Repair of Crankshaft Archives - RA Power Solutions

In situ Machining of Sulzer Z 40/48 Crankshaft on vessel | Sulzer crankshaft repair

A Sulzer main engine Sulzer Z 40/48 aboard a container vessel faced serious damage to the crankshaft due to failure of the Governor, this resulted in damage to crankpins.

The major technical details of Sulzer Z 40/48 crankshaft are given below:

S. No.	Crankshaft Details
1.	Engine Make	Sulzer
2.	Engine Model	Z 40/48
3.	Crankpin Diameter Standard	330 mm
4.	Crankpin Bearing Width	132 mm
5.	Place of execution of crankshaft repair	Port of Las Calderas Bani in Dominican Republic

**Damaged crankpin of Sulzer Model Z 40/48**

**Repair of Crankshaft of Sulzer Model Z 40/48**

The inspection of the Sulzer crankshaft was done by our technicians and the following main observations were reported.

On removal of the connecting rod from all the six crankpins the crankpin bearings were observed badly damaged. There were deep scoring marks and localized damage on the crankpin.
The hardness and crack detection was done and they were observed to be within limits.
Deflection readings were within the parameters stipulated in the manual.
The crankpins dimensional were checked and ovality as per following table was observed.

**Sulzer Model Z 40/48 crank pin no 04 before grinding**

**Crankpin no. 05 of Sulzer Z 40/48 before grinding**

**Sulzer Model Z 40/48 crank pin no 06 before grinding**

Action taken by RA Power Solutions for successfully repair of crankshaft Sulzer Z 40/48

The ovality, deep scoring marks and local damage was observed on all crankpins, further the ovality ranging from 0.11 mm to 0.43 mm was observed as per the dimensional chart pasted above.
In this situation client’s management was consulted and a presentation was made on the damage to the crankshaft and the remedial action proposed by RA Power Solutions.
All the crankpins were undersized as per the chart below except crankpin no 01 which was only polished:

The radius fillet of two crankpins which were damaged due to the accident was also repaired.
After repair technicians again checked all the parameters and were found within limits.

Sulzer Model Z 40/48 crankpin repair results

RA Power Solutions experienced technicians repaired the crankshaft successfully within the tolerance limits specified in the manual and then re- install the crankshaft to full rated capacity of the load.

By undertaking the repairs of the crankshaft onsite without removing it from the engine block, clients save the down time and also the cost of removing it from the block and sending it to the workshop.

**Crankpin no. 03 after grinding & polishing on board a vessel**

**Sulzer Z 40/48 Crankpin after successful repair**

**Sulzer engine Z 40/48 Crankpin no. 05 after repair**

RA Power Solutions is ISO 9001:2015 (Quality Management System) & ISO 14001:2015 (Environmental Management System) certified approved company and extends crankshaft repair services all over the world. We can move our team of technicians and equipment anywhere in the world within 24 hours of first information.

We have been regularly executing on-site crankshaft repairs and crankshaft grinding in Dubai, Oman, Saudi Arabia, Qatar, Abu Dhabi, Sharjah, Ajman, Umm Al-Quwain, and Fujairah, Bahrain, Kuwait, Iraq, Antigua and Barbuda, Belize, Dominica, Dominican Republic, Grenada, Guyana, Haiti, Jamaica, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Trinidad, and Tobago, etc.

For more details of the Repair of engine, Engine Sulzer, please email us on raj.shahani@rapowersolutions.com, info@rapowersolutions.com or Call +91 9582647131, +91 9810012383.

Crankshaft Straightening – RA Power Solutions

It is generally observed that in case of failure of the crankpin bearing or main journal bearing, the crankshaft loses its alignment. The alignment of the crankshaft and its straightness is of great importance. The crankshaft alignment is specified by the manufacturer according to the crankpin diameter, main journal diameter length of the crankshaft, etc.

RA Power Solutions provides efficient and cost-effective services to keep engines running smoothly and reliably. Trust us to deliver top-notch crankshaft repair & straightening solutions, backed by years of expertise in the field.

In case there is a loss of crankshaft alignment, it is observed that the main journal bearings fail repeatedly.

RA Power Solutions undertakes straightening of the crankshaft as per the manufacturer’s specifications onsite by the peening process. The technicians are experienced and trained to correct the loss of alignment of the crankshaft by the peening process. Crankshaft repair & straightening is a crucial procedure employed to rectify crankshafts that have become bent or damaged due to extensive usage or mishaps.

The crankshaft is straightened by the peening process to the maximum extent and the final correction is done by grinding of main journals in case required.

We are a leading provider of crankshaft straightening services, ensuring the optimal performance and longevity of engines in various industries. RA Power Solutions guarantees exceptional results, enhancing the overall efficiency and reliability of engines, and earning the trust of clients worldwide.

RA Power Solutions specializes in expert crankshaft repair & straightening services. The crankshaft is a critical component of any engine, and over time, it can suffer from wear, damage, or misalignment due to various factors. With our state-of-the-art technology and experienced technicians, RA Power Solutions offers reliable solutions to restore crankshafts to their optimal condition.

Get in touch with RA Power Solutions today, and let us help you maintain the performance and longevity of your machinery through expert crankshaft straightening services. We look forward to serving you!

For more details regarding crankshaft grinding please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Crankshaft Repairs Made Easy – RA Power Solutions

Crankshaft grinding and polishing is an important activity which is required after running of engine for a long time as due wear and tear taper and ovality is created. Again in case of failure of bearing grinding and polishing of crankshaft is required. In olden times it was necessary to remove the crankshaft from the block and send it to the designated workshop for grinding and polishing of crankshaft.

The removal of crankshaft from the block involved disassembly of complete engine, packing, and transportation to the workshop resulting to high downtime and expensive. RA Power Solutions has developed, design, and manufactured on site crankshaft grinding machine which can undertake grinding of crank pins or journals up to the diameter of 700 mm. The machine is capable of maintaining the tolerance within 0.02 mm in terms of taper and ovality. It is very easy to operate and needs minimum training.

The machine is light in weight and can be taken to the site. The machine is in two parts and can be inserted in the engine block through the inspection window facilitating grinding of CR Pin without removal of crankshaft. The grinding and polishing is undertaken by same machine. RA Power Solutions suggest polishing and grinding if necessary the crankshaft whenever it is open for major overhauling. This will considerably enhance the life of crankshaft, bearing, and engine. The machine gets drive from a pneumatic turbine which is again lightweight. The drive is also given by a electrical motor where the air supply is not available. The assembly of the machine and its operation can be seen on a YouTube channel

https://www.youtube.com/channel/UCxcP2Jc6DGFdpBokIcxVyBg

RA Power Solutions has supplied more than 100 machines to the clients based all over the world who are more than satisfied with its performance, quality, and ease of operation. The crankshaft grinder is manufactured by us to cater to the crankshaft diameter ranging from 35 mm to 700 mm. All the parameters specifications and tolerances as required by the engine manufacturer are maintained after undertaking the crankshaft repair by the crankshaft grinder manufactured by RA Power Solutions.

For more information on crankshaft repair made easy, crankshaft grinding, crankshaft grinding and polishing, in situ crankshaft grinding machine, and repair of crankshaft email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.