The standard diameter of the crankpin is only 152.00 mm, and the bearing width is 75.00 mm.

The details are as follows:

The damaged crankpin was calibrated, and excessive ovality was observed. All other parameters were found to be within limits. RA Power Solutions successfully executed the grinding and polishing of the crankpin using a portable onsite crankshaft grinding machine without removing the crankshaft from the engine block. Despite the complicated and limited inspection window opening, the repair was successfully completed; consequently, the crankpin was undersized by 2.00 mm to effectively correct the high ovality and restore proper geometry.

Onsite Crankshaft Grinding Services with Global Reach and Proven Performance

RA Power Solutions offers onsite crankshaft grinding and repair services under a wide range of conditions; whether operating on a ship at sea, at a power plant, or even at a cement plant in a remote location, the company ensures reliable and efficient solutions. As a result, this global reach ensures a quick response and, furthermore, delivers reliable solutions anywhere.Despite the complicated and limited inspection window opening, our technicians successfully completed the repair; consequently, they undersized the crankpin by 2.00 mm to effectively correct the high ovality and restore proper geometry. Furthermore, RA Power Solutions guarantees that its crankshaft grinding services ensure satisfactory performance of the crankshaft and diesel engine after repairs.

Global Expertise in Locomotive Engine Crankshaft Repair Services

With the ability to deploy skilled technicians worldwide, crankshaft repair services are available across multiple industries, including railways, marine, and power plants. As a result, this global reach ensures a quick response and, furthermore, delivers reliable solutions anywhere.

Moreover, our advanced in-situ crankshaft grinding offers significant advantages, including reduced repair time, substantial cost savings, and the complete elimination of engine removal. As a result, this technique enables efficient onsite repairs while consistently maintaining OEM standards.

For more information on onsite crankshaft repair, grinding of crankshaft, and crankshaft polishing, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

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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

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

RA Power Solutions was approached by a leading shipping company based in Indonesia after damage was reported to the crankshaft of their main engine. At the time of reporting, the vessel was anchored at Batam Port, Indonesia, and an urgent on-site repair solution was required to minimize downtime.

Damaged Crankpin of RUSTON 12RKCZ Main Engine	Damaged Crankpin Having Line Marks of RUSTON 12RKCZ

RUSTON 12RKCZ Crankpin #03 having line marks	RUSTON 12RKCZ Damaged Crankpin Line Marks

Action Taken by RA Power Solutions to Repair RUSTON 12RKCZ Crankshaft

(a) Our experienced technicians mobilized with portable onsite crankshaft grinding and polishing equipment, along with calibrated measuring instruments and consumables. The team boarded the vessel and conducted a detailed inspection of the damaged crankshaft of the Ruston 12RKCZ engine.

The details of the engine and crankshaft are pasted below:

Inspection of Crankshaft of RUSTON 12RKCZ	Hardness Test of Damaged Crankpin of Engine RUSTON 12RKCZ

(b) On inspection, the crankpins no. #1, #2, #3 and #6 were found to be damaged, and the remaining two crankpins, #4 and #5, had minor bearing line marks

(c) All major parameters, like crack detection by MPI, hardness test, and other inspection procedures, were followed.

(d) In the MPI test, surface cracks were observed on a seriously damaged crankpin. Even the hardness observed was on the higher side.

(e) The grinding of four crankpins was executed, and two crankpins were polished. The final dimensions of crankshaft machining were maintained as follows:

MPI Test of RUSTON 12RKCZ Engine Crankshaft	Magnetic Particle Inspection Test of RUSTON 12RKCZ Engine for Crack Detection

(f) After completing the machining process, the client arranged for undersized crankpin bearings from a UK-based manufacturer, which were subsequently installed.

Onsite MPI Inspection Ongoing	MPI of Crankpin of RUSTON 12RKCZ

The following undersized bearings were used:

Onsite crankpin of RUSTON 12RKCZ Repaired

Worldwide Onsite Machining Services by RA Power Solutions

RA Power Solutions is a global leader in onsite crankshaft repair, grinding, and polishing services, with over 45 years of experience. We execute onsite machining jobs for marine, power plant, and industrial engines worldwide, including locations across Asia, the Middle East, Europe, Africa, and the Americas. Our ability to mobilize skilled technicians with advanced portable equipment enables us to perform critical engine repairs anywhere in the world, minimizing downtime and eliminating the need for crankshaft removal.

With decades of hands-on experience and a presence across power plants, marine engines, oil & gas, and heavy industries, the company is widely trusted for onsite crankshaft grinding services that eliminate costly dismantling and downtime. Using state-of-the-art portable grinding machines, laser-based alignment systems, and highly skilled engineers, R A Power Solution ensures micron-level accuracy, superior surface finish, and extended engine life—right at the customer’s site.

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

The post Onsite Machining of RUSTON 12RKCZ Engine in Indonesia appeared first on Crankshaft Grinding Repair.

Deputation of RA Power Solution technicians to Suez Port:

RA Power Solutions deputed two technicians, along with an onsite crankshaft grinding machine and necessary measuring instruments, to Suez Port, where they boarded the vessel. The inspection of crankshaft was conducted as per the RA Power Solutions protocol.

The following are the main observations:

(i) On the visual inspection of the crankpins, it was observed that all seven crankpins were damaged. The bearing material was embedded on a few of the crankpins. The deep bearing line marks and rough surface are also observed.

(ii) The hardness of the crankpin was taken, and no abnormality was observed.

(iii) The crack detection of all seven crankpins was undertaken by the MPI method, and no crack was observed.

(iv) On dimensional inspection of the crankpins, orality in the range of 0.10 mm to 0.26 mm was observed in the case of six crankpins. In the remaining one, a crankpin ovality of 1.40 mm was observed.

The standard details of the crankshaft are as follows:

Action taken by RA Power Solutions for the successful repair of MAN B&W crankshaft:

(i) Six numbers of crankpins were undersized by 0.5 mm.

(ii) One number of crankpins was undersized by 2.0 mm.

(iii) We strictly maintained all parameters as per the manufacturer’s requirements and the maintenance manual.

Global Onsite Crankshaft Grinding & Crankpin Repair Services

RA Power Solutions is a leading global provider of onsite crankshaft grinding, crankpin repair, and journal machining for marine and industrial engines. With 45+ years of experience, we deliver fast, reliable, and cost-effective crankshaft repair services anywhere in the world—directly onboard your vessel or at your power plant.

Our engineers travel worldwide to execute in situ crankshaft grinding, eliminating downtime and avoiding the costly replacement of damaged crankshafts.

We have successfully completed repair projects in:

Egypt, UAE, Saudi Arabia, Qatar, Oman, Kuwait, Singapore, Malaysia, Indonesia, Turkey, Greece, Bangladesh, Sri Lanka, Azerbaijan, Nigeria, Ghana, and multiple West African regions.

We specialize in restoring crankshafts for major engine brands and models, including:

• MAN B&W: 7L23/30H, 5L23/30, 6L23/30, 6L21/31, 6S35MC, 7S50MC
• MAK: 6M20, 8M20, 6M32, 8M32, 8CM32C
• Daihatsu: 6DK-20, 5DK-20, 6DE-18
• Wartsila: Vasa 12V32LN, 6L32, 9L20
• Caterpillar: G3616, 3508, 3516
• Yanmar: EY18, EY22, 6N165

Using portable, advanced onsite machining tools, we undertake:

• Crankpin grinding & undersize machining
• Main journal grinding
• Ovality & taper correction
• Crack detection (MPI)
• Hardness testing & dimensional inspection

Whether your ship is docked or sailing, we deliver OEM-standard accuracy, restore the crankshaft quickly, and minimize your downtime.

RA Power Solutions continues to be the preferred choice for in place machining and grinding and global crankshaft grinding services, trusted by shipping companies, offshore operators, and power plants worldwide.

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

The post In place Crankshaft Machining And Grinding of MAN B&W Engine Model 7L23/30H appeared first on Crankshaft Grinding Repair.

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.

The post In Place Crankshaft Machining and Grinding of MAK-1 8CM32C Engine In Burkina Faso , West Africa appeared first on Crankshaft Grinding Repair.