• Crankshafts are critical components in engines used across industries

• Wear and damage affect engine efficiency and reliability

• Precision machines are required to restore crankshaft geometry

• Modern industries demand portable, high-accuracy grinding solutions

What is a Crankshaft Grinding Machine?

• A specialized machine used to grind and restore crankshaft journals and crankpins

• Ensures dimensional accuracy and surface finish

• Additionally, designed for both workshop and onsite (in-situ) applications

• Essential for engine rebuilding and maintenance

Role of Crankshaft Grinding Machine Manufacturers

• Design and develop precision-engineered machines

• Ensure durability and performance under industrial conditions

• Provide machines capable of handling various crankshaft sizes

• Focus on innovation for portability and ease of use

Key Features of Modern Crankshaft Grinding Machines

• Portable Design—Easy to transport and install onsite

• High Precision—Maintains OEM tolerances

• Versatility—Suitable for marine, power, and industrial engines

• Compact Structure—Works in confined engine spaces

• User-Friendly Operation—Quick setup and minimal downtime

Onsite Capability – A Major Advancement

• Machines designed for in situ crankshaft grinding without removing the crankshaft

• Reduces dependency on workshop-based repairs

• Ideal for remote, offshore, and heavy industrial environments

• Enables faster repair cycles and operational continuity

Advantages of Using Advanced Grinding Machines

• Improves crankshaft life and performance

• Ensures precise alignment and finish

• Reduces repair time significantly

• Minimizes operational costs for businesses

• Supports preventive and corrective maintenance

R A Power Solutions – Leading Manufacturer

• Trusted manufacturer of crankshaft grinding machines

• Over four decades of engineering expertise

• Machines designed for onsite and heavy-duty applications

• Proven performance across global industries, including South Africa

• Continuous innovation to meet modern industrial requirements

Applications Across Industries in South Africa

• Marine engines and the shipping industry

• Mining and heavy equipment

• Power generation plants

• Oil & gas sector

• Industrial manufacturing units

Why Businesses Choose the Right Manufacturer

• Reliability and machine performance

• Precision and consistent output

• Long-term durability

• Technical support and expertise

• Ability to handle complex grinding requirements

For more information regarding crankshaft grinding machine manufacturers and onsite crankshaft grinding solutions:

Email us at rajshahani@rapowersolutions.com, info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

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Features of the Crankshaft Grinding Machine

1. Portable Design:

• Crankshaft grinding machine specifically developed for onsite crank pin grinding and polishing in confined spaces.
• Eliminates the need to remove the crankshaft from the entablature, minimizing downtime.
• Lightweight and Ergonomic:
• We continuously optimize component weight to ensure easy handling and global transportation.
• Designed for operator comfort and convenience during repair operations.

2. High-Quality Construction:

• We build the main body with high-grade titanium alloy for unmatched strength and vibration control.

3. Precision and Performance:

• Capable of maintaining close tolerances of 0.02 mm.
• The crankshaft grinding machine is used even while the vessel is sailing, ensuring uninterrupted operations.

4. Single-Setting Operation:

• Both crankpin and main journal grinding and polishing can be performed in one setup.
• Eliminates the need for multiple adjustments during operation.

5. Versatile Functionality:

• Suitable for honing and polishing when damage is minor, without reducing the crankshaft diameter.
• Effectively removes surface line marks, pitting, and rust to improve surface finish.

6. Complete Supply Package:

• Delivered with all necessary consumables, sufficient to grind or polish one complete crankshaft.

7. Training and Support:

• A senior technician is deputed to the client’s site for comprehensive training.
• Training covers equipment operation, handling, and maintenance.

The Crankshaft Grinding Machine isn’t just portable—it’s precise.

We’re talking accuracy within 10 microns (that’s micrometer-level precision), with surface finishing that complies with international quality standards. It’s lightweight, simple to carry, and super user-friendly.

Technicians don’t need to be hardcore specialists. With a quick 1-week training (yes, literally just a week), they’re able to grind and polish crankshafts like pros.

In Situ Crankshaft Grinding Machine | R A Power Solutions

RA Power Solutions has already delivered 1500+ crankshaft grinding and polishing machines worldwide, powering industries like:

• Marine & shipping fleets
• Repair & maintenance workshops
• Heavy engineering plants

These machines aren’t just tools—they’re profit boosters.
Less downtime means more productivity, which saves more money.

For any information, please email us at rajshahani@rapowersolutions.com, info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

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Onsite Crankshaft Grinding Machine developed & manufactured by RA Power Solutions:

RA Power Solutions has been providing crankshaft repair services worldwide for the last forty-five years. To meet changing customer demands, we introduced an onsite crankshaft grinding machine that has revolutionized the grinding process.

Design and construction of an onsite crankshaft grinding machine:

1. Amazing technology and precise engineering are applied to the development and manufacturing of crankshaft grinding machines.
2. The main frame of the crankshaft grinding machine is manufactured from titanium alloy. It is lightweight and absorbs vibrations.
3. Ours is the only crankshaft grinding machine in the world that can execute grinding and polishing while sailing of the vessel.
4. Easy to operate and easy to learn.
5. We provide training on the operation and maintenance of crankshaft grinding machines.
6. With our competencies, experience, and simple methodology, the crankshaft repair has become simple and easy.

Selection of an In-Situ crankshaft grinding machine:

Our team of highly experienced engineers thoroughly studies the client’s requirements, engine make, and model for the crankshaft repair. Based on these requirements, they design and recommend the appropriate model of the crankshaft grinding machine.

We analyze the possible grinding problem and provide the customers with quick solutions.

 Quality and Testing of Grinding Machine:

Every part of the machine undergoes the quality control inspection and geometrical test, capability test, and other examination as per the protocol.

Crankshaft Grinding Machine Ready for Dispatch	Portable Crankshaft Grinding/ Polishing machine

Lowest Cost:

The machine costs are considerably low, and you can recover the investment after completing just 3–4 jobs. Therefore, we have sold more than seventy-seven onsite crankshaft grinding machines all over the world.

For your requirement of onsite portable crankshaft grinding machine, <strong>onsite repairing services, and crankshaft grinders, contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131, 9810012383.

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Having sold more than 70 Crankshaft grinding and polishing machines we are popularly known as crankshaft specialists.The machines sold by us world wide are used for Main & Auxiliary engines, Compressors, Locomotives, Earth moving & Marine applications.

RA Power Solutions designs, develops, and manufactures a complete range of crankshaft grinding and polishing machines, from a small diameter of 30 mm to a large diameter of 700 mm. These machines are used mainly for the repair of damaged or burned-out Crankshafts on site.

There is absolutely no requirement of removing the crankshaft from the block and sending it to the workshop when RA Power Solutions is called into help & support. In fact, after the introduction of this onsite crankshaft grinding machine by RA Power Solutions, a number of companies having large bench type crankshaft grinding machines,have had to shut down their operations.

Crankshaft Grinding Machine with the most advanced technology

With our experience in repairing more than ten thousand crankshafts successfully in the last four decades. We can design and produce crankshaft grinding machines with the most advanced mechanical solutions.

The crankshaft grinding machine manufactured by us is the most sophisticated machine available today in the market.

The movement, the control and the measurement is the combination of our experience and the material selected by us for the manufacturing of this machine.

Our concept and design is far ahead of the companies that are still using old technology. They undertaking the grinding of crankpin & main journal by taking the reference of radius fillet.

Structure of Crankshaft Grinding Machine:

The design of the machine and selection of raw material makes the machine suitable to grind large crankshafts having diameter upto 700 mm.

The main body of the equipment is manufactured out of Titanium steel which provides capability of grinding heavy crankshafts with large crank pins and main journal diameters.

The orbital system permits maintenance of the accuracy of the crankshaft geometry in terms of taper, ovality and surface finish.

Despite its strong structure, the crankshaft grinding machine is lightweight. This allows technicians to easily carry it to sites around the world.

Portable Crankshaft Grinding/ Polishing Machine	On-site crankshaft grinding machine

The key features of this technology are as follows:

1. CNC Orbital grinding technology.
2. Linear motor technology.
3. In process gauging.

Manufacturing Quality:

RA Power Solutions manufactures the main structure of the crankshaft grinding machine from titanium steel. This creates a thermally stabilized, strong structure.

The moving parts are manufactured by skilled operators and on CNC equipment. In order to secure the highest precision and tolerance for grinding & polishing.

It is our constant endeavour to improve the design of the machine and to maintain the following:

1. Reduce the vibration of the machine.
2. Keep the temperature constant and low.
3. Improvement in strength.
4. Control over the weight of the machine.
5. Keep the cost low.

For more information on crankshaft grinding machine and crankshaft grinders, contact us on rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131, +91 9810012383.

Crankshaft Grinding Machine ready for dispatch	Accessories used in the Crankshaft grinding machine

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In the case of heavy equipment, it is not practical to remove the shaft and send it to the workshop for repairs. Several countries do not have the facilities for the inspection and machining of heavy-duty shafts, including engine crankshafts. The companies are left with only two options one is to either reject the shaft and replace it with a new one or send the shaft to a third country for repairs. Both options are not only expensive but are time-consuming, which no industry can afford.

Introduction of the Onsite Machining and Polishing Machine by RA Power Solutions

RA Power Solutions has a background in working on engine crankshaft, rotor, alternator, turbine, and cylindrical shaft repair for more than 45 years. During our service to the industry in remote locations, we realized the need to design, develop, and manufacture onsite machining and polishing machines. Two decades ago, we introduced onsite crankshaft and cylindrical shaft grinding machines. Since then, we have continuously improved their design, metallurgy, and structure.

We confidently claim that our crankshaft polishing tool and crankshaft polisher machine deliver the best tolerance control in the world. We design and manufacture each machine in-house. Our team conducts extensive trials at our dedicated training school before dispatching the engine crankshaft grinding machine to the end user.

The following are the Main Advantages of the Crankshaft Polisher Tool or Machine:

• Presently, the onsite crankshaft polisher machine is available up to a diameter of 700 mm.
• portable crankshaft polisher, lightweight, easy-to-carry engine crankshaft grinding machine.
• Crankshaft polisher machines are capable of maintaining tolerances far better than the manufacturer’s specifications and tolerances.
• Very easy to operate.
• Training for one week onsite is enough.
• We also extend training on crankshaft polishing machine and maintenance of machine in our dedicated training school based near New Delhi International Airport.
• Crankshaft polisher and grinder machine has a long life and is designed to undertake grinding and polishing of engine crankshafts of all popular engines installed on vessels or in industries.
• Priced very low in comparison to bench-type machines.
• Short deliveries are possible.

Our machines work efficiently on all makes of engine crankshafts. These include Wartsila, Daihatsu, MWM, Caterpillar, MAN, MaK, B&W, Sulzer, Bergen, Detroit Diesel, Stork Werkspoor, Pielstick, Deutz, Yanmar, MTU, Cummins, Nohab Polar, and Mitsubishi. They also cover specific models such as MaK 551, 552, 453, 451 AK, 452 AK, Deutz 540, 358, 350, Pielstick PC 2.2, PC 2.5, Wartsila 524, 824 TS, and Sulzer 6 AL 25/30. The list continues to grow as we adapt our machines for more engine types.

For more information engine Onsite Crankshaft Grinding Machine , crankshaft polishing on vessel and crankshaft polisher machine contact us on rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.

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In this blog, we will compare the grinding and repair of crankshaft on a CNC bench-type crankshaft grinding machine installed in the workshop and onsite crankshaft grinding by a portable and easy to carry to any site all over the world crankshaft grinder, which is considered to be a revolutionary invention for crankshaft repair and crankshaft grinding.

DISADVANTAGES OF CNC CRANKSHAFT GRINDING MACHINE BENCH TYPE FOR REPAIR AND GRINDING OF CRANKSHAFT:-

1. The main disadvantage of installing a CNC crankshaft grinding machine is that it needs a heavy workshop with all amenities.
2. Technicians must remove the crankshaft from the engine block, pack it properly, and transport it to the workshop where the team has installed the crankshaft grinding machine.
3. This whole exercise is not only expensive but also takes a lot of time.
4. In case of ships, it is rather impossible to remove the crankshaft of the main and auxiliary engines and send it to the workshop.
5. Workshops ideally use CNC crankshaft grinding machines today for production purposes. Manufacturers primarily use them to produce new crankshafts.
6. High cost of the machine and the infrastructure required.

ADVANTAGE OF HAVING ONSITE PORTABLE CRANKSHAFT GRINDER:-

1. The foremost advantage of an onsite portable crankshaft grinder is that the grinding machine can be taken to any site all over the world, including on vessels.
2. Technicians do not need to remove the crankshaft from the engine block. Removing it usually requires the special attention of engine manufacturer engineers to disassemble the engine.
3. While reassembling a crankshaft, technicians require several spare parts. These include packing, gaskets, and other components after removing the crankshaft from the engine block.
4. The portable crankshaft grinder is inserted from the inspection window of engine block and grinding/polishing/machining as per the requirement is undertaken.
5. The time taken for onsite crankshaft repair is minimum as there is no requirement of removing the crankshaft and transporting it to the designated workshop.
6. The cost of using a portable crankshaft grinder is low.

MANUFACTURING, EXPORT, AND TRAINING OF ONSITE CRANKSHAFT GRINDER MACHINE:-

1. RA Power Solutions, with 45 years of experience as a crankshaft grinder machine manufacturer and engine repair service provider, has introduced a portable crankshaft grinder. The machine is lightweight and technicians can easily take it to the site by air as accompanied baggage.
2. The grinding and polishing of the same crankshaft grinder equipment is possible in one setting.
3. The crankshaft grinder is easy to operate. We offer one week of free training to the client’s technician at our training school near New Delhi. Alternatively, we send our senior engineer to the client’s workshop for on-site training.
4. Currently, manufacturers produce on-site crankshaft grinders in the range of 35 mm to 700 mm. We are developing a crankshaft grinder up to 1000 mm and will launch it in the international market shortly.

COST OF ONSITE CRANKSHAFT GRINDER MACHINE:-

1. The cost of on-site crankshaft grinder machines is negligible.
2. We have sold all over the world, insitu portable crankshaft grinding machines number exceeding 70.
3. Our present clients come from shipping companies, power plants, and heavy industries. They use crankshafts and cylindrical grinders.
4. Engine repair workshops using RA Power Solutions crankshaft grinding machines have challenged expensive European repair companies. These workshops have expanded. They generate high revenue.

Worldwide Services:

We provide crankshaft grinders machines / Crankshaft Grinder Machine Manufacturers in countries like Australia, Bangladesh, Cambodia, Chinese Mainland, Hong Kong, Indonesia, Japan, Malaysia, Maldives, Myanmar, New Caledonia, New Zealand, Philippines, Singapore, South Korea, Sri Lanka, Thailand, Vietnam, Afghanistan, Bahrain, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Qatar, Saudi Arabia, Syria, United Arab Emirates, Yemen, Singapore etc.

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

For more information,  Crankshaft Grinder Machine Manufacturers ,supplier of crankshaft grinder, manufacturer of crankshaft grinder, Onsite Crankshaft Grinding Machine Supplier, and crankshaft grinding machine manufacturer contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at+91 9582647131 or +91 9810012383.

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We were approached by a shipping company based in Mumbai, India, to whom we have been extending on site crankshaft grinding and Onsite Crankshaft Repair services for the last 45 years.

They approached us about the problem in the crankshaft of the 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 an onsite crankshaft grinding machine boarded the vessel, and the crankshaft was subject to inspection.
• All six crankpins were subject to calibration for taper and ovality.

THE DIMENSIONS WERE CHECKED AS PER RA POWER SOLUTIONS PROTOCOL, WHICH IS MENTIONED BELOW:-

STANDARD DIMENSION OF CRANK PIN – 145.00 MM

STANDARD /SPECIFIED NO.                                                                                        SIZES IN MM

                                                                             SIZE OF CR PINS

• We inspected the hardness of all crankpins. The readings ranged from 590 to 650 HB.
• We carried out an MPI test on the crank pins to detect cracks. The test showed no cracks.
• We checked the deflection of the crankshaft. The readings were within limits.

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

• We observed higher ovality ranging from 0.16 to 0.22 mm. Based on this, we decided to grind all the crank pins.
• We ground all the crankpins undersize by 0.40 mm as per the manufacturer’s recommendation. The final size ranged from 144.58 to 144.60 mm. We maintained a maximum ovality of 0.02 mm..

THE FINAL DIMENSIONS MAINTAINED AFTER GRINDING ARE MENTIONED BELOW:-

STANDARD DIMENSION – 145.00 MM

STANDARD /SPECIFIED NO.                                                                                        SIZES IN MM

                                                                             SIZE OF CR PINS

Precision Repair of Yanmar Diesel Engine Crankshafts

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.

In our 45 years of experience we have executed successfully repair of more than ten thousand Crankshafts.We strictly maintain all tolerances stipulated by the manufacturer.

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.

For more information on Onsite Crankshaft Repair, Yanmar Crankshaft Repair, onboard crankshaft repair, insitu machining equipment, crankpin journal repair, and ship crankshaft machining, contact us at rajshahani@rapowersolutions.com, info@rapowersolutions.com, or call us at +91-9582647131 or +919810012383.

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Manufacturing of Crankshaft Grinding Machine, Crankshaft Repair Machine, and Crankshaft Grinder

RA Power Solutions has been working on the crankshafts of medium and high capacity engines for more than four decades. We realized that a few companies based in Europe have made these services a monopoly business, and projected crankshaft grinding and crankshaft repair as a difficult task. They also charged an exorbitant amount from the shipping companies, diesel power plants, and companies having rotator equipment. RA Power Solutions Pvt. Ltd. developed an onsite crankshaft grinding machine, which is capable of undertaking the grinding of the crankshaft onsite without the removal of the crankshaft from the engine block. The crankshaft grinding and crankshaft repair tools is possible by inserting the portable and light-weight machine from the inspection window. We are presently manufacturing crankshaft grinding and repair machines having a range from 35 mm to 700 mm, which largely covers most of the popular makes and models of engine crankshafts.

The crankshaft grinding machine has the following features:-

Crankshaft Grinding Machine, Crankshaft Repair Machine, and Crankshaft Grinder main features are:-

1. A lightweight, portable crankshaft grinding machine can be taken to any site all over the world.
2. We pack the machine in steel or wooden boxes. Clients can carry it by air as accompanied baggage.
3. Capable of undertaking crankpin and main journal grinding, maintaining tolerances within 0.02 mm in terms of taper and ovality.
4. Crankshaft grinding is capable of maintaining a high surface finish far superior to the international standards.
5. The machine is supplied completely in all respects, ready to use at the client’s premises.
6. Easy to maintain and operate.
7. The machine is supplied in two variants: electric/pneumatic drive.
8. We provide free training for operating the crankshaft grinding machine. Clients can receive the training at their premises or in our workshop.
9. The crankshaft repair machine costs significantly less than conventional bench-type machines available on the market. The traditional machines are now outdated.

Globally Services Provider: RA Power Solutions

More than 1000 machines are supplied. The utility of the crankshaft grinding machine is most useful during the time of the pandemic due to the spread of COVID-19 all over the world, there is a complete ban on travel all over the world. The wear and tear, accidents of engines does take place on vessels, diesel power plants, and industries, etc. The end user cannot wait for the air travel to start.

Two of our clients, one based in Guayaquil, Ecuador, and the other in Singapore—used RA Power Solutions’ onsite crankshaft grinding machine to repair damaged crankshafts. The client in Ecuador repaired the crankshaft of a Wartsila engine. The client in Singapore repaired the crankshaft of a Yanmar engine. Both clients avoided heavy losses by using our onsite crankshaft grinding machine. We strongly recommend using this machine, as upcoming times will be more challenging. It may not be possible to deploy technicians with machines for crankshaft repair on short notice.

Worldwide Services:

We are executing crankshaft grinding repair services in Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, the United Arab Emirates, Vietnam, the UK, the USA, Singapore and other countries.

For more information on crankshaft grinding repair, crankshaft repair tools, onsite crankshaft grinding repair, and engine crankshaft repair equipment, contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or  +91 9810012383.

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Necessity for Onsite Crankshaft Grinding and Polishing Machine

We observe that after continuous running of the engine and crankshaft, it is important to inspect the crankshaft for the following main parameters during a major engine overhaul:

1. To check the taper and ovality of the crankpin/main journal diameter.
2. To check the surface finish of the crankpin/main journal.
3. Inspection of hardness and the presence of cracks.
4. Visual inspection for radius fillet and lubricating oil hole.

If the crankpin or main journal deviates beyond the manufacturer’s limits, operators must grind and polish the crankshaft.. Hence there is a requirement of crankshaft grinding machine which is capable of maintaining the tolerances as stipulated in the manufacturer’s manual.

Change of Technology – In situ Crankshaft Grinding & Polishing Machine

In the past, operators always used bench-type crankshaft grinding machines. They installed these machines in a workshop and had to disassemble the engine, remove the crankshaft, pack it, and transport it to the designated workshop. This process is now outdated.

Technology has changed. Portable, lightweight, and easy-to-operate in situ crankshaft grinding and polishing machines have replaced heavy-duty, expensive bench-type machines. Operators no longer need to remove the crankshaft from the engine block, as they can grind and polish the crankpin or main journal onsite. They insert the machine through the inspection window.

Main Features of Revolutionary Onsite Crankshaft Grinding and Polishing Machine

1. Excellent on-site grinding equipment replaces the outdated heavy-duty bench-type crankshaft grinding machine.
2. The onsite crankshaft grinding and polishing machine is portable and operators can easily carry it onboard a vessel, to a power plant, or any installation worldwide
3. Easy to operate and easy to maintain.
4. We designed the on-site crankshaft grinding and polishing machine to maintain close tolerances in taper, ovality, surface finish, runout, and other parameters. All meet the manufacturer’s specifications.
5. Free onsite training in our workshop is provided.

Quality Aspect of In situ Crankshaft Grinding Machine

We are an ISO-certified company. We strictly follow all quality control norms during machine manufacturing.

Main body of the machine is manufactured out of titanium steel which has the inherent quality of absorbing the vibrations. This facilitates to undertake grinding and polishing of crankshaft even while sailing of the vessel. We subject every part to stringent inspection and improve metallurgical properties over time based on field trials and reports.

RA Power Solutions prices the in situ crankshaft grinding machine affordably for shipping companies, power plants, and engine repair workshops. The cost of an in situ crankshaft grinding and polishing machine is recoverable in two or three assignments. Stop paying exorbitant prices to European companies for the repair of the crankshaft and own a machine.

RA Power Solutions created the onsite crankshaft grinding and polishing machine from forty-five years of experience in this field

We are executing crankshaft grinding repair services in Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, United Arab Emirates, Vietnam, UK, USA and other countries.

For any information on the latest technological onsite crankshaft repair machine, Crankshaft Grinding at Low cost,  crankshaft polisher machine, and onsite inspection of crankshaft, please email us at info@rapowersolutions.com, rajshahani@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

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