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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Crack Detection Test of Wartsila VASA Engine Model 12V32LN By MPI	Hardness Test of Wartsila VASA Engine Model 12V32LN

Main observations of the crankshaft of Wartsila Vasa are :

(I) On a visual inspection of crankpin number one, having a standard diameter of 270 mm, it was found to be damaged with deep line marks, pitting, and a rough surface.

(II) The crankpin was subjected to dimensional inspection after cleaning the embedded bearing material. The following measurements were observed for Crankpin Number One:

Minimum Diameter: 269.45 mm

Maximum Diameter: 269.89 mm

Ovality Observed: 0.55 mm

(III) All other crankpins were visually inspected, and no damage or marks were observed.

(IV) As per standard procedure, Crankpin Number One was subjected to a crack detection test using the MPI process, and hardness testing was also carried out. No abnormalities were observed

(V) Crankpin Number One was undersized by on site crankshaft grinding equipment. The diameter was reduced by 1 mm to control ovality and to remove the line marks observed after the bearing seizure. The final crankpin diameter was maintained as 269.00 – 0.02 mm.

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

RA Power Solutions, during its long-standing presence in the industry, has executed repair of over 1300 Wartsila engine crankshafts of various models. The most popular models serviced include WARTSILA 12V32 and WARTSILA 18V32, widely installed in diesel power plants around the world.

At RA Power Solutions, we specialize in on site crankshaft grinding for Wartsila, Yanmar, MAN, and MAK engines, offering a reliable and cost-effective solution to repair damaged or worn crankshafts without removing them from the engine.

This advanced service not only eliminates the need for engine disassembly and costly transportation but also significantly reduces downtime. Using state-of-the-art portable grinding equipment, our expert technicians restore the crankshaft’s dimensions and surface finish to OEM standards, ensuring optimum engine performance.

Wartsila VASA Engine Model 12V32LN Grinding Under Process	Crankpin Inspection Under Progress Before Polishing

With over four decades of experience, we’ve successfully delivered onsite crankshaft grinding services across the globe—including Burkina Faso, Bangladesh, Dubai, Indonesia, Singapore, and many other ports and shipyards worldwide. No matter where your vessel or power plant is located, RA Power Solutions is ready to respond with precision, speed, and expertise.

Get in touch with us today for expert services in onsite crankshaft repair, crankpin polishing, crankshaft reconditioning, and in-situ crankshaft grinding. Our team is equipped to provide fast and reliable solutions, wherever your engine is located. For inquiries or service requests, please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 / +91 9810012383. We’re here to support you—anytime, anywhere.

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The crankshaft and Main Journal details are as follows:

​Inspection Conducted by RA Power Solutions of Crankshaft of MAN B&W 18V23L-V0

i) On the Visual Inspection of the crankpin and main journal of the crankshaft, the damage of bearing was clearly seen; in fact, the bearing material was also found in the oil sump.

It was decided to remove the crankshaft from the engine block in order to thoroughly inspect crankpin and main journal diameter of the crankshaft. The main journal housing also required thorough inspection for any cracks, deviation in the main journal housing bore, and the alignment of the housing.

ii) The crankshaft was placed on the “V” block, the design of which was made by our technicians.

iii) The inspection in detail was conducted, including dimensional inspection report, MPI test for crack detection, Hardness test etc.

iv) While all the major parameters were observed within the limit. The crankpin Number #05, having a standard diameter of 185.00 and Main Journal Number #10, having a standard diameter of 220.00 MM, had excessive ovality, The deep line marks were also observed.

Action Taken by RA Power Solutions to Repair the Crankshaft of MAN B&W 18V23L-V0

i) The crankpin grinding was executed, the standard diameter of 185.00 was reduced by 1.5 MM, and the final diameter of 183.50 MM was maintained.

ii) The main journal diameter of 220.00 MM was reduced by 1.00 MM after grinding, and the final diameter was maintained as 219.00 MM.

iii) All the tolerance, surface finish, etc, were maintained strictly as per the manufacturer’s specifications stipulated in the manual.

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 in short notice. Some of our technicians also have a 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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The Auxiliary engine number #02 of MAN B&W 5L 16/24 was stopped due to low air pressure, two of our technicians boarded the vessel and inspected the crankshaft. All Five (5) crankpins having a standard diameter of 130.00 MM had ovality ranging from 0.10 MM to 0.40 MM, which is considered to be on the higher side. The crankpins also had bearing line marks, rough surfaces, and localized damage, as the engine was operated in spite of the problem in the crankshaft.

The dimensional Report of crankpins is pasted below:

The hardness and MPI for crack detection was conducted and no abnormality was observed. Technicians started onsite grinding of crankpins were ground ranging from 1.0 MM undersize to 1.50 MM.

The main advantage of onsite crankshaft grinding jobs executed by RA Power Solutions is that the technicians and equipment are trained and designed to execute the job even while sailing of the vessel. There was absolutely no requirement of holding of the vessel. RA Power Solutions also supplied the undersized crankpin bearings for this engine and it was commissioned in a short notice.

RA Power Solutions with experience of more than 44 years extends onsite crankshaft grinding services to leading shipping companies, power plants and heavy industries all over the world.

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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