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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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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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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Insitu Crankshaft Grinding Machine	Onsite Crankshaft Grinder

In Olden times, the crankshaft repair was undertaken in a workshop and on a bench-type crankshaft grinding machine. The customer had no option, but to remove the crankshaft from the engine block and send it to the designated workshop for crankshaft repair purposes. The introduction of an onsite crankshaft grinding machine has made the crankshaft repairs. Simple and less time-consuming. The grinding and polishing of crankshaft is executed onsite and in assembled condition.

RA Power Solutions manufactures the latest design of crankshaft grinding machines, which are capable of undertaking the grinding of crankpin and main journal diameters up to 700 mm. This range of machine covers most of the popular make of engines and their models installed on a vessel or in industries. The onsite crankshaft grinding machine manufactured by RA Power Solutions is designed to maintain all the parameters of the crankshaft strictly, as stipulated in the Engine manufacturer manual. The ovality, Taper, surface finish, and all the major parameters are controlled during the process of repairs.

Onsite Crankshaft Grinding & Polishing Machine	onsite crankshaft grinding machine

The onsite crankshaft grinding machine is designed in such a way that it can be operated even while sailing the vessel. This saves considerable time, as there is no requirement of holding the vessel for repairs. This is of great advantage, especially, In the case of repair of the auxiliary engine crankshaft.

The cost of the machine is very low. It is highly recommended for shipping companies, and heavy industries, having multiple numbers of power generation equipment and engine repair workshops. It is estimated that the investment of an on site crankshaft grinding machine is recovered in the execution of 2-3 jobs.

We extend training to our customers on the operation and maintenance of an onsite crankshaft grinding machine. During the training, the technicians are trained on the job of grinding and polishing of crankshaft.

On-shore and Off-Shore Crankshaft Grinding Machine

For more information regarding onsite crankshaft grinding machine, grinding of crankshaft main journal, main journal crankshaft grinding service, crankshaft journal polishing and grinding, grinding of crankshaft onsite please contact us at rajshahani@rapowersolutions.com, info@rapowersolutions.com or call us at +91 9582647131, +91 9810012383.

The post ON-SITE CRANKSHAFT GRINDING MACHINE | PORTABLE | EASY TO OPERATE appeared first on Crankshaft Grinding Repair.

We also design, manufacture and supply In-Situ Crankshaft and cylindrical shaft repair machines up to 700 MM diameter.

Accessories used in Crankshaft grinding machine	Onsite Crankshaft Grinding and Polishing Machine

The main advantage of In-Situ Crankshaft/Cylindrical Shaft repair machine is that there is no requirement for removal of Crankshaft, Intermediate shaft, Pump Shaft, or any type of Cylindrical Shaft from the casing. The grinding and repairs of damage shaft is possible On-Site.

Major Highlights In-Situ Crankshaft Grinding Machine

1. The In-Situ Crankshaft grinding machine is portable and light in weight can be easily carried by technicians to the site to undertake the Crankshaft Repair.
2. Onsite Grinding and Polishing of Crankshaft is done by a single Crankshaft Grinding Machine, which is easy to operate.
3. The In situ Crankshaft Grinding Machine is capable of grinding the Crankshaft on site within close dimensional tolerance.
4. The In-Situ Crankshaft grinding Machine is of latest technology and is user-friendly.
5. We can supply the Insitu Crankshaft Grinding Machine range starting from 60 mm to 700 mm in terms of diameter

Portable Crankshaft Grinding Machine

Save Cost Of Repair By Small Investment On In-Situ Crankshaft Grinding Machine

1. Portable, lightweight crankshaft grinding machine can be taken to the site.
2. Save cost and downtime, as dismantling of crankshaft is not required.
3. Machine easy to operate, onsite training is provided.
4. Latest technology, new invention, low cost. Reduce cost of maintenance.
5. More than 77 equipment supplied worldwide.

Crankshaft Repair & Crankshaft Grinding by In-Situ Crankshaft Grinding Machine

Crankshaft Repair does not require the crankshaft to be removed from entablature. In the recent past due to seizure of bearing or development of taper, ovality, or loss of alignment of crankshaft, it was necessary to remove the crankshaft from the engine block and send it to the designated workshop for crankshaft grinding and crankshaft repair.

Manufacturer of Crankshaft Grinding Machine	Crankshaft Grinding Equipment

The introduction of a lightweight, vibration-free crankshaft grinding equipment facilitates grinding of crankshaft, crank pin, and crank main journal on the spot while the crankshaft is assembled in the engine block. There is no necessity of even decoupling the alternator and other accessories from the diesel engine.

Training In Situ Crankshaft Grinding Machine

We offer training to customer technicians in their workshop. The technicians should have basic knowledge and experience of handling common instruments like micrometer, bore gauge, and vernier caliper. The following areas are covered during the training of working on crankshaft grinding machine.

Crankshaft Grinding Machine Ready for Dispatch	Crankshaft Grinding and Polishing Machine

1. Opening, and assembly of the machine on the crankpin is shown on a dummy or actual crankshaft.
2. Operations like grinding, polishing, and giving the feed are taught.
3. Inspection of crankshaft in different stages of repair of polishing and grinding is shown to the technician.
4. Upkeep, cleaning, and maintenance of the crankshaft grinding machine is explained.

The suggested duration of training is 1 week.

Portable Crankshaft Grinding and Polishing Machine

For more information regarding Onsite Crankshaft and Cylindrical Shaft Repair Machine, in situ crankshaft grinding and repair, insitu crankshaft grinding machine, portable onsite crankshaft grinding equipment, Onsite Crankshaft Grinding and Polishing Machine, onsite crankshaft polishing machine, grinding and repair of onsite crankshaft, Cylindrical Shaft Repair please contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.

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