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 On site Crankshaft Grinding Machine to execute the Crankshaft Repair. The On site Crankshaft Grinding Machine has following benefits to the clients.
Crankshaft Grinding Wartsila 18 V32
The Benefits:
You do not need to remove the Cranks shaft from the engine or press.
We save your time: – some of these repairs can be carried out as little as 24 hours.
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.
We keep your plant running: – Downtime is minimized so that you can be back into operation and earning money sooner.
We cover standard Crankshaft diameter ranging from 30 mm to 700 mm.
Our patented orbital equipment rotates around damaged crankpin journal using the radius as a datum.
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 on on site crankshaft grinding, onsite crankshaft repair on vessel, onsite crankshaft machining and polishing, onsite crankshaft maintenance services, or insitu crankshaft grinding please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.
In case of accident of Crankshaft in recent past, it was necessary to disassemble the crankshaft from the engine block or housing, pack it and send it to the designated workshop.
Portable Crankshaft Grinding Machine
The Introduction of Onsite Crankshaft Grinding Machine, Insitu Crankshaft Polishing and Grinding Machine, and Crankshaft Machining, there is no need of removing the Crankshaft and sending it to the work shop as now it is possible to undertake crankshaft grinding and crankshaft repair with revolutionary design of Onsite Crankshaft Grinding Machines manufactured by RA Power solutions.
The Onsite Crankshaft Grinding Machine has been developed out of our experience of Crankshaft repair of Forty Years. The Machine is Lightweight and can be taken to the Site. It has the following Features.
Onsite Crankshaft Grinding Machine, Insitu Crankshaft Polishing, and Grinding Machine is manufactured by RAP after extensive research, development, and our experience.
The Machine in the Initial Years was used by our technicians for In-house applications. Now from last ten years Machine is sold in open market all over the world.
The Insitu Crankshaft Grinding and Polishing Machine is user-friendly and can be operated by any person having basic machining knowledge.
The Machine is capable and is designed to maintain the close dimensions and Geometrical tolerances as per the manufacturers requirement.
Presently Onsite Crankshaft Grinding Machine is manufactured for the diameter of the Crank-pin and Main Journal of the Crankshaft ranging from 30 mm to 700 mm.
Crankshaft Grinding Machine is manufactured out of Titanium Alloy which is lightweight and can be easily carried to the Site.
The Machine is capable of working on a Vessel while it is moving.
Training forms an integral part of the Crankshaft Grinding Machine. Training onsite is provided.
We have sold more than seventy machines all over the world and are priced cheapest in the International Market.
Onsite Crankshaft Grinding Machine Ready for Dispatch
Onsite Grinding Machine for Small Diameter
For more details on insitu crankshaft grinding equipment, portable crankshaft grinding machine or onsite crankshaft grinding and polishing please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.
RA Power Solutions undertakes the Grinding of Crankshaft of High Capacity Engines used in Shipping companies, Power plants, and in various other sectors. The company has experience of more than forty years in undertaking successful repair of Crankshafts and major components. As we are aware Crankshaft is the heart of the engine and is the most expensive part with limited availability of particular make and model.
Our expertise lies in the repair of crankshafts that meets with a serious accident like a Seizure of a bearing. It is generally observed that due to rubbing of the bearing steel surface with the CR Pin diameter, excessive heat is generated. Thus there is an increase in Hardness. Every manufacturer specifies the maximum limit of Hardness.
Damaged CrankPin of Mirrlees Blackstone Engine
Inspection of Crankpin Under Process
In the case of Mirrlees Blackstone K and KV, major series of engines, the normal hardness at the time of manufacturing of the crankshaft is between 21.5 to 26 on HRC Scale (241 to 268 on the HB scale). It is obvious that after the seizure of the bearing, the hardness increases even to the level of 45 to 50 HRC.
The Mirrlees Blackstone allows the higher hardness under a deviation maximum of up to 32 HRC against the standard of a maximum of 26 HRC. In normal situations as per the manufacturer, the crankshaft stands rejected as it has far higher Hardness than the stipulated in the manual.
RA Power took the following action to save the Crankshaft.
The Hardness was taken on various spots, not having a gap of more than 15 mm.
Hardness was recorded and a maximum hardness of 50 HRC was observed.
Since bearing line marks, taper, and ovality on the crank pin were observed, the grinding was undertaken and CR Pin dia was reduced by 3.5 mm approx.
The Hardness was reduced and the maximum Hardness of 42 HRC was observed in a few spots. Although the 42 HRC Hardness was on the higher side than the maximum limit of 32 HRC specified by the manufacturer. The Crankshaft was accepted under deviation due to the following reasons:
The higher Hardness was observed in a scattered pattern.
The higher hardness was away from the Lubricating Oil Hole and radius fillet of the CR Pin which are considered to be critical Zone.
The versatility of RA Power Solutions crankshaft grinders caters to a wide range of marine and industrial crankshafts, irrespective of their size and design.
The Crankshaft was accepted and his performance is observed as satisfactory from last more than three and half years. The saving of the Crankshaft from rejection was possible only due to the Experience RA Power Solutions has of successful repair of more than ten thousand crankshafts.
RA Power Solutions undertakes Crankshaft Repair, Crankshaft Grinding and offers Onsite Crankshaft Machines to repair companies. We are a leading provider of crankshaft grinding and repair services, specializing in utilizing state-of-the-art crankshaft grinders.
With our state-of-the-art crankshaft grinders and highly skilled technicians, we can accurately recondition damaged or worn-out crankshafts to the original manufacturer’s specifications. By using advanced techniques and precision machinery, RA Power Solutions ensures that the repaired crankshafts regain their perfect alignment, surface finish, and dimensional integrity. Whether it’s a large marine engine or a compact generator, their expertise and commitment to quality make them a reliable choice for any crankshaft-related concerns.
With the use of RA Power Solutions crankshaft grinders, a significant decrease in downtime and repair costs can be achieved, allowing businesses to maintain productivity and efficiency.
Note: The writer of this article is Mr. Raj Shahani, Managing Director of RA Power Solutions Pvt Ltd.
Grinding & Repair of Crankpin is in Process
Finished Crankpin after Grinding & Repair
For more details on in situ crankshaft grinding and repair, crankshaft grinders, crankshaft grinding repair services, or crankshaft machining contact today by email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.
In case of failure of crankshaft or bearing on a vessel/stationary power plant it results to extremely high cost for repairs and with long downtime. RA Power Solutions manufactures and exports onsite and insitu crankshaft grinding, and crankshaft grinding machine which saves considerable cost of repair and save time as disassembly of the crankshaft and transport to the workshop is not required.
Portable Crankshaft Grinding Machine
The insitu crankshaft grinding machine performs and delivers the same quality standards which are achieved by old-designed, conventional bench-type crankshaft grinding machine.
Advantages of using RA Power Solutions Onsite Crankshaft Grinding Machine and Mobile Machine:
The company having more than 40 years of experience in grinding and repair of crankshafts of high-capacity marine and industrial engines and understands the importance of maintaining tolerances as per OEMs.
It is a highly advanced technology grinding machine which is designed to take the stress while machining and polishing of crankshaft, crankpin, and main journal.
Crankshaft Grinding Machine is lightweight and compact and can be easily taken to the site all over the world as accompanied baggage.
Crankshaft Grinding Machine Packed For Dispatch
Crankshaft Grinding Machine Accessories Packed for Dispatch
Customized tooling adapting to all makes of engine and models. Machine available in the range of 60 mm to 700 mm.
Onsite Crankshaft Machine is easy to operate and training is provided.
Machine body is made from titanium which results to the minimum vibration while in operation. Machines can be used on vessel while sailing.
The machine is designed to undertake onsite repair of crankshaft of all popular model of engines like Yanmar, Wartsila, Daihatsu, Man B&W, Mirrlees Blackstone, Ruston & Caterpillar, etc.
The company has sold more than 70 machines all over the world. It is highly recommended for repair workshops, power plants, shipping, and engineering companies.
For more information on crankshaft repair tools, and crankshaft grinding, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.
Grinding of Crankshaft on a Moving Vessel
Grinding of Crankshaft in a Power Plant by Crankshaft Grinder
Grinding of Crankshaft on VBlock by Crankshaft Grinding Machine
CKD Skoda engines of different capacities are installed all over the world for various applications. For the last two decades, the production of CKD Skoda engines and spare parts is stopped causing inconvenience to the CKD Skoda DG sets installation. RA Power Solutions manufactures white metal and tri metal bearings of crank-pin and main journal for all models of CKD Skoda engines. The bearings are manufactured in a modern workshop having the latest breed of equipment following advanced technology and process.
CKD (SKODA) Engine Bearings
The experience of four decades in dealing with CKD Skoda generators and spares has helped us in developing and manufacturing CKD Skoda spare parts of a quality that is far superior to the OEMs. This is acknowledged by the companies based in the Czech Republic importing container loads of bearings, cylinder liners, and various spare parts from RA Power Solutions.
Inspection of Engine Bearings
CKD SKODA Bearings
Each part of the CKD Skoda engine exported by RA Power Solutions is subject to stringent quality control norms followed by us. We are priced the lowest in the world.
CKD Skoda engine bearings, cylinder liners and various spare parts are readily available in stock and are exported worldwide for following models of CKD SKODA engines:
OUTPUT (kVA)
FREQUENCY (Hz)
VOLTAGE (V)
DIESEL ENGINE
RPM
405
50
400/231
6S275III
600
405
50
400/231
6-27,5 A0S
600
500
50
400/231
6S275PN
500
608
50
400/231
6S275IIIPN
600
608
50
400/231
6-27,5 A2S
600
825
50
400/231
6S275IIIPV
600
825
50
400/231
6-27,5 A4S
600
860
50
400/231
6S350PN
375
860
50
6300
6S350PN
375
860
50
11000
6S350PN
375
1525
50
6300
9S350IIPS
375
1525
50
11000
9S350IIPS
375
1525
50
6300
9TS35/50-2
375
1525
50
11000
9TS35/50-2
375
1600
50
400/231
6-27,5 B8S
750
1600
50
6300
6-27,5 B8S
750
1600
50
11000
6-27,5 B8S
750
2140
50
6300
6-27,5 B8S
750
2140
50
11000
6-27,5 B8S
750
2270
50
6300
6-38 A6S
500
2270
50
11000
6-38 A6S
500
BEZ Generator Bearings for CKD Skoda Engine
Our association with CKD Skoda engines is of more than forty years. We have been regularly manufacturing white metal crank pins and main journal bearings for different models of CKD Skoda engines. The white metal bearings are manufactured by a centrifugal system.
We are also manufacturing BEZ alternator bearings not only for CKD Skoda engines but for all makes and models of engines that are fitted with BEZ alternator bearings. We have in stock most of the popular models of BEZ generator bearings or the bearings are manufactured as per the drawing or a sample provided by the client.
BEZ Generator Bearings after Machining
BEZ Generator Bearing
For more information on BEZ alternator Babbitt white metal bearing, babbitt white metal bearings, tri metal bearing, and Babbitt white metal manufacturer please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.
Crankshaft is the heart of every engine. It is estimated that the cost of crankshaft is almost 30 to 35% of the total cost of engine. RA Power Solutions considers and treats every crankshaft with the greatest attention. The inexpertly ground crankshaft can lead to the failure of bearing and crankshaft in totality causing considerable damage and loses to the owners.
Onsite Crankpin Grinding and Crankpin Polishing
RA Power Solutions undertakes onsite crankpin grinding and crankpin polishing in one setting. The portable, light weight onsite crankshaft grinding machine is taken to the site. The crankshaft grinding machine is designed in such a way that it can undertake the crankshaft machining, crankshaft grinding and crankshaft polishing in one setting.
The forty-three years of experience of our company and staff guarantees machining, grinding, and polishing of crankshaft to the highest professional standards strictly in accordance to the tolerances stipulated by the manufacturers. Our experience of working on crankshaft and the trust of our clients have resulted to successfully repair of more than 10,000 crankshafts Worldwide.
The services of crankshaft grinding and crankshaft polishing are extended for all the applications including forging hammers, marine and industrial.Our location in India gives us an opportunity to serve our clients in Middle East Asia and European countries.
Damaged Crankpin of Marine Engine
Onsite Crankshaft Grinding Machine – Grinding Crankpin on Board a Vessel
Technician’s having Indian CDC can sail on the vessel and can execute the repairs. The main advantage of availing RA Power Solutions services is not only limited to the availability of experienced technicians but all the repairs like metal stitching, repair of major parts, dismantling and overhauling of DG sets is also offered.
We stand guarantee for all the jobs executed by us for successful repair of the engine in totality.
For more information on crankpin grinding and repair, grinding of crankpin, crankshaft grinding repair services, insitu crankpin grinding, or crankshaft polishing please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.
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 crankpin grinding 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
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
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:
Engine block repair by metal stitching and metal locking, line boring and other process.
Repair of major parts like cylinder heads, connecting rods, cylinder liners, etc.
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 on onsite grinding and repair of crankpin, engine overhauling services or insitu crankpin grinding please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.
RA Power Solutions was recently approached by a diesel power plant based in South America having Wartsila 12V32 and Wartsila 18V32 diesel generating sets.
Broken Engine Block of Wartsila Diesel Engine
A serious accident took place due to failure of cylinder liner resulting in to the damage of various parts including lower and upper engine block of Wartsila 18V32 engine. On investigation by RA Power Solutions technicians it was observed that upper and lower engine block suffered severe multiple cracks measuring to total 2900 mm in length and damage of casting into small pieces measuring 300 X 460 mm.
Various options were discussed and it was decided to replace the lower and upper crankcase. The cost of replacement of damage lower and upper engine block of Wartsila 18V 32 was exorbitant with a delivery period of 9 months. RA Power Solutions proposed to repair the multiple cracks and damaged portion by metal stitching and metal locking process. This is a cold process of crack repair and has been followed by our technicians in number of installations all over the world during our service to the industry for last four decades.
Casting Piece Given Profile as per Damaged Engine Block
Special Metal Locks and Keys Used in Metal Stitching Process
The damaged portion of the engine block was given a discipline profile and new piece of casting having similar metallurgical properties as of the parent material was placed and metal stitched using the latest design of metal stitching locks and keys. The multiple cracks were properly marked by our technicians using the latest MPI equipment to identify the cracks. The multiple cracks were also repaired by metal stitching and metal locking process.
RA Power Solutions also undertook the onsite grinding of crankshaft which got damaged due to accident and re-assembled the engine in 16 days time. All these repairs were conducted in-house with the onsite portable equipments which were carried to the site by the technicians. Perhaps no other company in the world can offer all repair services under the same roof.
Special Keys Used in Metal Stitching
Metal Stitching Of Engine Block is in Process
The engine is performing satisfactory.
RA Power Solutions specializes in cast iron repairs, utilizes advance metal stitching and metal locking processes that are ideal and most suited for this type of crack repair.
RA Power Solutions takes the pride to announce that in our four decades of experience, we were able to save millions of dollars of end users by undertaking the onsite repairs of damaged parts avoiding the expenses towards the cost of new parts which are exorbitantly priced with long delivery.
We have a dedicated team to undertake the repair of crack and damaged enginecomponents. It is possible to undertake metal stitching and metal locking for repairs of crack on a moving vessel.
Repair of Damaged Engine Block by RA Power Technician
Repair of Engine Block by Metal Stitching/Metal Locking While Vessel is Sailing
Technicians can join the vessel in short time as they carry seaman passport. As an Indian company we are respected for our sincerity, experience and lowest cost.
For more information on engine block repair and damage engine block repair, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.
Sulzer model 6RTA Engine was reported damaged on high seas near Mombasa on transit to Sri Lanka. On investigation, it was observed that the connecting rod bolts got sheared damaging the lower and upper engine block and three crankpins of the Crankshaft.
A team of RA Power Solutions technicians having experience in undertaking insitu 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
On preliminary examination, multiple cracks on the upper and lower crack cases of the 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 an onsite crankshaft grinding machine. All pins were undersized to 1.5 mm due to the damage.
Grinding of Crankpin on Board a Vessel
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, and sincerity of technicians have been very much appreciated by the owners. This achievement was possible due to RA Power Solutions having the latest design of equipment, and experienced technicians having Indian CDC.
The Introduction of Onsite Crankshaft Grinding Machine, Insitu Crankshaft Polishing and Grinding Machine, and Crankshaft Machining, there is no need of removing the Crankshaft and sending it to the work shop as now it is possible to undertake crankshaft grinding and crankshaft repair with revolutionary design of Onsite Crankshaft Grinding Machines manufactured by RA Power solutions.
Onsite grinding of crankshaft without removing it from the engine block is undertaken by taking the reference of radius fillet.
The onsite crankshaft grinding machine is placed on both side of the radius of the crankpin and tool rotates undertaking grinding and polishing of crankshaft. This process of crankshaft grinding by insitu crankshaft grinding machine is successful generally for the diameter of the crankpin of 200 mm and above having a bearing width of 125 mm minimum.
Crankshaft Grinding Equipment from 30 mm Diameter
Insitu Crankshaft Grinder
For the smaller diameter of the crankpin, it is not possible to undertake the grinding by taking the reference of radius fillet due to the space constraints.
RA Power Solutions has introduced a compact, easy to operate onsite crankshaft grinding machine which is suitable for grinding and polishing of small diameters of the crankpin above 30 mm. The crankpin bearing width can be as small as 30 to 40 mm. With this latest technological advance crankshaft grinding machine, it is easy to grind the smaller diameter of the crankpin having smaller crankpin bearing width.
The crankshaft grinding machine has the main features of machining, grinding and polishing of the crankpin. The tolerances in terms of taper, ovality, and surface finish are maintained far better than the manufacturer’s recommendation.
Onsite Grinding Machine for Small Diameter
RA Power Solutions having 4 decades of experience in in situ crankshaft grinding have executed successfully repair of more than 11,000 crankshaft all over the world and are leaders in this field.
