Key Features of the Crankshaft Grinding Machine

1. Portable & Modular Engineering

The machine’s lightweight and modular construction enables quick transportation, assembly, and operation directly at site locations—including confined engine rooms, vessels, offshore platforms, and remote industrial facilities.

2. Wide Grinding Range

With the capability to machine crankshafts from 35 mm to 700+ mm, it supports a broad spectrum of engines used in marine propulsion, diesel power plants, industrial equipment, and heavy machinery.

3. Advanced Vibration-Control Technology

Manufactured using specially developed vibration-dampening alloys, the machine ensures exceptional stability during operation. This directly contributes to a superior surface finish and precision, even in the most demanding environments.

4. Micron-Level Accuracy

The machine restores crankpins and main journals to original OEM tolerances. Ovality, taper, and size corrections are executed with high precision, ensuring long-term reliability and smooth engine functioning.

5. Combined Grinding & Polishing System

Grinding and polishing are performed in the same setup without disturbing the alignment. This integrated design saves significant time while delivering consistent journal geometry.

6. Rapid Setup & Alignment

Special fixtures and alignment tools allow the machine to be mounted quickly with perfect axial positioning. This is particularly critical in constrained spaces, as it reduces the overall repair duration.

7. Exceptional Surface Finish

The machine delivers a mirror-like surface suitable for high-speed and high-load-bearing applications, improving lubrication and extending crankshaft life.

How the Machine Operates

(i) Mounting & Fixture Alignment

Custom brackets are used for precise mounting on the crankshaft.

(ii) Measurement & Diagnosis

Dial gauges and micrometers record journal wear, taper, and ovality.

(iii) High-Precision Grinding

Controlled grinding restores the exact journal size and geometry.

(iv) Polishing

The same machine produces a smooth, bearing-ready finish.

(v) Final Inspection

Journal dimensions are rechecked to confirm OEM tolerance compliance.

Operational Advantages

Minimal Downtime

Repairs are completed onsite, significantly reducing engine outage time.

Major Cost Savings

Eliminates logistics, crane usage, transportation, and external workshop costs.

Extends Engine Life

Accurate restoration ensures long-term durability and prevents premature engine failure.

Ideal for Any Environment

Marine vessels, offshore rigs, industrial plants, and remote installations benefit from its portability and precision.

RA Power Solutions: Global Leader in Crankshaft Grinding Technology

RA Power Solutions Pvt. Ltd. is the designer, manufacturer, and worldwide supplier of the advanced Onsite Crankshaft Grinding Machine. With over four decades of experience in engine repair and rotating machinery services, the company has become a trusted name across the marine, industrial, and power sectors.

Why RA Power Solutions Stands Out

1. In-House Design & Manufacturing

The Crankshaft Grinding Machine is designed and built entirely by RA Power Solutions, ensuring:

• superior metallurgy

• vibration-free performance

• long operational life

• precise grinding accuracy

2. Global Onsite Service Expertise

Their team has performed 10,000+ onsite crankshaft grinding and repair jobs across more than 90 countries, giving them unparalleled field experience.

3. Continuous Innovation

The machines are regularly upgraded based on real-world feedback from:

• marine engineers

• power plant operators

• industrial maintenance teams

Each new generation offers improved efficiency, portability, and accuracy.

4. End-to-End Support

RA Power Solutions provides:

• machine supply

• operator training

• spare parts

• onsite grinding services

• technical consultancy

5. Proven Track Record

Widely used in:

• marine main engines (MAK, MAN, Wärtsilä, Yanmar, etc.)

• diesel generator sets

• cement and steel plants

• petrochemical facilities

• offshore platforms

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Quality Standards : RA Power Solutions

The onsite crankshaft grinding executed successfully, meeting all technical and quality standards. As part of our quality assurance process, inspection reports are obtained and duly signed by the vessel’s Chief Engineers. These reports are available upon request and can be shared along with photographs and videos.

Our team is available 24/7 and can mobilize at short notice to any location worldwide. We are committed to minimizing downtime and ensuring smooth and reliable operation of your engines.

Assembly of Crankshaft Grinding Machine on Damaged Crankpin	Onsite Crankshaft Grinding Under Process

RA Power Solutions offers specialized onsite services:

RA Power Solutions has been a world leader in onsite crankshaft grinding and polishing for more than 45 years, serving power plants, shipyards, marine vessels, and engineering sectors globally. We can do insitu crankshaft grinding for diameters up to 700 mm with unparalleled accuracy and efficiency because we have experience with engines of all makes and models.

Serving engines such as MAN B&W 7L23/30H, Daihatsu 6DK20, Hyundai Himsen 9H25/33P, and Bergen Rolls-Royce, among others, our recent projects span important international ports and clients from Sharjah, Dubai, Vietnam, and beyond.

For more details of the onsite crankshaft repair, Crankshaft Grinding Services, In Situ Crankshaft Grinding Machine, or email us at info@rapowersolutions.com or call us at +91-9582647131,+91 9810012383.

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The onsite crankshaft grinding machines are portable, light in weight, and have the following main features:

 The features of the portable onsite crankshaft grinding machine are given as follows:

1. RA Power Solutions Pvt. Ltd. designed, manufactured, and exported the machine worldwide.. We are proud to be the only manufacturer in the world producing centerless, portable, onsite crankshaft grinding machines. Please be aware of counterfeit machines and unauthorized imitations of our products.
2. We have already delivered more than 80 units across the globe. Engine repair workshops, shipping repair companies, diesel-based power plants, and leading onsite crankshaft grinding companies use them.
3. The current machine range of onsite crankshaft grinding machines is from 60–700 mm in terms of the diameter of crankshaft.
4. With our experience of over 45 years in this field, we have been improving the design and metallurgical composition of the parts to make the onsite crankshaft grinding machine light in weight, more efficient, and to improve the overall quality of grinding and polishing of crankshafts.
5. The machine is compact and lightweight. You can carry it as checked-in baggage during travel. This eliminates the need to book the equipment separately in a cargo flight.
6. The machine is operated by a heavy-duty pneumatic turbine motor. Hence, there is no hassle related to voltage variations, frequency fluctuations, or compatibility issues.
7. The machine is supplied as a complete unit, including all accessories. It is ready to operate immediately upon arrival.
8. We offer free training by our senior service engineer at the customer site or at our dedicated training school based near New Delhi.
9. The cost of the machine is affordable and makes it a financially viable option even for crankshaft and engine repair companies.

About RA Power Solutions:

We are a global leader in onsite crankshaft grinding and repair services for crankpins and main journals up to 700 mm. With over four decades of hands-on experience, we are Asia’s most established and trusted company in this field.

We are the original developers and manufacturers of portable onsite crankshaft grinding machines. Our machine design originates from a reputed Italian engineering firm. To date, we have supplied over 80 onsite crankshaft grinding machines across the globe.

In addition to repair services, we also supply the complete range of tools and measuring instruments necessary for crankshaft repairs.

We offer hands-on training programs for client technicians at our in-house training center near New Delhi, India, conducted by our expert engineers. We successfully delivered training sessions to clients from Colombia, Panama, Ecuador, Dubai, Singapore, Bangladesh, Tanzania, and many other countries.

For more details on the onsite crankshaft repair, Crankshaft Grinding Services, or In Situ Crankshaft Grinding, email us at info@rapowersolutions.com, Call at +91-9582647131,+91 9810012383.

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RA Power Solutions introduced mobile in situ machining services to cut repair costs and save time by avoiding disassembly, removal, and transport of shafts to workshops. We machine all types of cylindrical shafts and crankshafts up to 700 mm in diameter. We maintain tolerances according to the manufacturer’s requirements.

Advantages of Mobile Machining of Cylindrical Shaft and Crankshaft Onsite:

1. We use advanced technology and processes for the machining of cylindrical shafts and crankshafts.
2. Onsite machining equipment is portable and can be taken all over the world by our technicians.
3. Customization of onsite machining tools is possible according to the specifications of the shaft and site requirements.
4. Crankshaft Grinding Mobile Services machining minimizes the downtime and cost of the repairs.
5. Mobile machining is of great advantage to the plants as we are available 24*7 and can fly to any part of the world on short notice.
6. All our technicians experienced and trained in our in-house training school.
7. We have 45 years of experience. We regularly provide mobile machining services to leading companies across the world.
8. We design mobile machining equipment to undertake machining of damaged crankshafts in main and auxiliary engines installed on vessels.
9. Mobile machining is also possible while sailing of the vessel.

For more information regarding crankshaft machining, cylindrical shaft machining, and Crankshaft Grinding Mobile Services, please contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.

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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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Crankpin Machining is Required in Case of the Following Damage to the Crankpin

1. Development of excessive taper & ovality on a crankpin.Seizure of crankpin bearingDevelopment of bearing marks and pitting on crankpin.
2. Development of excessive taper & ovality on a Crankpin diameter.
3. Seizure of crankpin bearing.
4. Development of bearing marks and pitting on the crankpin.
5. Due to the above defects, it is necessary to get the Crankpin Machining undertaken.

RA Power Solutions Pvt. Ltd, an easy-to-operate and do-it-yourself crankshaft polishing machine manufacturer, up to 700 mm in diameter.

Reason for periodical polishing of crankpin and main journal:-

1. Leading manufacturers like Wartsila, Daihatsu, Mirrlees Blackstone, Yanmar, Allen, MAK, MAN, B&W, Sulzer, and Caterpillar design their engines with close tolerances in the crank pin and main journal.

2. Generally, the tolerance ranges between 0.02 mm to 0.05 mm.
3. We highly recommend polishing the crankpin and main journal diameters periodically. This process removes line marks and pitting from the journals.
4. Crankshaft polishing improves the surface finish and enhances the life of bearing manifolds.

5. Proper maintenance and precision machining greatly reduce the chances of serious crankshaft accidents or bearing seizure incidents.

6. The high surface finish of the crankpin and main journal after polishing can produce more power, durability, and long-lasting performance of the Engine.
7. The crankshaft polishing results in less noise, vibrations, and friction, and consumes less fuel.
8. Lower emissions are produced.

Due to the above and many other reasons, it is highly recommended to undertake the polishing of the crankpin and main journal periodically at the time of major overhauling or replacement of bearings.

RA Power Solutions Pvt. Ltd. manufactures, for the last forty-five years, revolutionary equipment for the onsite polishing of crankpins without removing the crankshaft from the engine block. The crankshaft polishing machine is manufactured in the range starting from 35 mm to 700 mm in terms of diameter.

RA  Power Solutions has the following features:-

1. The technician inserts the crankshaft polishing machine through the engine block inspection window. It sits directly on the crankpin diameter.
2. There is no requirement for the removal of the crankshaft from the block.
3. The machine supplied in two versions: electrical and pneumatic. This depends on the availability of the facilities on board the vessel or in any industry.
4. Machine is easy to operate, and can reduce the taper and ovality. To improve the surface finish to far better than the international standards.
5. Any technician can easily operate the crankshaft polishing machine. The machine allows them to perform polishing efficiently.

Stop spending high amounts on polishing of crankshaft by calling the specialized companies. It reduces the cost of maintenance by increasing the life of bearings and crankshafts.

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

For more information on  Onsite Crankshaft Polishing, crankshaft polishing machine manufacturers, polishing crank journals, crankshaft grinding and polishing, or cylindrical shaft grinding machine. Contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131.

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Using onsite portable equipment, technicians can easily remove bearing line marks and pitting. They also ensure the work meets the manufacturer’s specifications.

We have sold more than 70 onsite crankshaft grinding machines to various countries like Nigeria, Greece, Singapore, Indonesia, Philippines, South America, Italy, Dubai, Vietnam,U.K, UAE , Singapore etc. We also extend training to the customers for operation and maintenance of the crankshaft grinder.

The cost of onsite crankshaft grinder machine is kept low, as it is our objective that no one should spend large amounts of money on polishing and grinding of crankshaft.

For any technical information or quotation of onsite crankshaft grinding machine, crankshaft grinding machine manufacture, portable onsite crankshaft grinding machine and crankshaft grinder we are just an email away from you. Please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or  +91 9810012383 and save your crankshaft from rejection.

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