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.

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.

The post Onsite Crankshaft Grinding Repair of MAN B&W 5L 16/24 appeared first on Crankshaft Grinding Repair.

Following inspection of the crankpin and main journal is recommended before the replacement of the crankpin and main journal bearings.

Dense, scoring, and bearing marks should be thoroughly checked. In some cases, bearing material sticking on the crankpin/main journal takes place. This needs to be checked thoroughly. Development of rough surface on crankpin and main journal diameter. RA Power Solutions Pvt Ltd. recommends crankshaft polishing to save the crankshaft from rejection.

In case any of the above-mentioned abnormalities are observed on the crankpin and main journal surface, polishing is recommended. The crankshaft journal and crankpin are required to be polished maintaining the RA value of less than 15/10 micro inch depending on the rpm of the engine and manufacturer.

The polishing of the crankpin and main journal is recommended to prevent rapid premature wear and tear of the crankshaft and to increase the life of bearings. It is strongly recommended that whenever the bearings are replaced, the crankshaft should be subject to polishing to remove the burrs, line marks and to enhance the surface finish.

In olden times, it was not possible to undertake the crankpin and main journal polishing on site due to the non-availability of technology and equipment. End users and marine engineers were reluctant to remove the crankshaft from the engine block and send it to the designated workshop which used to work out to be expensive and time-consuming. With the introduction of an onsite crankshaft polishing machine, RA Power Solutions can depute our engineers along with a crankshaft polishing machine on board a vessel or any site all over the world on short notice. The equipment is designed to maintain a far superior surface finish of 15/20 microinch which is the international standard.

Polishing Crank Journals And Main Journal Polishing Made Easy

Are you spending a huge amount still on crankpin and main journal polishing on the crankshaft and paying exorbitant rates to companies based in Europe and Singapore? RA Power Solutions Pvt. Ltd. undertakes crankpin and main journal polishing onsite up to 700 mm diameter at an internationally low price. All the parameters after crankpin and main journal polishing are maintained.

A few of the advantages of crankpin and main journal polishing are the following:

It is recommended to remove the bearing line marks and pitting from the crankpin and main journal periodically. After the continuous running of the engine, the crankpin and main journal surface become rough. This can be polished and surface finish can be maintained as per the international standards.

Crankpin and main journal polishing are recommended to remove the excessive taper and ovality in the crankpin and main journal. We can depute technicians with the portable crankpin and main journal polishing equipment and undertake the job. Alternatively, for large diesel power plants or shipping companies, it is recommended to buy the onsite crankshaft grinding machine manufactured by RA Power Solutions.

The negligible cost of crankshaft polishing

The cost of crankshaft polishing is negligible in comparison to the consequences due to the major breakdown of the crankshaft. The cost of replacing a new crankshaft and bearings is exorbitant. RA Power Solutions Pvt. Ltd. recommends availing the facilities of getting the inspection of the crankshaft and polishing done.

For more information on crankshaft grinding, crankshaft inspection procedure, crankshaft repair, crankshaft journals polishing, polishing crankshaft journals, crankshaft inspection procedure, grinding of crankshaft journal, crankpin grinding, polishing crank journals, crankshaft inspection procedure, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

The post Crankshaft Journals Polishing | Crankshaft Inspection Procedure appeared first on Crankshaft Grinding Repair.

We extend crankshaft machining for the engines installed in diesel power plants and on vessels. The onsite crankshaft grinding repair services are provided through our technicians who have experience working with engine manufacturers. All the onsite grinding and machining services extended by RA Power Solutions are guaranteed for satisfactory performance. The technical parameters and tolerance of Crankpin Journal repair are maintained as per the manufacturer’s specifications.

Over 44 Years of Crankshaft Grinding and Polishing Machining Experience

RA Power Solutions has experience of more than forty years in this field of crankshaft grinding and machining on land sites and on board sea-going vessels and off-shore anywhere in the world. We offer onsite grinding and machining of crankshafts having diameters ranging from 30 mm to 700 mm.

We are well known as one of the leading companies in the field of onsite grinding and machining of rotary shafts. Our technicians can travel to any part of the world without any hassle. Onsite crankshaft grinding and machining is getting popular nowadays as it save downtime and prices.

The onsite crankshaft grinding machine is developed by RA Power Solutions and is used for grinding, polishing, and machining of crankpin main journal, crankshaft, intermediate shaft, alternator shaft, and pump shaft onsite. By using this grinding equipment, we can save the shaft by maintaining all the parameters mentioned in the engine’s manual.

We are extending our services all over the world with a guarantee and we are known for our sincerity and low prices.

We’re Here to Help You Grow

We have been regularly executing the repairs in Madagascar, Oman, Qatar, Philippines, Bahrain, Srilanka, Bangladesh, Myanmar, Turkey, Nigeria, Greece, Saudi Arabia, UK, Dubai, Malta, Cyprus, Singapore, Malaysia, Colombia, Indonesia, Hong Kong, Spain, Netherlands, Dubai, Portugal, Estonia, Morocco, Belgium, Vietnam, Canada, Jordan, Libya, Kuwait, Egypt, Morocco, Yemen, Bahrain, Tunisia, Sudan, Oman, Algeria, UAE, Iraq, etc.

The Author of This Blog: In Their Own Words

This blog is written by Mr. Raj Shahani (Managing Director of RA Power Solutions India Pvt. Ltd.). Mr. Shahani is a highly experienced business leader with rich experience of more than 40 years in the field of Power, Heavy, and Shipping industry. He is a Technical Adviser to many shipping and heavy industries across the globe.

Mr. Shahani is one of the most enthusiastic professionals and he has all the brilliance of an exemplary leader. He is an extremely effective coach and mentor of teams and is adept at providing leadership in a global, cross-cultural environment.

For more information regarding polishing crank journals, crankshaft bearing journal grinding, crankshaft journal grinding, and crankshaft grinding main journal, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

The post Stop Pay Heavy Charges for Grinding and Polishing of Crankshafts appeared first on Crankshaft Grinding Repair.