Grinding Services

An in-situ crankshaft grinding machine is a portable, precision tool designed to grind and polish crankpins and main journals directly on the engine, without dismantling or removing the crankshaft. It enables on-site repairs on ships or in power plants for crankshaft diameters ranging from 30mm  to  700mm

Product Details:

A leading shipping company based in Dubai contacted us regarding the failure of the crankshaft of a MAN B&W 5L 16/24 auxiliary engine. The vessel was on its way to Paranaguá Port, Brazil.

Damaged Crankpin of MAN B&W 5L 16/24 Crankshaft

 

MAN B&W 5L 16/24 Auxiliary Engine Crankpin Having Line Marks

 

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).

MPI Test of MAN B&W 5L 16/24 Auxiliary EngineMagnetic Particle Test of MAN B&W 5L 16/24 Auxiliary EngineAdvantages 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 Situ Crankshaft Repair of MAN B&W 5L 16/24 Auxiliary EngineMachining of MAN B&W 5L 16/24 Auxiliary EngineAvailability of Undersized Crankpin Bearings in Stock of MAN B&W Engine Model No. 5L 16/24
MAN B&W 5L 16/24 Auxiliary Engine Crankpin After Grinding And Polishing

A client operating a container vessel registered in Panama reported damage to the Daihatsu 6DK-20 engine. Our technicians boarded the vessel at Kolkata Port to assess the problem. The engine details are as follows:

 

 

On the visual inspection, the crankpin number #05 was observed to be damaged, and on the dimensional inspection, an ovality of 0.46 mm was observed. The readings are provided below:

 

After the pre-inspection of crankpin number 05 of the Daihatsu 6DK-20, as per the protocol, which included dimensional inspection, hardness testing, and Magnetic Particle Inspection (MPI) for crack detection, grinding was initiated, since all parameters were found to be within acceptable limits. The Crankpin Number #05 was undersized by 1.50 MM.

Supply Of Undersized Bearings For Daihatsu 6DK-20

Our technicians carried with them two (2) pairs each of 1.00 mm and 1.50 mm undersized crankpin bearings. The 1.50 mm bearings were fitted, and the engine was put back into operation within a few hours after the crankshaft repair of the Daihatsu 6DK-20 was executed. We maintain a large stock of crankpin bearings for the Daihatsu 6DK-20, as well as for other popular engine makes and models.

 

RA Power Solutions, with experience of more than 45 years, extends onsite crankshaft grinding services to leading shipping companies, power plants, and heavy industries all over the world.

We have a team of trained technicians available 24/7 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.

In place crankshaft machining and grinding of the MAK-1 8CM32C engine was carried out in Burkina Faso, West Africa, by RA Power Solutions. RA Power Solutions has long been a leader in insitu crankshaft machining and grinding, specializing in the repair of both small and large diameter of crankpins and main journals. The company brings over 45 years of experience in this field.

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.

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.