crack repair by metal stitching Archives

Wartsila VASA 12V32 LN Crankshaft Repair

RA Power Solutions was approached by a leading Cement manufacturing Plant based in Nepal regarding the failure of their Crankshaft of Wartsila Diesel Generator model no. WARTSILA VASA 12V32 LN.

The Cement Plant in Nepal is having multiple numbers of Wartsila diesel generating sets model VASA 12V32 LN, Wartsila 18 V 32, and Wartsila 12 V32. The one number crankpin got damaged due to seizure of the bearing of Wartsila Diesel generating set Vasa 12 V32 LN.

Wartsila Diesel Generator Crankshaft main Observations:

On inspection of all the crankpins visually the Bearing of crankpin no. 3 was observed damaged and bearing material was found in the oil sump.
On removal of connecting Rods from crank pin no 3. A & B bank, it was found that the bearing was badly struck to the crankpin diameter and it was a case of bearing failure.
The Bearing was removed from the crankpin and on visual inspection, it was observed that bearing material was embedded on the crankpin. The radius fillet of both sides of the crankpin was found damaged and the profile of the radius fillet was distorted.
After cleaning and little polishing of crankpin to remove the bearing material the crack detection test by MPI method was undertaken. No crack was observed.
The hardness was also checked and it was observed in the range of 600 HB in a scattered formation which is considered to be on the higher side.
The crankpin was subject to dimensional inspection and the following dimensions were observed.
- Minimum diameter observed- 269.02 mm
- Maximum diameter observed- 270.00 mm

Against the standard diameter of 270 mm, the ovality of 0.98 mm was observed which is considered to be very much on a higher side.

**Installation of onsite crankshaft Grinding machine on Wartsila Crankpin**

Surface finish test crankpin of Wartsila 12V32 LN Crankshaft — **Installation of onsite crankshaft Grinding machine on Wartsila Crankpin**

Achievement by RA Power Solutions in successful Repair of Wartsila Crankshaft 12V32 LN:

The successful repair of damaged crank pin no. 3 of Wartsila Crankshaft 12V32 in a short time of 79 hrs is an achievement, the grinding of crankpin was undertaken nonstop on 24 hours basis by a team of three technicians of RA Power Solutions.

RA Power technicians have undertaken the grinding of crankpin having a standard diameter of 270 mm. Due to serious damage of crankpin, it is to be undersized by 2.0 mm.

The Wartsila Diesel Generator set has been assembled and is in operation.

We have been regularly undertaking crankshaft repair of Wartsila Diesel engine Model No. 12V32, Wartsila 46, Wartsila 43, Wartsila 12V26, Wartsila 12V20 and can undertake grinding of crankshafts up to 700 mm diameter.

**Grinding of Wartsila 12V32 LN Crankpin**

**Crankpin of Wartsila 12V32 LN Crankshaft after grinding & polishing**

For more details of the crank pin grinding machine, wartsila crankshaft repair, and wartsila diesel generator crankshaft email us on info@rapowersolutions.com, rajshahani@rapowersolutions.com, call at +91 9582647131,+91 9810012383.

Crankshaft Grinding Services By Experienced Technicians – RA Power Solutions

When it comes to maintaining marine engines, one vital aspect that deserves the utmost attention is the crankshaft. The crankshaft plays a crucial role in converting linear motion to rotational motion, and any wear or damage to this component can lead to a significant decrease in engine performance. However, thanks to the expertise of experienced technicians and specialized services like Crankshaft Grinding, marine engine owners can revitalize their crankshafts and restore optimal engine functionality. In this blog, we will delve into the significance of crankshaft grinding services and how they can breathe new life into your marine engines.

RA Power Solutions provides onsite crankshaft grinding services for last four decades. Crankshaft having diameter up to 700 mm is repaired onsite without removing the crankshaft from the engine block.

The grinding of crankshaft onsite is possible by introduction of onsite crankshaft grinding machine which is portable, light weight and can be inserted from the inspection window of the engine block. RA Power Solutions also manufactures and sells crankshaft grinding machine. The crankshaft grinding services are offered by us through our technicians who are well trained in our workshop and have experience of providing crankshaft grinding services . After repair of crankshaft, the dimensional tolerances are maintained within 20 to 30 microns and surface finish as per the international standards.

Prior to undertaking grinding of crankshaft, all the major parameters of crankshaft i.e. dimensional inspection, hardness test, crack detection, deflection, etc. are checked.

In case the basic parameters are found within the repair limits, crankshaft grinding is undertaken. RA Power Solutions can maintain the tolerances strictly as per the manufacturer’s recommendations. With the introduction of latest design of onsite crankshaft grinding machine the vibrations in the crankshaft grinding machine are reduced to minimum. This ensures maintenance of close tolerance and also facilitates grinding of crankshaft on board a vessel while it is sailing in high seas. The grinding of crankshaft while sailing of the vessel results to the considerable saving to the owners.

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

Crankshaft Repair on Board a Vessel by Experienced Engineers – RA Power Solutions

RA Power Solutions Pvt. Ltd. can easily undertake crankshaft repair on board a vessel while it is sailing by using special equipments.

We can undertake crankshaft repair up to the diameter of 700 mm while the vessel is sailing in high seas in anchorage or at berth. This result to considerable saving for ship repairs as no time is wasted for crankshaft repair as it does not require any anchorage or berth.

RA Power Solutions having 45 years of experience have executed more than 10,000 jobs of repair of crankshaft successfully which is a record.

Damaged Crankpin of MAN Marine Diesel Engine

The crankshafts which have been even rejected by the manufacturers are successfully repaired by us using various process/special equipments which we are learned from our experience. All the repair of crankshaft executed by us is guaranteed for the satisfactory performance. The tolerances as stipulated in the manual are strictly maintained.

Most of our technicians have seaman book and they can sail to any part of the world.

For more details regarding in situ crankshaft grinding, crankshaft repair on board a vessel and onsite crankshaft repair please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Metal Locking and Metal Stitching Process- RA Power Solutions

Metal locking and metal stitching is a process of repair of cast metals having different metallurgy without the necessity of wielding. Metal locking and metal stitching is a cold and proven method of repair of cast iron and cast steel components.

The advantage of crack repair and broken casting by metal locking and metal stitching is that it can be carried out at the site anywhere and it even does not require dismantling of the equipment in most of the cases this results to considerable saving of time and money. Crack and broken casting repair is proven and is old method for crack repair it is widely used for heavy-duty plant and equipment, ship engine, heavy-duty forging presses, etc.

**Metal Stitching of JIBB Plate of 225 Ton**

We regularly execute crack repair by metal locking and metal stitching of following parts:

Engine Block, Cylinder Head, Generators, Turbo Chargers, Turbine Casing, Gear Box Housing, Pump Casings, Compressor Crank Cases, Forgings Hammer, Lathe / Press/ Milling/Boaring, etc .M/c. all Cast equipment etc.

RA Power Solutions is a leading provider of metal locking services. We have a team of experienced engineers and technicians who are skilled in using this technique to repair a wide variety of castings. We have a proven track record of success, and we are confident that we can provide you with a high-quality repair that will meet your needs.

If you have any questions about our services please contact RA Power Solutions. We would be happy to answer your questions and discuss your specific needs.

For more information on cold metal lock stitching, metal stitching service provider, metal stitching cast iron, crack repair, and metal stitching of engine block email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Metal Stitching and Metal Locking of Engine Blocks – RA Power Solutions

Engine blocks, casting and most of the parts are manufactured of common material like cast iron. Cracks developed in cast iron parts are most difficult to undertake repair by welding process as it needs pre-heating of the cast iron prior to the welding. In certain cases it can cost additional stresses resulting to the damage of casting.

It is proven that metal stitching and metal locking have the advantage of repairing cracks in cast iron casting due to the cold process using different profiles and materials of stitching pins and locks without applying any heat, as in the case of welding.

RA Power Solutions Pvt. Ltd. undertakes metal stitching and metal locking of casting and has successfully repaired various major components of a high-capacity diesel engine.

Application includes repair of Engine Block, Cylinder Head, Generators. Turbo Chargers, Turbine Casing, Gear Box Housing, Pump Casings, Compressor Crank Cases, Forgings Hammer, Lathe / Press/ Milling/Boaring etc .M/c. Other all Casting equipment etc.

In the last 45 years, more than 10,000 jobs of crack repair have been successfully executed.

Stitching Pin Used in Metal Stitching Process

Metal Stitching Done in Broken Area of Generator

RA Power Solutions is proud to say that we have a dedicated team of specialists who specialize in metal lock and metal stitching repairs. We promise good performance on all of our jobs. We have shown to be cost-effective and can deploy our team of professionals and consumables on short notice. We have recently expanded these services to Dubai, Greece, Maldives, Malaysia, Singapore, Madagascar, Nigeria, South America, UAE, Germany, Monaco, Qatar, Sri Lanka, Bangladesh, Italy, Spain, Czech Republic, UK, Nepal, Philippines, Jordan, Libya, Kuwait, Egypt, Morocco, Yemen, Bahrain, Tunisia, Sudan, Oman, Algeria, Saudi Arabia, Iraq, and others.

For more details regarding crack repair by metal stitching, engine block repair, cold metal lock stitching, and cast iron by metal lock & metal stitching, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.