Crankshaft Grinding and Repair

Product Details:

RA Power Solutions Pvt. Ltd. has the most modern crankshaft grinding equipment in the world which can undertake crankshaft repair, crankshaft onsite machining. It is advisable to always contact a company which has experience of crankshaft onsite machining to ensure that the crankshaft and the engine perform satisfactory after the repair is executed. The repair of crankshaft specially the crankshafts which meet with accidents need experienced hand to repair.

 Instead of trusting the local companies and the companies with inadequate experience, contact RA Power Solutions for all your requirement of crankshaft repair services, Crankshaft onsite machining.

Our consultancy division can give you the suggestion to save the crankshaft from rejection.

Product Details:

Removal of crankshaft from the engine block for repairs is outdated. With the introduction of the latest onsite crankshaft grinding equipment and technology, it is now possible to undertake crankshaft repair insitu  without removing it from the engine block.

RA Power Solutions Pvt. Ltd. have the necessary equipments and tooling's to undertake insitu repair of crankshaft diameter ranging from 35 mm to 700 mm. The taper and ovality after crankshaft repair is maintained strictly as per the manufacturer manual.

We extend crankshaft grinding services all over the world including countries like Madagascar, Oman, Qatar, Philippines, Bahrain, Srilanka, Bangladesh, Myanmar, Turkey, Nigeria, Greece, Saudi Arabia, UK, Dubai, Malta, Cyprus.

Product Details:

RA Power Solutions has the equipment ready to undertake crankshaft repair upto 700 mm diameter. Our technicians are trained in our training school and have experience ranging from 20 to 40 years in successful in situ repair of crankshaft. We have successfully repaired crankshafts of engines Wartsila, MAN B&W, MAK, SKL, Caterpillar, Ruston, DEUTZ, Alpha B & W, Bergen, Sulzer, MTU, nohab polar, Pielstick, Hatlapa, Mitsubishi, stork werkspoor, MVM, Yanmar etc

For your requirement of crankshaft repair and for crankshaft grinding machine, please contact RA Power Solutions

Product Details:

Leaders in crankshaft grinding up to 700 mm. This is the description of RA Power Solutions with  more than four decades of experience in repair of crankshaft, compressor shaft, pump shaft and all types of cylindrical shafts maintaining close tolerances better than specified by the manufacturer.

REDUCE DOWNTIME TO MINIMUM SAVE COST OF PLANT MAINTENANCE :-

·         In case of failure of the crankshaft, we depute our experienced technicians along with the portable crankshaft grinding equipment anywhere in the world for repairs. We are geared up to depute our technicians with insitu crankshaft grinding equipment in a short notice to reduce the downtime to minimum.

·         The insitu crankpin and main journal rectification services and remedial repairs are extended without dismantling of the shaft from the crankcase or body of the Engine / equipment.

·         The key to our success of crankshaft repair services offered  is our latest modern revolutionary designed and advanced technological equipment which is light in weight and can be carried as an accompanied baggage in aircraft all over the world.

 

REPAIR OF  DAIHATSU 6DLB-19 CRANKSHAFT UNDERTAKEN ON BOARD A VESSEL WHILE SAILING AT MUNDRA PORT, GUJARAT, INDIA:-

THE DETAILS OF ENGINE ARE GIVEN BELOW:-

 

 

 

·         Our technicians also inspected the connecting rod big end bore for its dimensions and polished it.

·         We are ISO 9001:2015 certified company and all the services of compressor shaft, pump shaft, crankshaft repair are executed with guarantee.

·         In this case, we also supplied under size bearing of 1 mm to our client.

·         The engine is performing satisfactory.

 

Product Details:

RA Power Solutions was engaged by Miami US based reputed shipping company to inspect and repair the crankshaft of Wartsila 12V32 main engine. The vessel due to the failure of a crankshaft of Wartsila 12V32 was at outer Anchorage.
RA Power Solutions's two technicians boarded the vessel in a short time of 36 hrs as they have valid US VISA and Indian CDC. The crankshaft was inspected for all the major parameters like dimension, taper & ovality, hardness, cracks detection, deflection and surface finish test, etc.

RA Power Solutions Pvt. Ltd. manufactures for last fifteen years, revolutionary equipment for onsite polishing of crankpins without removing the crankshaft from the engine. The crankshaft polishing machine is manufactured.
We work on all makes & models of diesel engine crankshafts and also for the crankshafts of compressor and reciprocating equipment.

Product Details:

We Have Been Working On Ckd Skoda Diesel Generating Set And Offer Onsite Repair Of Crankshaft, Engine Block, Cylinder Heads Etc.  We Have In Stock Complete Range Of Spare Parts For 860, 1450, 2270 Kva Ckd Skoda Diesel Generating Sets.

Product Details:

RA Power Solutions undertakes crankshaft repair of damaged crankshaft counter weight and bolts thread. The combination of metal stitching, metal locking and use of helicoil thread inserts is done for successful repair of crankshaft. The loss of alignment of crankshaft by penning process is undertaken.

We extend crankshaft repair services all over the world including countries like Brazil, Egypt, Panama, Russia, Argentina, Ecuador, Czech Republic, Senegal, Fiji, France, Germany, Dubai, Kenya, Chile, Mexico.

Product Details:

We received a call from one of the world’s leading shipping company based in Italy advising regarding failure of the crankshaft of Yanmar M200AL-DT. The vessel was on the way to Lome port in Lome, Togo, West Africa.

THE DETAILS OF CRANKSHAFT ARE AS FOLLOWING:-

 

REPAIR OF CRANKSHAFT OF YANMAR  M200AL-DT IN COVID-19 TIMES:-

RA Power Solutions technicians were able to fly to Togo in a short notice as all our technicians have valid CDC. Our on site crankshaft grinding machine is compact and light-weight and was carried as an accompanied baggage by the technicians. Hence, no time was wasted in booking the machine in cargo, custom clearance etc.

In this difficult time of covid-19, when the air fare and extra weight charges are exorbitantly high with weight restrictions imposed by Airlines our clients save money towards the air freight of the  due to the latest design of our equipment and light weight.

We have the expertise of working on crank pins and main journals having small diameter and bearing length.

In the case of Yanmar M200AL-DT, the crank pin standard diameter is only 152 mm and bearing length is only 61 mm. Most of the companies in the world do not have the necessary equipment to undertake the repair of damage crank pins and main journal having small bearing width and recommend to remove the crankshaft for repairs in the workshop.

We have been regularly executing the repair of crankshafts and Diesel Engines all over the world including   Russia, Germany, United Kingdom, France, Italy, Spain, Ukraine, Poland, Romania, Netherlands, Belgium, Czech Republic , Greece, Portugal, Sweden, Hungary, Belarus, Austria, Serbia, Bulgaria, Denmark, Finland, Norway, Ireland, Slovenia, Estonia, Malta etc.

Product Details:

Do not reject the crankshaft without consulting RA Power Solutions, a company having forty years of experience in successful repair of damaged crankshaft.

We have the record of successfull repair of damaged, rejected and accidental crankshafts all over the world upto 700 mm diameter. We have successfully repaired crankshafts of engines Wartsila, MAN B&W, MAK, SKL, Caterpillar, Ruston, DEUTZ, Alpha B & W, Bergen, Sulzer, MTU, nohab polar, Pielstick, Hatlapa, Mitsubishi, stork werkspoor, MVM, Yanmar etc

Product Details:

We undertake rebuilding of crankshaft, cylindrical shafts etc. which are ideal for correcting manufacturing errors, to repair an obsolete part or excessively worn out part. We pay utmost attention to details like cleaning, surface preparation, spraying and finishing. Our crankshaft rebuilding services ensure that replacement cost is reduced and savings of 50% - 90% is there.

 

On site Rebuilding of Crankcase is offered by us.

 

In case of seizure of bearing Main Journal Housing of Lower crankcase develops excessive taper, Ovality and becomes oversize. We Offer following Services:

 

• On site Rebuilding of Main Journal Housing by Metal Spray and On site line boring of Main Journal Housing to maintain the Alignment.

• On site Fitment of Sleeve and On site line boring of sleeve to maintain the housing bore and alignment 

 

 

 

Product Details:

We were approached by a company based in Malaysia for the problem faced by them in crankshaft of Yanmar 6M220L-SN.

THE DETAILS OF ENGINE AND CRANKSHAFT ARE AS FOLLOWING:-

 

The crank pins having a diameter of 170 mm and bearing width of only 66 mm was repaired by us successfully as all of them developed ovality ranging from 0.07 to 0.11

We have the on site crankshaft grinding machine designed specially to work on the crank pin and main journals having small diameter and bearing width.

We have been regularly executing the repairs in  Greece, Moldova, Belarus, Australia, Austria, Belgium, Brazil, Singapore, Dubai, Cambodia, Colombia, Denmark, Ethiopia, Ghana, Nigeria etc.

For more information, contact us today.

Product Details:

RA Power Solutions was approached by a company based in Greece regarding a problem faced by them in their auxiliary engine of Daihatsu 6 DK-20.

It was reported that the bearing of crankpin no.3 got damaged.

 

It was possible for RA Power Solutions to successfully undertake repair of the crank pin having  bearing width of only 78 mm because we have the equipment which can be placed on the crankpin or main journal diameter having bearing width of as small as 40 mm.

This advance technology and process, no other crankshaft repair company has due to which they either reject the crankshaft or recommend to get it repaired from the workshop. Contact us for more information.

We have been regularly executing the repairs in Greece, Moldova, Belarus, Australia, Austria, Belgium, Brazil, Singapore, Dubai, Cambodia, Colombia, Denmark, Ethiopia, Ghana, Nigeria etc.

Product Details:

We were approached by a company based in Greece reporting the failure of a crankshaft of auxiliary engine on one of their vessels operating in Gulf.

 

DETAILS OF YANMAR 6N18AL-DV ARE AS FOLLOWING:-

Our team of two technicians boarded the vessel in a short notice and requested the chief engineer to open the connecting rod of all the six crankpins.

REPAIRS UNDERTAKEN BY RA POWER SOLUTIONS:-

·         Considering the ovality , multiple cracks on crank pin nos 4 and rough surface observed of YANMAR 6N18AL-DV.

·         All the six crankpins except crankpin no. 4 were undersized to 0.80 mm. The crank pin no. 4 has to be undersized by 1.20 mm due to the presence of cracks.

 

THE MAIN FEATURES OF REPAIR OF CRANKSHAFT OF YANMAR 6N18AL-DV:-

The crankpin having a diameter of 145 mm and bearing length of only 65 mm was successfully repaired by us because of the fact, we have a dedicated crankshaft grinding machine which can undertake the grinding of crank pin having small diameter and bearing width.

Most of the companies based in Europe and other countries do not have the equipment which can on site grind the crank pin and main journal diameter having small diameter and bearing width. They advise clients to open the crankshaft from engine and send it to the workshop for repairs.

We extend our services all over the world at a very low price.

We work on all popular makes and models of engine like Wartsila , Daihatsu , MWM , Caterpillar , MAN , MAK , B&W , Sulzer , Bergen , Detroit Diesel ,Stork Werkspoor , Pielstick , Deutz , Yanmar , MTU , Cummins , Nohab Polar , Caterpillar , Mitsubishi , Yanmar , MAK and many more.

We have been regularly executing the repairs in Armenia, Azerbaijan, Bahrain, Bangladesh, Bhutan, Brunei, Cambodia, China, Cyprus, Georgia, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan etc.

 

YOUR COMPLETE COMPRESSOR CRANKSHAFT REPAIR SOLUTION.

Are you facing any problem with the crankshaft of your compressor? RA Power Solutions has made the repair of compressor crankshaft easy.

By the introduction of new, revolutionary technology, the compressor crankshaft can be inspected on site and repaired if required.

FOLLOWING ARE THE COMMON PROBLEMS OBSERVED IN COMPRESSOR CRANKSHAFTS:-

·         Excessive wear and tear of crank pin and main journal.

·         Increase of  oil gap between the crank pin, main journal and bearing.

·         Frequent damage of crank pin and main journal bearings due to development  of  excessive taper and ovality.

·         Seizure of crank pin and main journal bearings on compressor crankshaft due to non-replacement of bearings within the specified time schedule.

·         Development of rough surface of crankpin and main journal due to bad quality of lubricating oil, Lubricating oil  filters.

·         Damage of both sides of radius fillet due to an accident.

·         Damage of crank pin  of compressor crankshaft due to excessive ovality in connecting rod big end bore.

With the introduction of latest technology, there is no requirement of dismantling of the crankshaft from  compressor casing.

Our technicians visit the site and undertake onsite compressor crankshaft inspection. We have on site compressor crankshaft polishing and grinding equipment available which is carried by our technicians and repairs are undertaken in no time.

SAVE YOUR COMPRESSOR CRANKSHAFT AND INCREASE THE LIFE:-

We strongly suggest for medium and high capacity compressors that their crankshafts should be periodically calibrated for taper and ovality, rough surface, hardness and crack detection.

It is always advisable to get the crankshaft compressor inspected so that the corrective action can be taken on time.

The loss of crankshaft brings the whole plant to the stand-still and now can be avoided by availing the expert services of RA Power Solutions, we regularly undertake inspection and repair of compressor crankshaft of Ariel, Cummins, Kirloskar, Samson, Porter-Cable, Stanley Bostitch, Campbell Hausfeld, DeWalt, Makita, Senco, ANEST IWATA, Gardner Denver, Graham Sulzer, Hitachi, Rolair Systems, Brehob, Lufkin, Zebra , Ingersoll Rand  etc.

Product Details:

We specialise in grinding and polishing of crankshaft journal insitu and onsite up to 700 mm in terms of diameter. We have experience of more than forty years in executing successfully repair of crankshaft journals onsite without removing the crankshaft from the engine block.

The crankshaft journal repair services are offered all over the world in a short notice and it is possible because all our technicians & supervisors hold valid Indian CDC.  

Successful Repair of Crankshaft with damaged Radius fillet due to accident.

It is observed that the leading companies in the world are not able to undertake the grinding of journals in case the radius fillet of the crank pin or main journal of the crankshaft is damaged. Their grinding tool is mounted on the radius fillet and all the references for grinding and polishing are taken from the fillet radius. 

In case of damage to the radius fillet it is not possible for them to use their outdated grinding equipment. They always insist for first repair of the radius fillet charging exorbitant and unreasonable amounts. This not only costs  very high  to the client but also holds the vessel. 

Use Of Latest Designed Onsite Crankshaft Journal Grinding Machine By RA Power Solutions:

Having experience of more than forty years in extending the crankshaft grinding services, we have developed on site crankshaft journal grinding equipment which is of the latest design and technology.The machine works on a bench type crankshaft grinding concept and moves on its own axes. No reference of radius fillet is taken. 

The main equipment body is manufactured out of Titanium alloy and has the inherent property of absorbing the vibrations.Our equipment is designed to work even while sailing and rough weather. There is no requirement of holding the vessel.

Original And Experienced On Site Crankshaft Journal Repair Company

RA Power Solutions is the original company which developed the compact & light weight onsite crankshaft grinding equipment.We have sold more then 70 Crankshaft grinding and polishing equipment all over the world, training on job our clients technicians. 

The use of our advanced onsite crankshaft grinding machine, the down time of the engine is reduced considerably. In certain cases depending on the diameter of the crankpin & main journal we can put back the engine in operation after crankshaft repair within 12 hrs.  

The equipment is so compact that even in limited space or the crank pin having  small bearing width it can be accommodated and grinding can be undertaken. 

We have been regularly executing the repairs in Madagascar, Oman, Qatar, Philippines, Bahrain, Srilanka, Bangladesh, Myanmar, Turkey, Nigeria, Greece, Saudi Arabia, UK, Dubai, Malta, Cyprus, Singapore, Malaysia, Colombia, Indonesia, Hong Kong, Spain, Netherlands, Dubai, Portugal, Estonia, Morocco, Belgium, Vietnam, Canada.

This blog is written by Mr. Raj Shahani (Managing Director of RA Power Solutions India Pvt. Ltd.).

Mr. Shahani is a highly experienced business leader with rich experience of more than 40 years in the field of Power, Heavy and Shipping industry. He is Technical Adviser to many shipping and heavy industries across the globe.

Mr. Shahani is one of the most enthusiastic professionals and he has all the brilliance of an exemplary leader. Mr. Shahani is an extremely effective coach and mentor of teams and is adept at providing leadership in a global, cross-cultural environment.

 

Product Details:

Crankshaft Repairs are undertaken as manufacturers’ specifications. We use orbital crankshaft grinding machine which is portable and can be taken on site for grinding of crankshaft. The main feature of our onsite crankshaft grinding machine is that with the same on site grinding equipment we can undertake grinding of crankshaft and polishing of crankshaft. The polishing of crankshaft is done to remove the bearing line marks.

We also have ready stock of standard and under size bearings available of Wartsila, Caterpillar, Mirrlees Blackstone, Daihatsu, and all make of engines.

We extend crankshaft repair services all over the world including countries like Singapore, Malaysia, Colombia, Indonesia, Hong Kong, Spain, Netherlands, Dubai, Portugal, Estonia, Morocco, Belgium, Vietnam, Canada.

Product Details:

CKD Skoda crank shaft repair is undertaken onsite. Crankpin and main journal grinding and polishing is undertaken as per the tolerance.

Product Details:

We were approached by a company based in Singapore regarding a problem faced by them in MAN 6L 23/30 H engine crankshaft as the lubricating oil pressure was observed to be lower than the limits specified. The crankpin bearings were also found damaged.

 

RA Power Solutions has the onsite crankshaft grinding machine which is designed to undertake grinding and polishing of crank pin and main journal diameter having small bearing width.

In this case, the crank pin bearing width is only 64 mm which most of the companies based in Europe cannot execute the repair due to the want of the compact equipment.

The job of grinding was successfully executed by our technicians and engine is performing satisfactorily.

We have been regularly executing the repairs in Moldova, Belarus, Australia, Austria, Belgium, Brazil, Singapore, Dubai, Greece, Cambodia, Colombia, Denmark, Ethiopia, Ghana, Nigeria etc.

With the introduction of modern onsite crankshaft repair equipment, there is no need of removing the damaged crankshaft of air compressor, reciprocating compressor and refrigeration compressor.

The removal of the crankshaft from the compressor is not only time consuming but to pack it and send it to the workshop requires a lot of effort, expenses and longer downtime.

RA Power Solutions has the experience of more than forty years in undertaking repair of crankshafts of all types of compressors of air compressor, reciprocating compressor and refrigeration compressor. We can undertake onsite repair of the crankshaft upto the diameter ranging from 30 mm to 700 mm. The onsite crankshaft grinding machine is compact and light weight and can be easily carried to site all over the world. Due to its compact design, there is no need of disassembly of the compressor in most of the cases.

FOLLOWING ARE THE MAIN FEATURES OF ONSITE REPAIR OF CRANKSHAFT OF AIR COMPRESSOR, RECIPROCATING COMPRESSOR AND REFRIGERATION COMPRESSOR:-

·         Our technicians travel to your plant with the compact onsite crankshaft grinding machine all over the world.

·         We serve 24 x 7 basis.

·         The modern and compact design of crankshaft grinding and polishing machine facilitates to sit on the crankpin or main journal of the shaft without disassembly of the unit in most of the cases.

·         Tolerances in terms of taper and ovality can be achieved far better than the OEMs standards.

·         We can control the taper and ovality even within 0.01/0.02 mm. 

 

RA Power Solutions gives great importance to the surface finish of the crankshaft, main journal, crankpin after grinding and polishing. Our equipments are designed to maintain surface finish well within 0.2 Ra value.

Technicians with years of experience dealing with serious damage of compressor shaft are available with us. They have the ability to analyze the fault and undertake the necessary repairs.

All our technicians have a valid Indian CDC and can fly all over the world in a short notice.

The compressor crankshaft can be repaired on a low cost.

AVAILABILITY OF BABBITT WHITE METAL BEARING AND TRI METAL BEARING:-

 We have experienced that in most of the cases the companies having the compressors are not able to  arrange the undersize bearings of the crankpin and main journal due to many reasons including outdated models, closure of manufacturing facilities, delay in delivery etc. We have the principles based in Japan, Korea and Europe and we regularly supply the bearings. The white metal bearing rebabbiting is done in our plant. All the bearings supplied by us are guaranteed for satisfactory performance and are priced lower than the market price.

We have been working on all models of compressors including Ariel, Cummins, Kirloskar, Samson, Porter-Cable, Stanley-Bostitch, Campbell Hausfeld, DeWalt, Makita, Senco, ANEST IWATA, Gardner Denver, Graham Sulzer, Hitachi, Rolair Systems, Brehob, Lufkin, Zebra , Ingersoll Rand  etc

Compressors are installed in heavy industries, oil and gas sectors and are used for various applications. The compressors are generally operated continuously except for maintaining the routine maintenance schedule. Few companies and engineers are aware of that now it is possible to undertake compressor shaft machining and repair onsite even without removing it from the block.

In case of an accident of compressor shaft, crankshaft, turbine shaft, forging press shaft we have a team of technicians who travel with calibrated measuring instruments and undertake the inspection. The inspection of the compressor crankshaft includes dimensional calibration, MPI for crack detection, hardness check and various other parameters. It is generally observed that in case of seizure of bearing or accident  crankpin and main journal of crankshaft diameter gets damaged develops taper and ovality or rough surface. We have the set of latest generation onsite grinding machines by which we undertake grinding of crankshaft and polishing of crankshaft onsite without removing them from the block.

With the portable onsite crankshaft grinding machine, it is possible to maintain taper, ovality and surface finish of crankpin and main journal strictly as per the manufacturer specifications and tolerances.

The final report on our prescribed inspection formats is submitted to the client. The cost of onsite crankshaft grinding is low and saves considerable time as it does not require packing and transporting it to the workshop for repairs.

RA Power Solutions manufactures crankshaft grinding machines for last more than 40 years and can modify the equipment according to the space available at site. There are number of incidences where the special dedicated tooling is designed, manufactured and used by our engineers to successfully repair the compressor crankshaft. The availability of limited space for fitment of crankshaft grinding machine on crankpin or main journal is mainly faced in case of compressor crankshafts.

We have the solutions and can meet with your requirement of crankshaft repair in a short duration and with reasonable cost.

 

We received an emergency call from one of the diesel power plant installations in South America advising that their caterpillar diesel engine model 3616 has met with an accident and they are not able to operate the diesel generating set. Our two experienced technicians alongwith onsite crankshaft grinding machine were deputed.

DETAILS OF DIESEL POWER PLANT OF 135 MW IN SOUTH AMERICA:-

·         The diesel power plant has a capacity of 135 MW and it generates power by multiple diesel generating sets which are installed on a barge.

·         They have  number of diesel generating sets of following make and model

1. Wartsila 12V32
2. Wartsila 18V32
3. Caterpillar 3616
4. Stork 280

 THE MAJOR DETAILS OF CRANKSHAFT OF CATERPILLAR 3616:- 

 

 

 
THE CRANKSHAFT OF CATERPILLAR 3616 WAS ALSO CHECKED FOR FOLLOWING MAJOR TECHNICAL PARAMETERS:-

·     All the crankpins were subject to crack detection test by MPI and dye-penetrant test, no cracks were observed on 8 nos. of crankpin.

·         The special attention was paid on crank pin no. 3 which was damaged and seized due to bearing failure, no cracks were observed on this crankpin as well.

·         This was a sign of relief for our technicians.

·         

ACTION TAKEN BY US:-

The main objective  of RA Power Solutions is not only to repair the crankshaft for which we were  contracted but to ensure that after repairs the engine performs satisfactory since the diesel generating set was 16 years old and operated for more than 70,000 hours, RA Power Solutions Technicians calibrated connecting rods and bearings of all 8 nos. crank pins, following was checked.

 

·         Big end and small end of the connecting rod were thoroughly checked dimensionally for bore.

·         All the connecting rods matching surfaces, bolts were subject to crack detection by MPI. To our surprise, six sets of connecting rods bolts had hairline cracks. The power plant was advised to replace the connecting rod bolts as no crack on connecting rod and bolts were admissible.

 

It is the experience of RA Power Solutions that in case of failure of connecting rod or main journal bearing, the surface finish of the crank pin or main journal of the crankshaft gets seriously damaged.

OBSERVATION OF CRANKPIN AND MAIN JOURNAL OF CRANKSHAFT AFTER BEARING FAILURE:-

• Due to failure of crank pin or main journal bearings, on visual inspection the crankpin and main journal diameter develops line marks, pitting and rough surface.
• In case after failure of crank pin, the main journal bearing, the engine is not stopped on time, the radius fillet of both the sides gets damaged. In some cases, we have noticed that the lubricating oil hole profile also gets lost.
• In most of the cases, bearing failure results in sticking of bearing material on the crankshaft surface. The main reason is that the bearing steel shell rubs with the crankpin and main journal diameter, temperature abnormally increases due to friction and bearing material melts.
• Overheating due to failure of bearing shell on the crankshaft also results in black/ blue discoloration.
• The hardness increases due to abnormal heating.
• Cracks on crank pin and main journal in some of the cases are also observed.
• In case the accident is serious, it can also cause the loss of alignment of the crankshaft which becomes a serious issue for onsite repair.
• In case of above observation, certainly it is not possible to assemble the new bearings and operate the engine.

SPECIALIZATION OF RA POWER SOLUTIONS IN CRANKSHAFT MACHINING AND POLISHING ON SITE :-

RA Power Solutions specialises in repair of crankshaft onsite without removing it from the engine block. Our technicians with onsite portable crankshaft machining equipment visit your plant or board the vessel all over the world to undertake the repairs.

With more than 10, 000 crankshafts repair jobs undertaken by us, our success rate of repair of seriously damaged crankshaft is almost 100%

THE PRE INSPECTION INCLUDES FOLLOWING:-

• Dimensional inspection of crankpin and main journal.
• Checking deflection/run- out to know the loss of alignment of crankshaft if any.
• Checking of hardness.
• Crack detection by MPI, Dye – penetrant test
• Visual inspection
• The pre-inspection report of crankshaft is thoroughly studied by our technicians on site and strategy and successful repair is planned.
• The grinding of crankpin and main journal is undertaken removing the minimum stock possible. This helps in enhancing the life of the crankshaft.
• The removal of minimum stock from crank pin and main journal is possible only because of the use of the latest generation of onsite crankshaft grinding machine by us.
• The final inspection is undertaken and reports are prepared.

 

RA Power Solutions regularly undertake on site grinding of crankshaft, rotating shafts, alternator shafts, rotor shafts, turbine shafts, electric motor shafts.

RA Power Solutions undertakes onsite repair of compressor crankshafts for all applications.

COMPRESSOR CRANKSHAFTS GENERALLY REPAIRED BY US ARE OF FOLLOWING:-

• Air compressor
• Reciprocating compressor
• Hydrogen compressor
• Ammonia compressor
• Turbo Compressor
• Centrifugal Compressor
• Axial Compressor  

No requirement of disassembly of compressor and removal of compressor crankshaft. With the latest technology and equipment available for onsite repair of crankshaft, there is absolutely no requirement of even disassembly of compressor for repair of crankshaft in order to repair the compressor crankshaft. Our technicians with portable onsite compressor crankshaft repair equipment visit your site all over the world.

EXECUTION OF REPAIR OF COMPRESSOR CRANKSHAFT ONSITE:-

• After undertaking the inspection of the damaged compressor crankshaft, our technicians plan the strategy to repair it onsite.
• Our latest design  onsite crankshaft grinding machine is inserted from the engine block inspection window and grinding of crankpin is undertaken.

AVAILABILITY OF WHITE METAL BABBITT BEARINGS OR TRI METAL BEARINGS:-

• After undertaking onsite grinding of the crankshaft obviously undersize bearings are required.
• In case the compressor has white metal Babbitt bearings, we undertake the rebabbitting of bearings in-house. Infact, while the grinding of the crankshaft is under process, we start the Rebabbitting of white metal babbitt bearings.
• The final machining and bore diameter of Babbitt white metal is maintained as per the grinding size of the crankpin and main journal.
• In case of old models of compressors, we also develop and manufacture tri metal bearings as per the sample.
• We also have associates through whom we arrange the tri metal bearings for popular make and models of compressors based in different parts of world.
• Having successfully executed repair of more than 10,000 crankshafts gives us confidence of repair of any crankshaft upto 700 mm diameter all over the world.
• We have thousands of reports of compressor crankshaft which are successfully repaired by us duly signed, stamped and appreciated by the client. These reports can be shared on request.

WE HAVE BEEN REGULARLY EXECUTING CRANKSHAFT GRINDING OF ALL MAKE INCLUDING FOLLOWING COMPRESSORS :-

• Makita
• Senco
• ANEST IWATA
• Gardner Denver
• Graham Sulzer
• Hitachi
• Kirloskar
• Samson
• Porter-Cable
• Stanley-Bostitch

 

Product Details:

We were approached by a bulk carrier having MAN B&W 7L 16/24 auxiliary engines to attend their vessel in Lagos Nigeria which suffered damage to the engine block due to failure of connecting rod bolt and crankshaft as well.

Our team of two engineers, one senior technician for repair of crankshaft and second for repair of damaged engine block of MAN B&W 7L 16/24 by metal stitching and metal locking process boarded the vessel at Lagos port.

THE DETAILS OF MAN B&W 7L 16/24 ENGINE ARE AS FOLLOWING:-

 

·         Considering the local damage due to hit on CR pin by connecting rod and ovality, our technicians had no option but to undersize the crankpin no. 4 to the undersize of 2 mm and maintaining a diameter of 128.00 mm with ovality of only 0.02 mm.

·         The engine after repair of cracks of engine block by metal stitching process and crankshaft pin no. 4 after grinding of undersize of 2 mm was put back into operation.

·         This job was done by us in October 2018 at Lagos and is performing satisfactory.

·         The inspection reports duly signed by the chief engineer can be shared on request.

·         With experience of four decades in repair on accidental engines, our technicians have excellent ability to find out the fault and come out with a 100% plan of successful execution of repair.

·         In case of repair field, experience of technicians is important.

 

We have been executing the engine repairs all over the world including Benin, Burkina Faso, Cape Verde, The Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Mali, Mauritania, Niger, Nigeria, Senegal, Sierra Leone, Togo etc. 

Product Details:

RA Power Solutions achieved the milestone of undertaking grinding of six crankpins while sailing the vessel by using state of art, latest technological, advanced insitu crankshaft grinding machine. This machine is designed and manufactured by RA Power Solutions to have minimum or zero vibrations while in operation. The maintenance of close tolerance after grinding is possible only because of use of our latest design of insitu crankshaft grinding machine. We have successfully repaired crankshafts of engines Wartsila, MAN B&W, MAK, SKL, Caterpillar, Ruston, DEUTZ, Alpha B & W, Bergen, Sulzer, MTU, nohab polar, Pielstick, Hatlapa, Mitsubishi, stork werkspoor, MVM, Yanmar etc.

Contact us for more information on crankshaft grinding and crankshaft repair.

Product Details:

RA Power Solutions is the only company in the world which can undertake onsite repair of crankshafts of Daihatsu 5DC17/ Daihatsu 5DK20 without removing them from the Engine block.

The following are the primary dimensions of the Daihatsu 5DC17/Daihatsu 5DK20 crankshafts:
Daihatsu 5DC17Standard diameter of crankpin: 145 mmBearing width: 64 mm

Daihatsu 5DK20Standard diameter of crankpin: 170 mmBearing width: 78 mm


For more than 43 years, RA Power Solutions has been grinding crankshafts up to 700 diameters on-site.

More than ten thousand crankshafts have been repaired by us, and we have salvaged hundreds of them that other companies had rejected.

Product Details:

On site crankshaft grinding of crank pin and main journal is undertaken up to 700 mm without removing crankshaft from engine block. Crankpin and main journal tolerances of Crankshaft are maintained as per manual.
 

Product Details:

We undertake crankshaft repair and crankshaft grinding onsite without removing the crankshafts from the diesel engine. This process of onsite crankshaft grinding is getting popular as sending a crankshaft to workshop is outdated.

Product Details:

Onsite grinding of crankshaft, rotor shaft, turbine shaft, alternator shaft, and pump shaft is undertaken up to 700 mm diameter with portable grinding and polishing machine. Tolerances are maintained as per the manufacturer’s specifications.

Product Details:

RA Power Solutions Pvt. Ltd. undertakes onsite grinding of crankshaft. In case of Daihatsu 5DC-17, the details of crankpin diameter and bearing width are as follows:- 

 

RA Power Solutions has necessary equipment and tooling to undertake onsite grinding of small diameter of 145 mm with bearing width of only 64 mm. No other company based in Europe or Singapore has the facility to undertake grinding and polishing of Daihatsu 5DC-17.We have undertaken on site repair of nos of crankshafts of Daihatsu engine by grinding CR pins undersize upto 2.0 mm.We also supply standard, 0.5,1.0,1.5,2.0 undersize bearings.

We have been undertaking onsite repair of crankshafts for the last forty years and have executed successfully repair of more than 10,000 crankshafts of engines like Wartsila, MAN B& W, MAK, SKL, Caterpillar, Ruston, DEUTZ, Alpha B & W, Bergen, Sulzer, MTU, nohab polar, Pielstick, Hatlapa, Mitsubishi, stork werkspoor, MVM, Yanmaretc

Product Details:

We are well renowned in Crankshaft OD Grinding service provider and are known to offer best quality In Situ Crankshaft Grinding Machine. Our Crankshaft OD Grinding are easy to operate and grinding operations can be carried out on many places. The machine come in varying specifications. This machine offer excellent quality and also capable in serving needs of various industries

Product Details:

On Site crankshaft grinding and polishing is undertaken upto 700 mm. The crankshaft grinding and crankshaft polishing is possible on board the vessel while sailing.

Product Details:

RA Power Solutions Pvt. Ltd. strongly recommends periodical crankshaft polishing. The main advantages of crankshaft polishing are following:-

It is generally observed that crankpin and main journal after regular operation develop rough surface and bearing line marks. The onsite polishing removes the marks and improves the surface finish.

 Crankpin and main journal polishing results to control of taper and ovality to some extent.

On site crankpin and main journal polishing is now possible due to portable equipments available. RA Power Solutions Pvt. Ltd. suggests that whenever the engine is opened for overhaul, the crankpin should be calibrated and polished. The crankpin polishing always enhances the life of bearings and crankshaft.

Product Details:

RA Power Solutions have facilities to undertake the grinding and polishing of crank pins and main journals having small bearing length. In order to undertake the repair of the crank pin and main journal having small bearing length obviously, it needs a crankshaft grinding tool which is compact in design and can be placed on the crankpin or main journal diameter having small bearing length.

We have the onsite crankshaft grinding machines which can even undertake the grinding of small diameter and can easily be assembled on the bearing width which is as small as 40 mm.

THE REPAIR OF YANMAR  M200AL-DT CRANKSHAFT:-

This crankshaft has a diameter of 152 mm and bearing length of only 69 mm. Such types of jobs and the jobs with even the smaller bearing width are executed by us all over the world.We can share the pre and final inspection reports of crankshafts after repairs are executed by RA Power.

AVAILABILITY OF STANDARD UNDER SIZE BEARINGS OF YANMAR M200AL-DT:-

Understanding the importance of readily availability of bearing and spare parts of auxiliary and main engines, we maintain large stock of spare parts. For your requirement of standard, under size and special size of bearing and spares, you may get in touch with us.

We have been executing the repairs in Laos, Lebanon, Malaysia, Maldives, Mongolia, Nepal, North Korea, Oman, Philippines, Qatar, Russia, Saudi Arabia, Singapore, South Korea, Sri Lanka, Syria, United Arab Emirates, Yemen etc. 

Product Details:

RA Power Solutions was approached by a vessel owner regarding a problem faced by them in the crankshaft of MAN 6L 16/24 auxiliary engine.

THE ENGINE DETAILS ARE AS FOLLOWING:-

  

RA Power Solutions is the only company which has the equipment available to work on the crank pin bearing width of 56 mm only. We have successfully undertaken repair of crankshaft of 100s of MAN Engine during our working on Crankshafts for last More than four decades. We can share the pre and final inspection reports duly signed by the chief engineer of the vessel. 

We have been regularly executing the repairs in Greece, Moldova, Belarus, Australia, Austria, Belgium, Brazil, Singapore, Dubai, Cambodia, Colombia, Denmark, Ethiopia, Ghana, Nigeria etc.

Contact us for more information.

Product Details:

We were approached by a company based in Dubai advising about the damage of the crankshaft of MAN B&W CME 5L16/24 engine.

THE ENGINE DETAILS ARE AS FOLLOWING:-

 

RA Power Solutions deputed a team of two technicians to Dubai who boarded the vessel in the short notice period of 16 hours.

The joining of the vessel in such a short duration of time was possible as all our technicians have valid CDC and can board the flight immediately.

The inspection of the crankshaft was conducted.

SUCCESSFUL REPAIR OF CRANKSHAFT OF  MAN B&W CME 5L16/24 EXECUTED BY RA POWER SOLUTIONS:-

As mentioned above, the crank pin diameter of crank shaft of MAN engine is only 130 mm and bearing length is 56 mm.

RA Power Solutions have equipment which can be placed on the crank pin diameter directly and grinding of crank pin is executed.

We have undertaken hundreds of repair of crankshafts where the bearing length is small.

SUCCESSFUL REPAIR OF CRANKSHAFT OF  MAN B&W CME 5L16/24 EXECUTED BY RA POWER SOLUTIONS:-

As mentioned above, the crank pin diameter of crank shaft of MAN engine is only 130 mm and bearing length is 56 mm.

RA Power Solutions have equipment which can be placed on the crank pin diameter directly and grinding of crank pin is executed.

We have undertaken hundreds of repair of crankshafts where the bearing length is small.

This technologically advanced latest generation of crankshaft grinding equipment is only available with us and have successfully repaired  thousands of crankshaft all over the world in countries like  Greece, Moldova, Belarus, Australia, Austria, Belgium, Brazil, Cambodia, Colombia, Denmark, Ethiopia, Ghana, Haiti etc.

Product Details:

We were approached by a shipping company based in Mumbai, India to whom we have been extending on site crankshaft grinding and engine repair services for the last 30 years.

They approached us for the problem in the crankshaft of YANMAR Diesel Engine model 6N18AL-DV.         

THE ENGINE DETAILS ARE AS FOLLOWING:-

ACTION TAKEN BY RA POWER SOLUTIONS FOR REPAIR OF CRANKSHAFT OF YANMAR DIESEL ENGINE 6N18AL-DV:-

• Two technicians with onsite crankshaft grinding machine boarded the vessel and the crankshaft was subject to inspection.
• All the six crankpins were subject to calibration for taper and ovality.

 

SUCCESSFUL REPAIR OF CRANKSHAFT OF YANMAR DIESEL ENGINE 6N18AL-DV:-

• Considering the observation of higher ovality ranging from 0.16 to 0.22 mm, it was decided to undertake the grinding of all crank pins.
• All the crankpins were undersized by 0.40 mm as per the manufacturer recommendation and final size was maintained between 144.58 to 144.60 mm with ovality of maximum 0.02 mm.

 

The repair of the crankshaft having a diameter of 145 mm and bearing width of only 65 mm was executed due to availability of necessary tooling with us.

The small crankpin bearing width requires the latest crankshaft grinding equipment which is possessed by us and we have been executing successfully the repair of the crankshaft of YANMAR Diesel Engine 6N18AL-DV and other models having small bearing length all over the world.

We have been executing the repairs in Laos, Lebanon, Malaysia, Maldives, Mongolia, Nepal, North Korea, Oman, Philippines, Qatar, Russia, Saudi Arabia, Singapore, South Korea, Sri Lanka, Syria, United Arab Emirates, Yemen etc. 

 

Product Details:

 

We were approached by a ship manager advising regarding the excessive ovality developed in 8 numbers of crank pin of the crankshaft of MAN B&W 8L 23/30H.

THE MAIN DETAILS ARE AS FOLLOWING:-

 

FOLLOWING ARE THE MAIN OBSERVATIONS:-

·         Surprisingly, all 8 number of crank pins developed the ovality ranging between 0.12 mm to 0.20 mm.

·         The crankpins were subject to hardness check and it was observed within limits.

·         Crack detection test was undertaken by MPI with high intensity Magna flux torch and no crack and abnormality was observed.

·         The deflection and visual inspection was done and was found acceptable within limits.

·         The crank pins having standard diameter of 185 mm and bearing length of only 72 mm were ground by 0.50 mm undersized maintaining the tolerance within  0.02 mm.

·         The engine was put back into operation.

 

RA Power Solutions has a technology, experienced technicians through which the repair services are offered.

Our repair charges are the lowest in the world.

Avail the benefit of our experience of successfully repairing more than 10,000 crankshafts in the last 40 years and stop contacting the companies who imitate the equipment, websites, procedures etc.

We have been regularly working for various models of engine like Wartsila , Daihatsu , MWM , Caterpillar , MAN , MAK , B&W , Sulzer , Bergen , Detroit Diesel, Stork Werkspoor , Pielstick , Deutz , Yanmar , MTU , Cummins , Nohab Polar , Caterpillar , Mitsubishi , Yanmar , MAK and many more.

 

Product Details:

A leading shipping company based in Saudi Arabia reported a serious accident of their auxiliary engine no. 2 of Yanmar S185L-ST used as generator.

 
Team consisting of two technicians along with necessary calibrated  instruments and onsite crankshaft grinding machine boarded the vessel in order to access the damage to the engine and undertake necessary repairs.

MAJOR YANMAR S185L-ST ENGINE DETAILS ARE AS FOLLOWING:-

 

REPAIRS UNDERTAKEN BY RA POWER SOLUTIONS FOR SUCCESSFUL OPERATION OF CRANKSHAFT OF YANMAR S185L-ST ENGINE:-

• Initially the crank pin having a standard diameter of 140 mm and bearing width of only 62 mm was ground to 0.50 mm under size with a hope  the scratches and deep line marks will be removed.
• Since even after grinding 0.50 mm, the deep line marks were clearly visible, it was decided to under size the crank pin further by 0.5 mm.

 

MAIN FEATURES OF EXECUTING SUCCESSFUL REPAIR OF  YANMAR S185L-ST ENGINE:-

• A company has experience of more than four decades in the field of crankshaft repair having experienced technicians trained in in-house training school.
• Manufactures its own on site crankshaft grinding machine using it for the last 25 years. This facilitates us even to grind shafts in limited space available.
• Only company in the world which can undertake the grinding of small diameter and main journal like in case of Yanmar S185L-ST having a diameter of 140 mm and bearing length of only 62 mm. This really needs a compact on site crankshaft grinding machine.
• Only company in the world which can execute the grinding of crankshaft while the vessel is on move maintaining the tolerance of 0.01/0.02 mm with surface finish of less than 20 RA value.
• Maintaining under size and special size of bearings in stock, hence no time is wasted to put back the engine into operation.
• All technicians having Indian CDC can fly to any destination in the world in a short notice.
• The on site crankshaft grinding machine is carried by our technicians as an accompanied baggage and no need of booking the machine in cargo and wasting the time in custom clearance etc.
• For reduction in cost of the maintenance and to put back engines into operation , contact us.

 

 

 It is advisable to periodically get the crankshaft inspected. This is of great importance for the high capacity diesel engines having crankshaft diameter of 200 mm and above. With the latest technology available, the repair of crankshaft is possible on site without dismantling of the equipment. RA Power Solutions strongly recommends that whenever the engine is taken up for overhauling the crankpins and main journal of the crankshaft should be calibrated and as per the requirement, they should be polished and if required grinding of crankshaft should be done.

The timely repair of crankshaft by polishing or grinding enhances the life of bearing and crankshaft manifolds. Considering the high cost of crankshafts, we recommend regular inspection of the crankshaft services which are extended by us on a regular basis all over the world.