Month: June 2019

Crankpin Machining | Crankshaft Journal Machining | Crankshaft Grinding Services – RA Power Solutions

RA Power Solutions is based in New Delhi, India, undertaking crankshaft machining for the last 47+ years. Crankshafts are repaired on site without removing them from the crankcase. In case of any damage to the crankshaft, crankpin, and leading journal, we can machine it and polish it to a standard undersize within the manufacturer’s specification and tolerances specified.

The main advantage of repairing a damaged crankshaft and crankpin journal onsite is the short repair timescale. It is also more cost-effective. There is no need to remove the crankshaft from the engine block, pack it, or send it to a workshop. Machining and polishing can be done directly on-site. At the same time, all the specifications and tolerances as per the engine manufacturer are maintained.

RA Power Solutions has a team of experienced engineers who can repair all types of defects in the crankshaft and make it reusable.

Our scope of work includes the following:

  1. Crankshaft, Crankpin Repair
  2. Crankshaft Journal Repair
  3. Crankshaft Repair
  4. Crankshaft Straightening
  5. Crankshaft Regrinding
  6. Crankshaft Polishing
  7. Crankpin Machining, Crankshaft Journal Machining

We can undertake the repair and polishing of crankshafts with diameters ranging from 35 mm to 700 mm. Our technicians can fly to any part of the world at short notice. As they carry with them the Indian CDC. The machining of the crankshaft, repair of spare parts, engine overhauling, and maintenance can also be undertaken while sailing the vessel.

Our portable, lightweight onsite crankshaft grinding machine is designed to generate minimum vibration. Thus, maintaining a high standard of quality in terms of surface finish, taper, and ovality. Since we offer repair of primary spares, maintenance, and overhauling of engines, spares, etc. We own one point of responsibility for the satisfactory performance of the engine in totality.

Onsite Crankshaft Repair by Portable Grinding Equipment
On-Site Crankshaft Repair by Portable Grinding Equipment

We are considered to be the cheapest in the market in comparison to the competitors based in Europe.

We also have engine crankpin bearings available in our stock for various engine models from Wärtsilä, MAN B&W, Sulzer, Yanmar, Daihatsu, MAK, Caterpillar, Cummins, Deutz, Mitsubishi, Allen, Himsen, and Niigata.

For more details on babbitt bearing, white metal bearing, crankshaft grinding services, engine block repair, main journal grinding, grinding of crankshaft, or crankshaft grinders, email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs

1. What is the difference between crankpin machining and crankshaft journal machining?
The crankpin is the part of the crankshaft connected to the connecting rod, and the main journal is the part of the crankshaft that is supported in the engine block through the main bearings. Crankpin machining is the process of restoring the crankpins, while crankshaft journal machining usually refers to machining the main journals. Both require precise control of the diameter, taper, ovality, and surface finish. 

2. What is crankpin machining?
Crankpin machining is the process of restoring a damaged or worn crankpin to the size and surface condition required. It can remove defects such as scoring, wear, taper, and ovality. Depending on the crankshaft condition, the crankpin can be machined to a standard undersized size, maintaining the required manufacturer specifications and tolerances.

3. What are the advantages of onsite crankshaft grinding?
The most important benefit is that the crankshaft does not need to be removed from the engine for repair purposes. This helps in reducing downtime and saving costs for transportation. The portable grinder can be used for machining and polishing the crankpins and journals to meet the specified requirements. It is particularly applicable for the repair of marine engines, generators, compressors, and pumps.

Crankshaft Reconditioning | Crankshaft Grinding Machine Exporter – RA Power Solutions

RA Power Solutions undertakes the repair of crankshafts having a diameter ranging from 35 mm to 700 mm. The concept of removing the crankshaft and sending it to the workshop for repair is now no longer valid, and the user gets the crankshaft repaired onsite.

During our working of more than forty-seven years on marine main, crankshaft reconditioning, auxiliary engines, and high capacity diesel generating sets installed in industry, power plants, etc., we have observed that while the maintenance schedule stipulated by the engine manufacturer in the maintenance manual is religiously followed, but no attention is paid to the crankshaft’s condition.

Even during the maintenance schedule of 25,000 to 30,000 hours of operation, maintenance agencies and officials connected with the day-to-day upkeep of the engine ignore the inspection of the crankshaft till the seizure of the bearing or any other major breakdown happens in the crankshaft.

Repair of Crankpin on Board a Vessel
Repair of Crankpin on Board a Vessel

We have experienced that irrespective of the metallurgy of the crankshaft and level of hardness after continuous operation of the engine, taper and ovality of the crankshaft, crankpin, and main journal are developed. The bearing surface becomes rough, and in some cases, bearing line marks, pitting, etc., are developed. Due to these abnormalities developed in the crankshaft, failure of the bearing and the crankshaft takes place. RA Power Solutions recommends that inspection procedures be followed to ensure satisfactory performance of the crankshaft and to save it from rejection.

  • During the periodic maintenance schedule, the crankpins and main journals of the crankshaft should be checked for the development of taper and ovality.
  • The dimensions of the crankpin, taper, and ovality should be well within the limits specified by the manufacturers. There should not be any presence of bearing line marks or pitting on the crankpin journals.
  • The profile of the lubricating oil hole and radius fillet should be checked visually. There should not be any loss of the original profile.
  • The hardness test and the crack detection test by MPI or dye penetrant are not required till the major failure of the bearing or accident takes place.
Inspection of Crankpin is in Process
Inspection of Crankpin is in Process
Inspection of Crankpin on Board a Vessel
Inspection of Crankpin on Board a Vessel
  • Checking of deflection of the crankshaft.
  • Positioning of crankshaft balancing weights. They should be tightened to a specific torque as per the manual.

In case the above preventive inspection is undertaken on-site without disassembly of the crankshaft, the user can avoid any major damage to the crankshaft.

On-site machining of crankpins and main journals has been made simple in this era of technological renovation. The concept of removing the crankshaft and getting the crankshaft machined in the workshop is no longer valid. The onsite crankshaft machining is undertaken to maintain strictly all the tolerances as specified by the manufacturer and stipulated in the maintenance manual.

Crankshaft machining is no longer the monopoly of a bunch of companies based in Europe and the UK. The availability of a portable, easy-to-operate crankshaft grinding machine has made it simple and easy to undertake the polishing and grinding of the main journal if required.

RA Power Solutions is a reputable and leading crankshaft grinding machine exporter and crankshaft reconditioner, known for its high-quality products and exceptional services. With a strong commitment to customer satisfaction, RA Power Solutions has gained a stellar reputation in the industry. Our state-of-the-art crankshaft grinding machines are designed to precision grind and polish crankshafts, ensuring optimal performance and longevity of engines.

Repair of Crankshaft by Portable Crankshaft Grinding Machine
Repair of Crankshaft by Portable Crankshaft Grinding Machine
Portable Crankshaft Grinding Machine
Portable Crankshaft Grinding Machine

RA Power Solutions has been extending onsite crankshaft inspection, main journal grinding, and crankshaft repair services for the last 47+ years, We have a team of trained and experienced technicians who can fly to your site on short notice, as all of them have valid CDC.

We also have engine crankpin bearings available in our stock for various engine models from Wärtsilä, MAN B&W, Sulzer, Yanmar, Daihatsu, MAK, Caterpillar, Cummins, Deutz, Mitsubishi, Allen, Himsen, and Niigata.

For any queries regarding crankshaft grinding, grinding of crankshaft, crankshaft grinding services, crankshaft grinding machine, onsite crankshaft grinding, insitu crankshaft grinding repair, crankshaft grinding and repair, Crankshaft Grinding Machine Exporter, onsite crankshaft grinding machine, grinding of main journals, polishing crankshaft journals and crankshaft grinders, please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Inspection of Crankpin After Grinding
Inspection of Crankpin After Repair
Crankpin After Grinding & Polishing by Crankshaft Grinding Machine
Crankpin After Grinding & Polishing by Crankshaft Grinding Machine

FAQs

1. What is a crankshaft grinding machine?

Crankshaft grinding machines are used to machine and restore crankpins and main journals with the highest precision. The portable machines grind and polish on-site to the required journal diameter, taper, ovality, radius profile, and surface finish.

2. What are the advantages of onsite crankshaft grinding?

The main advantage of onsite crankshaft grinding is that the crankshaft can stay in place and does not need to be taken out and sent to the workshop. This minimizes the time for dismantling, transportation, repair, and downtime. The crankshaft can be inspected, ground, and polished on board the vessel, at the power plant, or at the industrial site.

3. What does crankshaft reconditioning mean?

Crankshaft reconditioning is the process of restoring worn or damaged crankpins and main journals to proper size. Includes taper and ovality inspection, grinding, polishing and correction. The crankshaft is reconditioned to OEM specifications.

4. Can you recondition a crankshaft without removing it from the engine?

Yes. Crankshaft reconditioning can be done on site with portable crankshaft grinders. The machine is built directly on the crankshaft and allows one to machine the crankpins and main journals without removing the entire crankshaft from the engine.