Crankshaft repair is required in case of following abnormalities observed in the crankshaft

  • Development of taper and ovality in crankpin and main journal of the crankshaft in access of tolerances stipulated by manufacturer

  • Development of bearing line marks, pitting and rough surface

  • Damage of radius profile due to accident or seizure of bearing of crankpin or main journal

  • Development of crack and variation in hardness of the crankpin and main journal of the crankshaft.

  • Loss of alignment of the crankshaft

Crankshaft repair is undertaken by RA power solutions of the crankpin and main journal of the crankshaft diameter ranging from 35mm to 700mm. Crankshaft repair is undertaken by experienced technicians who have been specifically trained in our workshop on a dummy crankshaft, the company has experience of more than four decades in crankshaft repair.

The on-site grinding equipment designed and manufactured by RA power solutions can maintain the close tolerance after crankshaft grinding within 0.02mm and the surface finish which is far superior to the international standards. Crankshaft grinding machine has a main frame manufactured out of titanium steel which makes it lighter and vibration free during operation. The grinding of crankshaft is possible even while sailing of the vessel and there is no requirement of holding the vessel at anchor or a port for crankshaft repair.

All the crankshafts repaired by RA power solutions are guaranteed for a satisfactory performance we have successfully executed more than 10,000 crankshaft repair jobs. The services of crankshaft grinding and crankshaft repair are offered on low cost and our technicians carry CDC of Indian origin, Panama, and Pallav.

Crankshaft repair
Crankshaft repair
On-site crankshaft repair
On-site crankshaft repair
Crankshaft repair machining
Crankshaft repair machining

On-Site Crankshaft Grinding Machine | Crankshaft Polishing Machine

Crankshaft grinding machines are designed to maintain the accurate tolerances as per the engine manufacturer’s recommendation

Generally, it is observed that even for the higher diameter of crankpin and main journal of the crankshaft the tolerances do not exceed more than 0.05mm in order to achieve such close tolerances of crankpin and main journal of crankshaft RA power designs and manufactures on-site crankshaft grinding machine which has the capability to maintain the close tolerance of even 0.01mm/0.02mm which is far better than the close tolerance specified by the engine manufacturers.

The on-site crankshaft grinding machine and crankshaft polishing machine manufactured by RA power solutions has the following features:

    1. Crankshaft grinding machine is designed in a way that it can be inserted from the inspection window of the engine block thus there is no need of removal of the crankshaft from the engine block.

    2. In case of space restrictions, RA power has the capability to design the equipment according to the space available on site for grinding or polishing of crankshaft/turbine/alternator shaft/rotor shaft etc…

    3. The on-site crankshaft grinding machine is lightweight portable and can be easily carried to the site all over the world. The crankshaft grinding  machine is packed in the suitcase and is carried as accompanied baggage accepted by all international airlines

    4. The main body of crankshaft grinding equipment is manufactured out of titanium alloy which is lightweight and can absorb the vibrations this feature of crankshaft grinding machine facilitates RA power technicians to undertake crankshaft repair on board the vessel while it is sailing, maintaining the close tolerances within 20 microns.

    5. Crankshaft grinding machine designed and manufactured by RA power can presently work up to 700mm diameter which we are in process of extending up to 1000mm.

Conclusion

RA power has sold more than 70 crankshafts grinding machines all over the world which are performing satisfactorily the cost of the machine is low and is affordable for repair workshop, shipping company, power plants etc…

 Crankshaft grinding machine for repair and grinding
Crankshaft grinding machine for repair and grinding
Crankpin grinding on board the vessel
Crankpin grinding on board the vessel
Crankshaft Grinding Machine for Small Diameter
Crankshaft Grinding Machine for Small Diameter

 

Onsite Crankshaft Grinding | Crankshaft Repair | Crankshaft Polishing and Grinding

RA Power Solutions undertakes Onsite Repair and Grinding of Crankshaft up to diameter of 700 mm. The experience technicians travel with light weight latest design of Onsite Crankshaft Grinding Machine to execute the Crankshaft Repair. The Onsite Crankshaft Grinding Machine has following benefits to the clients.

Crankshaft Grinding Wartsila 18 V32
Crankshaft Grinding Wartsila 18 V32

The Benefits:

I.) You do not need to remove the Cranks shaft from the engine or press.

II.) We save your time: – some of these repairs can be carried out as little as 24 hours.

Insitu Crankshaft Grinding
Insitu Crankshaft Grinding

III.) We save your money: – The engine does not have to be stripped down and transported or reassembled. The savings on this alone are usually very significant.

IV.) We keep your plant running: – Downtime is minimized so that you can be back into operation and earning money sooner.

V.) Machining and polishing of Crankshaft and Crankpin are carried to OEM tolerances and surface finish specifications.

VI.) We cover standard Crankshaft diameter ranging from 30 mm to 700 mm.

VII.) Our patented orbital equipment rotates around damaged crankpin journal using the radius as a datum.

VIII.) We can also Hone and Polish your crankpin if the damage is slight or you just want to improve the surface finish up to 0.3 micron Ra Value.

For more information, please email us on info@rapowersolutions.com or call us on +91-9582647131

Onsite Crankshaft Grinding
Onsite Crankshaft Grinding
Repir ofCrankshaft MAN B& W
Repir of Crankshaft MAN B& W

Insitu Crankpin Grinding | Crankpin Repair | Marine and Industrial Engine

RA Power Solutions undertake crankpin polish and crankpin grinding of crankshaft for four stroke and two stroke for marine and industrial diesel engines.

We work on medium and high capacity diesel engines having capacity of more than 400 KW. In terms of diameter we can undertake crankpin polish and crankpingrinding onsite for the diameters ranging from 60 mm to 700 mm.

Crankshaft Grinding and Polishing with Highest Precision

The crankpin grinding and crankpin polishing for marine and industrial application is undertaken by onsite crankshaft grinding machine. The diameter, surface finish and all parameters are maintained strictly as per the manufacturer’s specifications. Each job of crankpin polishing and crankpin grinding is executed with the greatest care because inexpertly repair of crankshaft can lead to the premature failure of the bearing causing considerable consequential damage. In fact with four decades of experience in the field of crankshaft grinding and crankshaft repair our experts technicians guarantee machining of crankshaft to the highest professional standards.

Damage Crankpin of Wartsila 12V32
Damage Crankpin of Wartsila 12V32
Insitu Crankshaft Grinding Machine from Crankcase Window
Insitu Crankshaft Grinding Machine from Crankcase Window

 

 

 

 

 

 

 

 

Cost Effective Crankshaft Grinding Services

In spite of constantly executing the repairs as per the OEMs standards with the highest quality demand we as an Indian company are considered to be the lowest price wise in comparison to the companies based in Europe, Singapore and other countries. We have executed successfully repair of over 10,000 crankshafts which is a testimony of confidence on us by clients based all over the world.

Inspection and Grinding of Crankpin of Wartsila Engine is in Process
Inspection and Grinding of Crankpin of Wartsila Engine is in Process

 

Services Related to Repair and Overhauling of Engine

RA Power Solutions offers all the services related to repair and overhauling of medium and high speed engines which includes following:

I)Insitu crankshaft repair, crankshaft grinding and crankshaft polishing up to 700 mm diameter.

II) Engine block repair by metal stitching and metal locking, line boring and other process.

III) Repair of major parts like cylinder heads, connecting rods, cylinder liners, etc.

IV) Repair and overhauling of diesel engines

All the repairs and services offered by RA Power Solutions are supported with guarantee.

We extend services all over the world including Nigeria, Singapore, Indonesia, Germany, Taiwan, Belgium, Korea, Ecuador, Brazil, Mexico, Myanmar, Greece, Spain, Finland, Netherlands, Oman, Dubai, Iran, Egypt, Russia, Philippines etc.

For more information, please email us on info@rapowersolutions.com

Grinding of Crankpin Under Process
Grinding of Crankpin Under Process
Finished Crankpin of Wartsila Engine After Onsite Grinding
Finished Crankpin of Wartsila Engine After Onsite Grinding

Insitu Crankpin Machining

Sulzer model 6RTA Engine was reported damaged in high seas near Mombasa on a transit to Sri Lanka. On investigation, it was observed that the connecting rod bolts got sheared damaging lower and upper engine block and three crankpins of the Crankshaft.

Team of RA Power Solutions technicians having experience of undertaking in-situ crankpin machining and a team undertaking repair of crack and damaged engine block by metal stitching and metal locking process was deputed on board a vessel within a short notice as all of them have a seamen passport.

Repair of Engine Block by Metal Stitching Process
Repair of Engine Block by Metal Stitching Process

On preliminary examination multiple cracks on upper and lower crack case of engine block were observed measuring in totality 2900 mm in terms of length. Three crankpins were damaged developing taper and ovality exceeding more than 1 mm. RA Power Solutions team of technicians worked non-stop and executed the repair of crankpins by onsite crankshaft grinding machine. All pins were undersized to 1.5 mm due to the damage.

Grinding of Crankpin on Board a Vessel
Grinding of Crankpin on Board a Vessel
Crankpin After Grinding by Crankshaft Grinding Machine
Crankpin After Grinding by Crankshaft Grinding Machine

 

 

 

 

 

 

 

The engine block cracks were repaired by metal locking and metal stitching process. The complete job was executed within 68 hours. The hard work, knowledge, experience, sincerity of technicians have been very much appreciated by the owners. This achievement was possible due to RA Power Solutions having latest design of equipment, experienced technicians having Indian CDC.

For more information, please email us on info@rapowersolutions.com

Insitu Grinding of Crankshaft

Insitu grinding of crankshaft and polishing is offered by RA Power Solutions Pvt. Ltd. for last more than 3 decades. Our experienced technicians reach at site in minimum possible time with Insitu crankshaft grinding machine and undertake crankshaft repair without removing of crankshaft from the main engine.

Insitu Crankshaft Grinding in Process
Insitu Crankshaft Grinding in Process
Crankshaft Grinding
Crankshaft Grinding

 

 

 

 

 

 

 

The Insitu crankshaft grinding is undertaken by light weight portable Insitu crankshaft grinding machine which is operated pneumatically. The equipment is of latest design and is capable to maintain the close tolerance within 20 to 30  microns in terms of  taper and ovality. Onsite crankshaft grinding can also be undertaken while the vessel is sailing. This is possible due to continuous research and development done by our engineers to minimize the vibrations while the vessel is sailing.Our technicians hold valid seamen book and can sail if required.

 

Upper View of Crankshaft Grinding Machine
Upper View of Crankshaft Grinding Machine

The time required for repair that involves crank pin grinding and polishing of crankshaft is minimum due to the latest design of our crankshaft grinding equipment executed by experienced technicians.

We can undertake grinding and polishing of crankshaft up to 700 mm diameter and have executed more than 10,000 repairs in our 36 years of experience world wide.

Onsite Crankshaft Grinding Machine Ready for Dispatch
Onsite Crankshaft Grinding Machine Ready for Dispatch

 

Pneumatic Motor Mounted on Machine
Pneumatic Motor Mounted on Machine

 

 

 

 

Author of this blog is Raj Shahani, Managing Director of RA Power Solutions Pvt. Ltd. He has been working on crankshafts for last more than 36 years. The author had his training with leading crankshaft manufacturers like CKD Skoda in Pilsener Czech Republic , Sidenor in Spain, National Forge in Germany, etc.