The major crankshaft details of the MAN B&W 5L 16/24 are as follows:

In the case of the MAN B&W 5L 16/24 crankshaft, the crankpin diameter is relatively small at 130.00 mm, with a bearing width of only 56.00 mm. To facilitate onsite crankshaft grinding of the crankpin, RA Power Solutions has designed and developed a dedicated onsite crankshaft grinding machine. This machine can be inserted through the inspection window, allowing grinding to be carried out efficiently.

RA Power Solutions deputed technicians, along with equipment, and the following actions were taken:

i) Excessive ovality of 0.97 mm was observed on crankpin No. 03 of the auxiliary engine. Line marks were also noted.
ii) All other parameters, such as hardness, MPI (for crack detection), and visual inspection, were checked and found to be within limits.

iii) Grinding of crankpin No. 03 was carried out, and the diameter was maintained at 128.50 mm (undersized by 1.50 mm).

Advantages of Engaging RA Power Solutions for Repair of Crankshaft – MAN B&W 5L 16/24

i) As a designer and manufacturer of onsite crankshaft grinding machines, we undertake modifications to the equipment, if required, to ensure the successful repair of the crankshaft.

ii) In this case, since the crankpin diameter is only 130.00 mm and the bearing width is 56.00 mm, we developed equipment capable of both grinding and polishing.

iii) We maintain a stock of bearings for popular engine makes and models, including undersized and special sizes. In this case, the required bearings were carried by our technicians, and the engine was commissioned immediately after the crankshaft repair.

Availability of Undersized Crankpin Bearings in Stock of MAN B&W Engine Model No. 5L 16/24

RA Power Solutions has consistently dedicated itself to delivering exceptional and prompt service. With over 46 years of experience, we have successfully repaired more than 10,000 crankshafts worldwide.

We have been regularly providing our services in South Africa, Nigeria, Cambodia, Tanzania, Brazil, Canada, Australia, Bangladesh, Greece, Haiti, Hong Kong, Indonesia, Kenya, Malaysia, Maldives, Kenya, Kuwait, Madagascar, Mexico, Nigeria, Oman, Philippines, Saint Lucia, Saudi Arabia, Singapore, Spain, Sint Maarten, Sri Lanka, Suriname, Thailand, Togo, United Kingdom, United States, Yemen, Zambia, etc.

For more information regarding crankshaft grinding 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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The non-operation of two auxiliary engines stranded the vessel. Considering the urgency of the situation, RA Power Solutions deputed two technicians along with a specially designed onsite crankshaft grinding machine capable of grinding crankpins with small diameters and narrow widths.

In the case of the MAK 6M20 auxiliary engine, the standard diameter of the crankpin is only 152.00 mm, with a bearing width of 71 mm. The design of our onsite crankshaft grinding machine is such that it can be mounted on the crankpin diameter through the inspection window, and grinding is executed in situ.

The details of the engine are as follows:

Upon arrival on board the vessel, our technicians conducted an initial inspection of all crankpins. They found excessive ovality in all six crankpins of the MAK 6M20 engine.

We have provided a copy of the preliminary dimensional inspection report below.

All other parameters, including hardness, MPI, and deflection, were within acceptable limits. We jointly decided to grind all the crankpins, and RA Power Solutions machined them to a final size of 151.00 mm (1.00 mm undersize) as per the above dimensions.

During the stay of our technicians on board the vessel, the crankshaft of Auxiliary Engine #02 was also inspected. We detected excessive ovality showing the same pattern observed in the crankshaft of Auxiliary Engine 01.

The preliminary dimensional inspection report is provided below:

SIZE OF CR Pins Before Grinding of A/E 02
	A	Aa	C	Cc	B	Bb	Min	STD	Ovality
CR-1	151.73	151.85	151.74	151.84	151.75	151.82	151.73	152.00	0.27 MM
CR-2	151.73	151.85	151.72	151.83	151.70	151.81	151.7	152.00	0.30 MM
CR-3	151.72	151.85	151.71	151.84	151.69	151.83	151.69	152.00	0.31 MM
CR-4	151.75	151.85	151.72	151.84	151.73	151.86	151.72	152.00	0.28 MM
CR-5	151.73	151.84	151.69	151.82	151.70	151.84	151.69	152.00	0.31 MM
CR-6	151.73	151.92	151.72	151.89	151.75	151.84	151.72	152.00	0.28 MM

Our technicians ground this crankshaft and maintained the following dimensions. They successfully commissioned both engines in their presence.

SIZE OF CR Pins After Grinding A/E 02
	A	Aa	C	Cc	B	Bb	Min	Max	Ovality
CR-1	151.00	150.99	150.99	150.98	150.99	151	150.98	151.00	0.02 MM
CR-2	151.00	150.99	150.99	150.98	151.00	150.98	150.98	151.00 0.02 MM	0.02 MM
CR-3	151.00	150.99	150.98	150.98	150.99	151.00	150.98	151.00	0.02 MM
CR-4	151.00	150.99	150.98	150.99	150.99	151.00	150.98	151.00	0.02 MM
CR-5	151.00	150.99	150.98	150.98	150.99	151.00	150.98	151.00	0.02 MM
CR-6	151.00	150.99	150.98	150.98	150.99	151.00	150.98	151.00	0.02 MM

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We have developed a revolutionized tooling which has the capabilities to execute the repairs to close tolerances as stipulated in the engine manufacturer’s manual.

Case Study of Repair of MAK-1 8CM32C Engine Crankshaft In Burkina Faso, West Africa

The major details of the crankshaft of the MAK-1 8CM32C Engine are as follows:

i) Due to the repeated failure of bearings, it was decided by the client to get an audit of the crankshaft for all the major parameters. RA Power Solutions deputed two (2) technicians along with the onsite crankshaft grinding machine from New Delhi to Burkina Faso. During the initial inspection, the following was checked and observed.

a) The dimensional inspection of the crankpins was conducted, and excessive ovality was observed in all the crankpins. The readings for all the crankpins are pasted below:

b) As protocol, all the crankpins were checked for hardness by a portable hardness tester and were found within limits.

c) MPI was also undertaken to check the cracks, and no abnormality was observed.

ii) The grinding of all the eight (8) crankpins was executed onsite by our technicians. The first step size and tolerance of 0.02/0.03 MM were maintained.

In Place Machining of Crankshaft of MAK-1 8CM32C Engine

RA Power Solutions has been successfully executing the repair of high-diameter crankshafts up to 700 mm. We also specialize in onsite grinding of small-diameter crankpins with a bearing width of the crankpin as low as 50 mm to execute onsite such types of complex crankshaft repairs onsite. We have developed special-purpose onsite crankshaft machining equipment by which the repairs can be executed. We execute repairs for Marine, industrial, stationary power, and offshore sectors all over the world.

Our technicians are available to travel worldwide on short notice. Additionally, several of our technicians hold valid US visas, enabling them to travel to South America, the Caribbean, and other destinations as needed.

At RA Power Solutions, we provide specialized crankshaft grinding machines, onsite crankshaft grinding repair, insitu crankshaft grinding, Onsite crankshaft grinding machines,  insitu crankshaft grinding machines, crankpin bearings, metal stitching, metal locking, engine block repair, crack repair by metal stitching, cast iron crack repair, crankpin polishing, inspection of crankshaft, crankshaft inspection, rebabbitting bearing, babbitt white metal, engine overhauling, grinding of crankpin, connecting rod, and turbine shaft bearing services worldwide, including South Africa, Singapore, Greece, Dubai, Iraq, Iran, Malaysia, Colombia, and Brazil.

For more information regarding crankshaft grinding 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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Efficient Repairs, Delivered On Site

On site crankshaft repair eliminates the need to dismantle and ship large engine components. Instead, skilled technicians bring precision tools and advanced equipment directly to your location. Whether on a vessel at sea, an offshore platform, or a remote industrial plant, repairs are carried out in situ with the same accuracy as workshop-based service. This significantly reduces engine downtime and associated logistics costs.

Common crankshaft issues such as journal wear, scoring, taper, ovality, cracks, or bearing damage can now be rectified on site. By machining and grinding crankpins or main journals without removing the crankshaft, repairs can be completed in a fraction of the time. The portable equipment used is engineered to deliver high-precision results, often within tolerances of a few microns. Once the machining is done, final checks like hardness testing, alignment inspection, and surface finish measurement ensure the crankshaft is restored to OEM standards.

Why Choose RA Power Solutions for On Site Crankshaft Repair?

RA Power Solutions is a well-known name in the field of in situ engine repairs, with decades of expertise providing high-quality crankshaft services globally. To achieve consistent, long-lasting results, our expert specialists use cutting-edge equipment and strictly adhere to quality control protocols. We specialize in doing on site crankshaft repair swiftly and efficiently, saving downtime while keeping high-quality standards.

This approach not only saves time and money but also extends the life of engine components. It reduces the need for expensive replacements. RA Power Solutions is committed to helping clients operate without disruption. Whether it’s for a commercial ship, power plant, or critical industrial machinery.

If your engine is showing signs of crankshaft damage—such as unusual noise, vibration, or performance loss—don’t wait. We offer immediate response and tailored repair services across the globe. Trust RA Power Solutions to bring world-class service to your site.

For more details of the On Site Crankshaft Repair, Crankshaft Grinding Services, In Situ Crankshaft Grinding, or email us at info@rapowersolutions.com, Call at +91-9582647131,+91 9810012383.

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We recently completed a successful onsite repair of a BERGEN B32:40L8P engine crankshaft onboard a vessel in Jamaica.

The details of the job are as follows:

Onsite Inspection of Crankshaft – BERGEN B32:40L8P

• Two of our experienced technicians, along with our portable onsite crankshaft grinding equipment, traveled from New Delhi, India, to Jamaica.
• Our equipment is lightweight, compact, and portable, allowing it to be transported as accompanied baggage, which eliminates delays associated with cargo shipment and customs clearance.
• Upon boarding, the vessel was found fully loaded with containers, yet our team immediately initiated the crankshaft inspection.
• It was observed that Crankpin No. 5 had suffered severe damage due to a bearing failure.
• The crankpin was thoroughly cleaned, and embedded bearing material was carefully removed.
• Dimensional checks revealed:
  • Minimum Diameter: 269.75 mm
  • Maximum Diameter: 270.00 mm
  • Ovality: 0.25 mm
  • Deep scoring marks were also noted due to the bearing failure.
• A Magnetic Particle Inspection (MPI) using a high-intensity Magnaflux torch was conducted to check for cracks. No cracks or abnormalities were detected.
• Hardness testing was performed, and confirmed that values remained within permissible limits.

Onsite Grinding of BERGEN Crankpin

• The crankpin was calibrated and ground in multiple stages, with ovality strictly controlled during the process.
• Due to deep scoring, the crankpin had to be ground to an undersize of 2 mm.
• The final dimension achieved was 268.00 mm – 0.02 mm, ensuring precision and compliance with engine requirements.

Engine Commissioning

• The vessel had a 2 mm undersize bearing in stock, which was installed immediately after grinding.
• A trial run of the engine was conducted in the presence of our technicians, and performance was found to be fully satisfactory.

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 in New Delhi, India, conducted by our expert engineers. Our training sessions have been successfully delivered to clients from Colombia, Panama, Ecuador, Dubai, Singapore, Bangladesh, Tanzania, and many other countries.

For more information regarding crankshaft grinding services, Crankshaft Repair, please contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.

The post Crankshaft Repair | Onsite Crankshaft Grinding | BERGEN Engine | 45 Years Experience appeared first on Crankshaft Grinding Repair.

Action Taken By RA Power Solutions For Repair of Crankshaft Yanmar 8N 330L EV

i) Since the vessel was anchored near Panama Port, RA Power Solutions deputed two technicians having a valid US VISA and Seaman book. Both technicians flew to Panama along with onsite crankshaft grinding machine and measuring instruments and boarded the vessel within 48 hours of the client’s first information of the breakdown of crankshaft of Yanmar 8N 330L EV.

The Details of Engine / Crankpin are as following:

ii) RA Power Solutions technicians inspected all the crankpins (8 Nos) to check the taper & ovality, the dimensions of observed are pasted below.

iii) On going through the readings, it was observed that the crankpin number #02 has developed excessive ovality of 0.43 MM, against the tolerance of 260.00 MM + 0.03 MM. This is considered very much on the higher side. All other crankpins also have ovality ranging from 0.09 MM to 0.10 MM, The bearing line marks and rough surface on the crankpin were observed.

iv) As a Protocol, hardness was checked of eight (8 Nos) Crankpins and was observed within limits.

v) Crack detection was also conducted, and no crack was observed on damaged crankpin number #02 and other crankpins.

vi) It was jointly decided to undertake the grinding of crankpin number #02 and polishing the remaining crankpins to remove the bearing line marks and to improve the surface finish.

vii) Although in the crankpin numbers #01,#03,#04,#05,#06,#07, and #08 the ovality was observed on the higher side as 0.10 MM, however, this was accepted under divation.

viii) The Crankpin number #02 was undersized by 1.5 MM, A Final Dimensional Report after grinding and polishing of crankpins of Yanmar 8N 330L EV is pasted below.

ix) In order to assist ship staff, our technicians undertook the dimensional and MPI Inspection of connecting rods available on the vessel, they were observed within limits.

The engine was commissioned during the presence of our technicians on the vessel.

We have been regularly executing on site crankshaft repairs and In Situ crankshaft grinding in Dubai, Fujairah, Qatar, Saudi Arabia, Oman, Iraq, Togo, Malta, Freetown, Egypt, Malaysia, Iran, Indonesia, Vietnam, Jordan, etc.

We have a team of trained technicians available 24/7 hrs and can be deputed on short notice. Some of our technicians also have valid US VISA and can fly to South America, Caribbean countries, etc.

For more information regarding crankshaft grinding 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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