) Free of hairline cracks: Journal or crank pin to be tested by mean of Magnetic Particle crack detection method.
V) 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.
VI) Maximum admissible hardness of remaining local hardspots : However such local hardspots are not tolerated around the fillets and the bores for lubrication.
Engine population is rapidly increasing for shipping industry, power plants and various applications. In most of the cases engines are used not only for the emergency purpose but as a base load. The continuous running of diesel engine results to wear and tear of crankpin and main journal of the crankshaft. In certain cases taper and ovality more than the permissible limit is developed in the crankpin and the crankshaft main journal.
The disassembly of the crankshaft from the main engine and to send it to the designated workshop is a lengthy process. This is now outdated. RA Power Solutions having the experience of more than four decades in repair of crankshaft have developed a portable, light weight onsite crankshaft grinding machine which can be taken to the site as an accompanying baggage. The onsite crankshaft grinding machine has following features:
I) Light in weight, can be carried to the site easily.
With the experience of more than four decades, RA Power Solutions has been the leader in providing insitu crankpin, main journal grinding and machining. The removal of crankshaft from the engine block incase of accident or normal wear and tear is not required. The removal of crankshaft from the engine block is a lengthy process and expensive and engine manufacturers are to be contacted for the disassembly and removal of the Crankshaft from engine.
The onsite crankshaft grinding machine is placed on the damage crankpin through the inspection window provided in the crankcase. Due to the compact design of the machine, most of the crankshafts can be repaired onsite.
RA Power Solutions undertakes onsite grinding of crankshaft and polishing of diameter ranging from 60 mm to 700 mm.
The jobs of crankpin and main journal repair of crankshaft executed by us have following features:
I) Having latest quality control measuring instruments to check hardness, crack by MPI, taper, ovality , surface finish, etc.
II) All instruments used for measuring the crankpin and main journal diameter are periodically sent to the laboratory for calibration. Valid certificate are kept in record as per the requirement of inspection agencies.
III) Latest design and technology instruments/Equipments are used prior to repair of the crankshaft and after the repair are executed.
Advantage of RA Power Solutions for Crankshaft and Main Journal Repair
I) Crankshafts are repaired onsite up to the diameter of 700 mm. No need of removal of crankshaft.
II) Experienced team of technicians is always ready to leave for sailing all over the world.
The holding of seamen passport by technicians’ facilitates them to fly out to any country in short notice.
III) The robust design, use of titanium for manufacturing the body of crankshaft grinding machine ensures minimum or no vibration while crankshaft grinding machine is in operation. The job of repair of crankshaft can be executed while the vessel is sailing.
All the services required for repair of engine and to put it back to the operation are extended by RA Power Solutions including commissioning and trial part.
IV) The experience of repairing over 10,000 crankshaft makes us leader in this field. Cost of repair of crankshaft and the services offered are the lowest in industry. This is possible due to continuous upgrading of technology and process followed by us.
Crankpin grinding, crankpin repair by insitu crankshaft grinding machine is offered by RA Power Solutions through highly motivated team of technicians who have the experience of four decades in crankshaft grinding and crankshaft repair. It is important that the crankshaft is initially inspected by the experienced technicians in order to detect the fault after the damage or accident.
Following are the major parameters which are examined before the repair of crankshaft:
I) Minimum and maximum diameter of the crankpin and main journal, taper and ovality is checked.
II) Run out of main journals and deflection readings are taken to verify the loss of alignment.
III) Complete non-destructive test using MPI and ultraviolet lamp for heat cracks is undertaken of crankpins and the main journal of the crankshaft.
IV) Crankshaft is also subject to hardness test.
Based on the preliminary inspection reports prepared by the technicians the repair procedure is planned. The onsite crankshaft grinding machine used for the crankshaft repair is light weight and is placed on the damaged crank pin from the inspection window of the engine block.There is no requirement of removing the crankshaft from the Entablature and send it to the workshop as bench type grinders are now out dated.
The crankshaft grinding and crankshaft polishing is undertaken maintaining taper and ovality, surface finish as per the OEMs requirement. RA Power Solutions have facilities to undertake insitu crankshaft grinding, crankshaft polishing and crankshaft repair up to the diameter of 700 mm without removing the crankshaft from the engine block.
During and after the repairs all the major technical parameters are checked and calibration report is prepared.
It is possible to execute the crankshaft grinding and crankshaft repair on board a vessel while it is sailing. Technicians have seaman passport and can travel to any part of the world in a shortest possible time thus attending to the damaged engine in short time. We are class approved and stand guarantee for the satisfactory performance of crankshaft after repairs.