Onsite crankshaft grinding Archives

Daihatsu 6 DK-20 Crankshaft Repair | Onsite Grinding of Daihatsu Engine Crankshaft | Crankshaft Machining In Situ

RA Power Solutions was approached by a company based in Greece regarding a problem faced by them in their auxiliary engine of Daihatsu 6 DK-20.

It was reported that the bearing of crankpin no.3 got damaged.

THE ENGINE DETAILS OF DAIHATSU 6 DK-20 ENGINE ARE AS FOLLOWS:-

S. NO	Crankshaft Details
1	Engine Make	Daihatsu
2	Engine Model	6 DK-20
3	Crankpin Diameter Standard	170 mm
4	Crankpin Bearing Width	78 mm
5	Name of Vessel	MV ABBA

ACTION TAKEN BY RA POWER SOLUTIONS TO REPAIR THE CRANKSHAFT OF DAIHATSU 6 DK-20:-

Technicians on boarding the vessel inspected the crankshaft.
The hardness of crankpin no.3 was observed within limits between 210 to 240 HB scale.
After a thorough cleaning of crankpin No. 3, the MPI test was done and no cracks or abnormality was observed.
Crankpin no. 3 was subject to dimensional inspection.

FOLLOWING ARE THE MAIN OBSERVATIONS:-

a) Minimum diameter observed – 169.10 mm

b) Maximum diameter observed – 169.33 mm

c) Total ovality -0.40 mm

The crankshaft was already undersized to 169.50 mm against the standard size of 170.00 mm.

ACTION TAKEN BY RA POWER SOLUTIONS FOR REPAIR OF CRANKSHAFT OF DAIHATSU 6 DK-20:-

The onsite crankshaft grinding machine was set up and grinding of crankpin no.3 was undertaken by reducing the diameter by 1 mm.

a) The minimum diameter observed after grinding – 168.98 mm

b) Maximum diameter observed after grinding – 169.00 mm

c)Total ovality observed after grinding – 0.02 mm

After grinding crankpin no. 3, the engine was assembled and put on trial.
We will be pleased to share the original pre and final machining inspection reports duly signed by the chief engineer of the vessel which has all the technical details required for the successful repair of the crankshaft.

REPAIR OF CRANKSHAFT OF DAIHATSU 6 DK-20 HAVING CRANKPIN BEARING WIDTH OF ONLY 78 MM:-

It was possible for RA Power Solutions to successfully undertake repair of the crankpin having a bearing width of only 78 mm because we have the equipment which can be placed on the crankpin or main journal diameter having a bearing width of as small as 40 mm.

With this advanced technology and process, no other crankshaft repair company has due to which they either reject the crankshaft or recommend getting it repaired from the workshop.

**Crankpin of Daihatsu 6 DK-20 Engine Crankshaft before Repair**

**Magnetic Particle Test of Crankshaft of Daihatsu 6 DK-20 Engine**

**Repair of Crankshaft of Daihatsu 6 DK-20**

**Crankshaft Grinding of Daihatsu 6 DK-20**

We have been regularly executing the repairs in Greece, Moldova, Belarus, Australia, Austria, Belgium, Brazil, Cambodia, Colombia, Denmark, Ethiopia, Ghana, Haiti, etc.

This blog is written by Mr. Raj Shahani (Managing Director of RA Power Solutions India Pvt. Ltd.) and a highly experienced business leader with rich experience of more than 40 years in the field of Power, Heavy, and Shipping industry. He is 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 on bearings for Daihatsu engine and Daihatsu crankshaft repair contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.

Onsite Crankshaft Refurbishment | Repair of Main Engine Crankshaft

Portable Crankshaft Grinding Machine is Ready for Dispatch

RA Power Solutions company based in New Delhi, India undertakes crankshaft refurbishment onsite. There is no requirement for disassembly and removal of the crankshaft from the engine block.

We specialize in onsite crankshaft refurbishment, providing a cutting-edge and efficient solution to the challenges faced by industries in need of crank

Our technicians who are well experienced can travel to your site on land or on a vessel with necessary inspection instruments and onsite crankshaft grinding and polishing machine and undertake the necessary onsite repair.

Following is the outline of the inspection and repair of the main engine crankshaft:

I) Inspection of Crankpin/Main Journal: It is important that the surface geometry of the crankpin or main journal is thoroughly checked such as roundness defect, loss of alignment, conicity, barrel form, surface finish, etc.

RA Power Solutions have inspection formats and all the observations of the surface geometry parameters as described above are recorded.

II) Polishing or undersize journals and crankpin:

On the basis of surface geometry reports, the available decision is taken in regard to polishing or grinding of the crankpin and main journal. In the event of minor bearing line marks, pitting, or rough surface it is recommended that these defects are removed only by the process of polishing of crankpin and main journal.

Grinding & Repair of Damaged Crankpin on Board a Vessel

III) RA Power Solutions, the main engine crankshaft repair company uses the latest lightweight and easy-to-operate onsite crankshaft grinding and polishing machine which improves the surface finish without under-sizing of crankpin/main journal diameter.

IV) We recommended the inspection and polishing of crankpins or main journals periodically whenever the engine is taken up for major inspection or overhaul.

If the surface geometry is not within limits specified in the manual by the engine manufacturer and exceeds the tolerance the undersize of journals/crankpins is recommended.

V) Repair of engine crankshaft is recommended in case of severe damage and it becomes necessary to recondition the journal/crankpin by grinding to the next undersize or depending on the availability of undersize bearings.

RA Power Solutions uses high-precision onsite crankshaft grinding machine to undersize the crankpins and tolerance is maintained strictly as per the manufacturer’s specifications. Crankshaft regrinding of large diesel engines up to 700 mm in terms of diameter is undertaken.

We are fully equipped to extend emergency crankshaft repair services through our experienced technicians as they possess valid Indian CDC and can fly all over the world on short notice. The job of crankshaft refurbishment and emergency crankshaft repair is possible even while sailing the vessel. The onsite crankshaft grinding machine is designed to generate minimum vibrations which facilitates maintaining close tolerance.

We specialize in under-size and special-size bearings

The author of this blog is Mr. Raj Shahani (Managing Director of RA Power Solutions). He has forty years of experience in the field of crankshaft repair of high-capacity marine and diesel engines.

For any queries on onsite crankshaft refurbishment, repair of main engine crankshaft, crankshaft inspection onsite, and grinding & repair of damaged crankpin on board a vessel please drop us an email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Crankshaft Grinding & Polishing Machine | Onsite Cylindrical Grinding Machine

Crankshaft is considered to be a heart of the engine. It is important that all the parameters recommended by engine manufacturers are strictly maintained for continuous and satisfactory performance of the engine.

It is observed that crankshaft failure can happen at any time in spite of excellent maintained engine. Secondly, due to continuous running of a diesel engine wear and tear, development of taper and ovality, pitting, and rough surface is developed. This needs to be corrected. By introduction of onsite crankshaft grinding and crankshaft polisher machine, RA Power Solutions has made onsite crankshaft grinding and polishing easy. Now there is no need of removing the crankshaft and sending it to the workshop for repairs.

**Crankshaft Grinding and Polishing Machine**

With our revolutionary onsite crankshaft grinding and onsite polishing machine, it is possible to do the repair crankshaft onsite.

Crankshaft grinding & crankshaft polishing machine has the following features:

The crankshaft grinding machine is available in the range of 30 mm to 700 mm which covers crankshafts of small to high-capacity engines.
The performance of onsite crankshaft grinding machine manufactured by RA Power Solutions is a proven, solution-focused approach with guaranteed results in terms of tolerances. By using onsite crankshaft grinding machine, shipping companies, diesel power plant, and drydocks have reduced the downtime considerably and save money which really matters due to competition.

**Crankshaft Grinding Machine of High Diameter**

The onsite crankshaft grinding and polishing is undertaken by the same equipment. Every time engine is open for major overhauling, crank pin and main journal of crankshaft can be polished to remove the bearing line marks and to improve the surface finish. This increases the life of bearing and avoids crankshaft from breakdown.
The crankshaft grinding and crankshaft polishing machine is designed to provide workshop quality service onsite, drydock or even while sailing of the vessel. The crankshaft grinding equipment has minimum vibrations, manufactured of titanium alloy which absorbs the vibrations. This facilitates to maintain close tolerances of crankpin and main journal of the crankshaft even while sailing of the vessel.
24/7 global support services are provided for any guidance for operation and maintenance of the onsite crankshaft grinding machine. A training program is designed and arranged onsite covering all the aspects of the operation and maintenance of the machine.
Machine is priced low and has the capability to generate high revenue in a short time. The onsite crankshaft grinding machine is supplied complete in all respect and ready to operate with consumables sufficient to repair one crankshaft.

**Crankshaft Grinding Machine for Small Diameter**

RA Power Solutions maintains a large databank of crankshafts of reputed diesel engine manufacturer and their models.

The author is Mr. Raj Shahani, Managing Director of the company. He is having 40 years of experience in grinding of crankshaft, polishing of crankshaft and all services related to repair of engines and supporting equipment. He has designed and developed the portable crankshaft grinding machine to save time and money.

We will be pleased to share more information regarding onsite crankshaft grinding and polishing machine, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

**Onsite Crankshaft Grinding Machine Ready for Dispatch**

**Accessories of Onsite Crankshaft Grinding and Polishing Machine**

Crankshaft Grinding | Crankshaft Repair Services

RA Power Solutions undertakes onsite crankshaft grinding and crankshaft repair for the diameter ranging from 30 mm to 700 mm.

The small diameter crankshaft is repaired on site without removing the crankshaft from the block. These services are of great use for the engines which are installed in construction-related equipment, compressors, and diesel-driven equipment operating in remote areas.

Our crankshaft repair services of crankshaft grinding and crankshaft repair are proven as we have been extending these services all over the world for the last forty years.

The main feature of onsite crankshaft grinding, onsite crankshaft repair, crankshaft polishing are as following:

RA Power design and manufactures on site crankshaft grinding equipment as per the site requirement and space constraints Hence there is no compromise with the quality after the repair of the crankshaft.
All the parameters of the crankshaft grinding are maintained strictly as per the manufacturer’s recommendations and tolerances. An inspection report in detail is submitted to the client.
In RA Power Solutions, we give great importance to the calibration of the crankshaft and inspection in detail by experienced technicians which helps us to plan the right strategy and selection of the right equipment for onsite grinding and onsite repair of crankshaft.
We possess the latest breed of inspection instruments including the instruments for the NDT test which helps us to find out the exact fault in the crankshaft resulting in successful repairs.
Replacement of crankshaft in case of breakdown by new crankshaft or reconditioned crankshaft is our expertise. The crankshaft of an auxiliary engine can also be replaced while sailing the vessel.

**Grinding of Crankpin by Crankshaft Grinding Machine is in Process**

Our services for crankshaft grinding and repair are available 24*7. Technicians can fly down with portable lightweight crankshaft grinding machine in short notice to all over the world as they carry Indian CDC.

We have been regularly working for various models of engines like Wartsila, Daihatsu, MWM, Caterpillar, MaN, MaK, B&W, Sulzer, Bergen, Detroit Diesel, Stork Werkspoor, Pielstick, Deutz, Yanmar, MTU, Cummins, Nohab Polar, Caterpillar, Mitsubishi, Yanmar, MaK 551, MaK 552, MaK 453, MaK 451 AK, MaK 452 AK, Deutz 540, Deutz 358, Deutz 350, Pielstick PC 2.2 PC 2.5, Wartsila 524, Wartsila 824 TS, Sulzer 6 AL 25/30 and many more.

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 Grinding Service on Moving Vessel**

Onsite Crankshaft Grinding | Crankshaft Repair | Crankshaft Polishing and Grinding – RA Power Solutions

RA Power Solutions undertakes Onsite Repair and Grinding of Crankshaft up to diameter of 700 mm. The experience technicians travel with light weight latest design of On site Crankshaft Grinding Machine to execute the Crankshaft Repair. The On site Crankshaft Grinding Machine has following benefits to the clients.

The Benefits:

You do not need to remove the Cranks shaft from the engine or press.
We save your time: – some of these repairs can be carried out as little as 24 hours.
We save your money: – The engine does not have to be stripped down and transported or reassembled. The savings on this alone are usually very significant.
We keep your plant running: – Downtime is minimized so that you can be back into operation and earning money sooner.

Machining and polishing of Crankshaft and Crankpin are carried to OEM tolerances and surface finish specifications.
We cover standard Crankshaft diameter ranging from 30 mm to 700 mm.
Our patented orbital equipment rotates around damaged crankpin journal using the radius as a datum.
We can also Hone and Polish your crankpin if the damage is slight or you just want to improve the surface finish up to 0.3 micron Ra Value.

For more information on on site crankshaft grinding, onsite crankshaft repair on vessel, onsite crankshaft machining and polishing, onsite crankshaft maintenance services, or insitu crankshaft grinding please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Repir ofCrankshaft MAN B& W — Repair of Crankshaft MAN B& W

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 for last 30 to 35 years. 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.

Importance of Hardness in Crankshaft – RA Power Solutions

The hardness of crank pin and main journal of crankshaft is of great importance for the satisfactory performance of the crankshaft. In case of low RPM diesel engine, the crankshafts are not hardened and the hardness is achieved by the metallurgical properties. In case of high RPM engine, crankshafts are hardened. The most common process followed by the manufacturers of crankshaft grinding machine is to go for induction hardening.

Due to seizure of bearings, the temperature goes high and the hardness increases. The increase in hardness makes the crankshaft brittle resulting to the development of crack.

RA Power Solutions Pvt. Ltd. suggests that whenever seizure of bearings takes place it is important that crankshaft hardness is checked and presence of crack should also be checked either by dye penetrant process or Magnaflux.

In cases of this form of failure, it is typically seen that hardening occurs, which results in the development of hard spots and hard areas next to the soft sections, even up to the scale of 700 HB. According to the manufacturer’s specifications, the extraordinarily high increase in the crankpin journal hardness is not desirable so the crankshaft is heated up and annealed.

Onsite Crankshaft Grinding in a Power Plant

Crankpin After Repair by Crankshaft Grinding Machine

In order to reduce the hardness and bring it to the limits specified by the manufacturers, RA Power Solutions has undertaken the annealing process in-house and have also availed the services of leading well-known European companies offering annealing services.

Author is Managing Director of RA Power Solutions Pvt. Ltd. having almost four decades of hands on experience in providing consultancy, repair and supply of new and reconditioned crankshafts for high capacity diesel engine. More than 2000 crankshaft have been successfully repaired all over the world, some of which were even rejected by reputed engine manufacturers.

For more information on onsite crankshaft grinding, grinding of crankshaft, crankshaft repair of high-capacity diesel engine email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Introduction to RA Power Solutions Pvt. Ltd., India

Company is providing on site repairs of major components of diesel engine, pumps, compressors and all type of rotary equipments mainly crankshaft, engine block, cylinder heads, liners. The repairs are undertaken by trained and experienced technicians equipped with latest breed of specially designed and developed portable machining equipments. Repairs are executed strictly as per the guidelines and tolerances stipulated by the manufacturers. Company is involved in supplying spare parts and supporting equipments used in diesel power plant. The parts and the supporting equipments are directly sourced from the OEMs and are competitively priced. White metal bearings are manufactured as per the drawing or sample. Rebabbitting of old bearing is undertaken by centrifugal process. The white metal used is sourced from the reputed companies and in house facilities for quality checks are in place.

For more details regarding onsite crankshaft grinding, in situ crankshaft grinding machine, rebabbitting of bearing, engine overhauling, and engine block repair, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.