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

The post MAK 6M20 Crankshaft Repair in Baku, Azerbaijan appeared first on Crankshaft Grinding Repair.

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.

The post On Site Crankshaft Repair – A Smarter Solution for Engine Maintenance appeared first on Crankshaft Grinding Repair.

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.

The post MAN B&W 18V23L-V0 Crankshaft Repair in Zanzibar, Tanzania appeared first on Crankshaft Grinding Repair.

RA Power Solutions was approached and deputed our two technicians along with onsite crankshaft grinding equipment. The vessel was anchored at MIP Mersin, Turkey.

Following are the major Engine and Crankpin details:

HIMSEN HYUNDAI 6H 17/28 CR Pin Having Hairline Crack

Main Observations of Crankshaft of HIMSEN HYUNDAI 6H 17/28

i) On visual inspection, it was found that it was a case of lubricating oil pump failure, damaging the bearings of all connecting rods.

ii) The bearing material was found embedded on all six (6) crankpins and was carefully removed. After polishing the crankpins, the dimensional inspection was conducted. The taper, ovality ranging from 0.22 MM to 0.86 was observed.

CR Pin Hardness Inspection	CR Pin of HIMSEN HYUNDAI 6H 17/28 Before Repair

The Dimensional Inspection Report of Six (6) Number Crankpins of HIMSEN HYUNDAI 6H 17/28:

iii) The hardness was checked and was found within limits, except for a few spots, which were found not harmful to the crankshaft.

iv) The crankpins were subject to a MPI test for crack detection and minor hairline cracks were observed, All other parameters were found within the limit.

Crank Pin Before Repair	HIMSEN HYUNDAI 6H 17/28 After Grinding And Polishing

Action Taken By RA Power Solutions Technicians For Damaged Crankpins:

i) The grinding of all six (6) crankpins was undertaken by our insitu crankshaft grinding machine.

ii) Three (3) number of crankpins diameter was reduced by 1.00 MM and the final size was maintained as 174.00 MM.

iii) Three (3) number of crankpins diameter was reduced by 1.50 MM and the final size was maintained at 173.50 MM.

Final Report After Grinding is Pasted Below:

The tolerance of all six (6) number crankpins was maintained with 0.02 MM.

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 and can be deputed at 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, onsite insitu crankshaft repair, crankshaft grinding and repair, grinding of onsite crankshaft repair, insitu crankshaft grinding repair, grinding of crankshaft onsite please contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.

The post HIMSEN HYUNDAI 6H 17/28 Crankshaft Repair In Turkey appeared first on Crankshaft Grinding Repair.

The major technical details of the crankshaft of Yanmar 6N165 are as follows:

Our technicians boarded the vessel and came to know that two local companies were engaged by the vessel owner to undertake the grinding of one number crankpin which was damaged. Both companies due to the non-availability of necessary tooling further damaged the crankpin and were not able to undertake the crankpin grinding.

The expertise of RA Power Solutions in the repair of small diameter and small crankpin width crankshaft

As mentioned above the crankpin diameter of Yanmar Engine 6N165 is 125 mm and the crankpin bearing width is only 48 mm, in order to undertake the grinding of a crankpin having such a small crankpin width a very compact crankshaft grinding tool is required which no other company in the world posses.

RA Power Solutions with forty-four years of experience in the field of crankshaft repair has developed a compact and dedicated tooling that is inserted from the inspection window and is placed on the crankpin with the latest technology and process followed by us.  The crank pin grinding is executed. In this case, since the crankpin was badly damaged by the local grinding company engaged by the vessel owner, we had no option but to undertake grinding to 4.0 mm undersize. The bearing was supplied by RA Power Solutions and the engine is performing satisfactorily.

Following engines, crankshaft with small crankpin diameter and bearing width can be successfully repaired onsite.

We have been regularly executing on site crankshaft repairs and crankshaft grinding in Iraq, Iran, Dubai, Oman, Saudi Arabia, Qatar, Abu Dhabi, Sharjah, Ajman, Umm Al-Quwain, Fujairah, Bahrain, Kuwait, Antigua and Barbuda, Belize, Dominica, Dominican Republic, Malaysia, Indonesia, Madagascar, Vietnam, Grenada, Guyana, Haiti, Jamaica, Saint Kitts and Nevis, Saint Lucia, South Korea, Saint Vincent and the Grenadines, Trinidad, and Tobago, etc.

For more details on the Crankshaft Repair of Yanmar Engine and supply of bearings, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

The post Crankshaft Repair Of Yanmar Engine 6N165 On Board A Vessel | Experience Of 44 Years appeared first on Crankshaft Grinding Repair.

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

On inspection of the crankshaft it was observed that one number crankpin developed excessive ovality of 0.59 mm and bearing line marks were observed. All other crankpin dimensions were checked and found within limits.

The one-number crankpin grinding was undertaken by RA Power Solutions technicians with a patented portable on site crankshaft grinding and polishing equipment carried by them & crankpin was undersize by 1.0 mm, maintaining the final dimensions of crankpin of MAN B&W 5L 16/24 as 129.00 mm and have saved the crankshaft of MAN B&W from rejection.

Our client, a leading shipping company based in Hong Kong, invited two companies to repair the crankshaft of MAN B&W 5L 16/24 from Singapore. The companies could not undertake the repairs as the grinding of the crankpin having a small crankpin width of only 58.50 mm required compact and special tooling which can be accommodated in a small crankpin width dimension. The removal of the crankshaft and sending it to the workshop was suggested to the client, which was not possible.

RA Power Solutions by undertaking the onsite grinding of crankpin saved the crankshaft from rejection and the vessel sailed within 9 hours of boarding a vessel by our technicians in Trincomalee port, Sri Lanka.

Availability of Undersize Bearings with RA Power Solutions:

RA Power Solutions deputed the technicians with 0.5 mm and 1.0 mm undersize bearings and after grinding 1.0 mm bearing was assembled and the engine was put back in operation.

A great saving by the ship owner with a cost-effective solution given by RA Power Solutions.

RA Power Solutions is ISO 9001:2015 (Quality Management System) & ISO 14001:2015 (Environmental Management System) certified approved company.

We have been regularly executing on site crankshaft repairs and crankshaft grinding in Dubai, Oman, Saudi Arabia, Qatar, Abu Dhabi, Sharjah, Ajman, Umm Al-Quwain, and Fujairah, Bahrain, Kuwait, Iraq, Antigua and Barbuda, Belize, Dominica, Dominican Republic, Grenada, Guyana, Haiti, Jamaica, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Trinidad, and Tobago, etc.

For more details on the repair of the engine, crankshaft repair on the vessel, crankshaft polishing on vessel, or onboard crankshaft repair, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

The post MAN B&W 5L 16/24 Crankshaft Repair on Vessel | Save Crankshaft from Rejection appeared first on Crankshaft Grinding Repair.