crankshaft grinding repair Archives

Daihatsu 5DK-20 Crankshaft Repair | RA Power Solutions Forty-Five Years Of Experience

Daihatsu 5DK-20 crankshaft has been successfully repaired by RA Power Solutions technicians on board a vessel recently. A leading shipping company based in Greece operating more than fifty container vessels approached RA Power Solutions to repair the crankshaft of Daihatsu 5DK-20 on the vessel.

The main challenge was that the crankpin no. 03 of Daihatsu 5DK-20 met with a serious accident damaging the radius fillet of both sides of the crankpin. They had a stopover of only 18 hrs at Mundra Port India.

In fact, the owners disparately tried to get the crankpin repaired in Dubai and approached leading companies but none of them was able to repair the crankpin with a damaged radius filet.

Major Technical Details Of Daihatsu 5DK-20 Crankshaft

S. NO	Crankshaft Details
1.	Engine Make	Daihatsu
2.	Engine Model	5DK-20
3.	Crankpin Diameter Standard	170 mm
4.	Crankpin Bearing Width	78 mm
5.	Place of execution of crankshaft repair	Mundra Port India

Before grinding and polishing of Daihatsu 5DK-20 crankshaft — **Picture Showing Before Grinding and Polishing of Daihatsu 5DK-20 crankshaft**

**Crankshaft grinding of Daihatsu 5DK-20**

Action taken by RA Power Solutions for successful repair of Daihatsu 5DK-20 Crankpin

Dimensional inspection of the crankpin no. 03 was done by the technicians and an ovality of 0.49 mm with deep bearing marks, rough surface, etc was observed.
The radius fillet of both sides of crankpin no. 03 was damaged badly in fact the original profile of the fillet radius of Daihatsu crankshaft was lost due to an accident.
Hardness and crack detection tests were undertaken and were found within limits.
Deflection was also within the parameters.
Our technicians with the help of specially designed compact dedicated tooling for repair of crankpin having small bearing width used the equipment. They reduced the diameter of the crank pin by 1.0 mm and maintained the final diameter of 169.00 mm. Maintaining the tolerance within 0.02 mm, the preparation & formation of radius fillet on both sides of the crank pin was a challenge which was done by our technicians within 18 hours of boarding the vessel.
In this case of Daihatsu 5DK-20 the crank pin bearing width is only 78 mm and with our specially designed equipment it was possible to undertake the grinding.No other company have the compact tooling to undertake such repairs on site without removing it from the engine block.
The bearing is only 1.0 mm undersize and was supplied by RA Power Solutions. The engine was commissioned during the presence of our technicians on board the vessel.

**Daihatsu 5DK-20 after Grinding & Polishing**

**Crankpin Daihatsu 5DK-20 after Repair**

RA Power Solutions is ISO 9001:2015 (Quality Management System) & ISO 14001:2015 (Environmental Management System) certified approved company.

We have been regularly executing onsite 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 and supply of bearings, Daihatsu 5DK-20 Crankshaft repair please email us on rajshahani@rapowersolutions.com, info@rapowersolutions.com or Call us at +91 9582647131, or +91 9810012383.

Save Daihatsu DC-17 Crankshaft From Rejection | Forty Five Year’s Expertise

Contact RA Power Solutions for undertaking the Daihatsu DC-17 crankshaft repair and all models without removing the crankshaft from the block.

MAJOR TECHNICAL DETAILS OF DAIHATSU DC-17 :

S. NO	Crankshaft Details
1	Engine Make	Daihatsu
2	Engine Model	6DC-17 Engine
3	Crankpin Diameter Standard	145mm
4	Crankpin Bearing Width	64mm
5	Place of execution of crankshaft repair	Odisha Port India

Crankshaft Grinding of Daihatsu DC-17 Engine

As can be seen from the above the crankshaft of Daihatsu DC 17 crankpin width is only 64 mm and diameter is 145 mm which is considered to be very small. It requires a very compact design of Insitu crankshaft grinding machine which can be inserted from the engine block.

RA Power Solutions is the only company in the world which has the latest technology, Equipment, and process available for crank pin grinding and polishing of Daihatsu DC-17 without removing it from the engine block. The grinding of crankpin can also be done while sailing of the vessel.

Machining of crankshaft of Daihatsu DC-17

Grinding under Process of Daihatsu DC-17

Save Crankshaft of Daihatsu DC-17 contact RA Power Solutions for successful and Guaranteed repair

Since no other crankshaft repair company in the world has equipment, technology, and process available for repair of the crankshaft of Daihatsu DC17, they insist on removing it from the block and sending it to the workshop or rejecting it by giving some excuses.
Contact RA Power Solutions who have forty-five years of experience in onsite crankshaft grinding and have successfully repaired more than hundred crankshafts of Daihatsu DC-17 all over the world.
The reference of that client, certificate of satisfactory performance, and inspection reports signed by chief engineers of the vessel can be furnished on request.
Reduce downtime, and save crankshaft by getting it repaired by RA Power Solutions.
Undersize bearings of all sizes of crank pin are available in our stock.

RA Power Solutions is ISO 9001:2015 (Quality Management System) & ISO 14001:2015 (Environmental Management System) certified approved company.

We have been regularly executing onsite 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.

Crankpin of Daihatsu DC-17 Engine Crankshaft after Repair

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

Crankshaft Repair | Crankshaft Grinders | Onsite Crankshaft Machining

RA Power Solutions undertakes the Grinding of Crankshaft of High Capacity Engines used in Shipping companies, Power plants, and in various other sectors. The company has experience of more than forty years in undertaking successful repair of Crankshafts and major components. As we are aware Crankshaft is the heart of the engine and is the most expensive part with limited availability of particular make and model.

Our expertise lies in the repair of crankshafts that meets with a serious accident like a Seizure of a bearing. It is generally observed that due to rubbing of the bearing steel surface with the CR Pin diameter, excessive heat is generated. Thus there is an increase in Hardness. Every manufacturer specifies the maximum limit of Hardness.

Damaged CrankPin of Mirrlees Blackstone Engine

In the case of Mirrlees Blackstone K and KV, major series of engines, the normal hardness at the time of manufacturing of the crankshaft is between 21.5 to 26 on HRC Scale (241 to 268 on the HB scale). It is obvious that after the seizure of the bearing, the hardness increases even to the level of 45 to 50 HRC.

The Mirrlees Blackstone allows the higher hardness under a deviation maximum of up to 32 HRC against the standard of a maximum of 26 HRC. In normal situations as per the manufacturer, the crankshaft stands rejected as it has far higher Hardness than the stipulated in the manual.

RA Power took the following action to save the Crankshaft.

The Hardness was taken on various spots, not having a gap of more than 15 mm.
Hardness was recorded and a maximum hardness of 50 HRC was observed.
Since bearing line marks, taper, and ovality on the crank pin were observed, the grinding was undertaken and CR Pin dia was reduced by 3.5 mm approx.
The Hardness was reduced and the maximum Hardness of 42 HRC was observed in a few spots. Although the 42 HRC Hardness was on the higher side than the maximum limit of 32 HRC specified by the manufacturer. The Crankshaft was accepted under deviation due to the following reasons:
1. The higher Hardness was observed in a scattered pattern.
2. The higher hardness was away from the Lubricating Oil Hole and radius fillet of the CR Pin which are considered to be critical Zone.

The versatility of RA Power Solutions crankshaft grinders caters to a wide range of marine and industrial crankshafts, irrespective of their size and design.

The Crankshaft was accepted and his performance is observed as satisfactory from last more than three and half years. The saving of the Crankshaft from rejection was possible only due to the Experience RA Power Solutions has of successful repair of more than ten thousand crankshafts.

RA Power Solutions undertakes Crankshaft Repair, Crankshaft Grinding and offers Onsite Crankshaft Machines to repair companies. We are a leading provider of crankshaft grinding and repair services, In Situ Crankshaft Grinding And Repair specializing in utilizing state-of-the-art crankshaft grinders.

With our state-of-the-art crankshaft grinders and highly skilled technicians, we can accurately recondition damaged or worn-out crankshafts to the original manufacturer’s specifications. By using advanced techniques and precision machinery, RA Power Solutions ensures that the repaired crankshafts regain their perfect alignment, surface finish, and dimensional integrity. Whether it’s a large marine engine or a compact generator, their expertise and commitment to quality make them a reliable choice for any crankshaft-related concerns.

With the use of RA Power Solutions crankshaft grinders, a significant decrease in downtime and repair costs can be achieved, allowing businesses to maintain productivity and efficiency.

Note: The writer of this article is Mr. Raj Shahani, Managing Director of RA Power Solutions Pvt Ltd.

Grinding & Repair of Crankpin is in Process

Finished Crankpin after Grinding & Repair

For more details on in situ crankshaft grinding and repair, crankshaft grinders, crankshaft grinding repair services, or crankshaft machining contact today by email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Crankshaft Grinding and Crankshaft Repair By Experienced Technicians – RA Power Solutions

Crankshaft grinding and crankshaft repair are important for the satisfactory performance of the engine. RA Power Solutions Pvt. Ltd. has been undertaking crankshaft repair onsite by a portable, lightweight crankshaft grinding machine. The crankshaft repair is executed of crankshaft diameters ranging from 60 mm to 700 mm.

We have team of trained and dedicated technicians who are deputed to the site with crankshaft grinding machine along with necessary instruments. The crankshaft repair is undertaken without removing the crankshaft from the entablature.

Crankshaft Grinding of Wartsila Diesel Engine

The crankshaft grinding machine used to undertake crankshaft repair is of latest design having minimum vibrations. This facilitates our technicians to undertake crankshaft repair even while the vessel is sailing. The tolerance after crankshaft grinding and crankshaft repair is maintained within 10 to 20 microns in terms of taper and ovality.

The repair of crankshaft and overhauling of engine while sailing of the vessel between two ports results to the considerable saving to the ship owners as there is no need of holding the vessel at port or anchorage.

The insitu crankshaft grinding and repair executed by us is guaranteed for the satisfactory performance. As on date we have executed more than 10,000 repair of crankshaft all over the world.

Crankshaft Grinding of MAN Diesel Engine

For more information on insitu crankshaft grinding and repair, in situ crankshaft grinding machine and grinding of crankshaft 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.

Revolution in Crankshaft Grinding- RA Power Solutions

Good News for Shipping Companies, Power Plants, and Repair Workshops.

A crankshaft grinding machine up to 700 mm diameter is designed, developed, and manufactured by RA Power Solutions. The machine is having following features:

Crankshaft Machine Design: The Crankshaft Machine is portable, light weight and can be carried to the site. Nowadays, there is no need for the disassembly of a complete engine.

Operation of Crankshaft machine: The machine is operated pneumatically or by electrical motor. The design is so simple and machine can be easily operated by a skilled technician.

Quality: Crankshaft grinding machine is capable of maintaining close tolerance in terms of taper and ovality up to 20 microns and can also achieve the surface finish as per the International standards.

Training: RA Power Solutions Pvt. Ltd. provides training to the clients, and technicians for the duration of 3 days. The assembly, operation, and maintenance of the machine are explained.

Cost of Machine: Presently, shipping companies and power plants having high-capacity diesel generating sets have no option but to call for technicians from the companies based in Norway, Singapore, UK and various countries by paying exorbitant amount and travel expenses. The Crankshaft grinding machine is manufactured by RA Power Solutions is very reasonably priced and the cost can be recovered in 1 or 2 jobs of repairs.

RA Power Solutions supplied more than 60 In situ crankshaft grinding machines and crankshaft polishing all over the world which are performing satisfactory.

Disassembly of Crankshaft Grinding Machine with Pneumatic Motor

Assembly of Crankshaft Grinding Machine in Progress

Assembly of Crankshaft Grinding Machine with Pneumatic Motor — Assembly of Machine with Pneumatic Motor

Packing in Progress- Insitu Crankshaft Grinding Machine

For more information on revolution in crankshaft grinding and polishing , Crankshaft Repair contact us today by please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.