Crankshaft Reconditioning | Crankpin Reconditioning and Machining | Onsite Crankshaft Grinding & Polishing – RA Power Solutions

RA Power Solutions is a pioneering name in the realm of onsite machining services. With a commitment to precision and excellence, they offer a comprehensive suite of solutions aimed at addressing complex machining challenges without the need for equipment dismantling.

RA Power Solutions undertakes complete reconditioning of the crankshaft of marine engines, diesel generating sets, compressors, forging hammers, and all other applications. The crankshaft repair is undertaken onsite without removing the crankshaft from the crank casing. This saves the downtime of the equipment and cost of assembly of the engine after the crankshaft repairs are executed, in fact, companies are opting for on site repair of crankshaft, and sending the crankshaft to the workshop for repair is outdated.

**Grinding & Repair of Crankpin on Board a Vessel**

The following procedure is adopted by our experienced engineers for calibration:

Prior to starting, the repair of the crankshaft, crank pin, and main journals are subject to the following inspection:

Crankpin and main journal are measured for the presence of taper and ovality.
The alignment of the crankshaft is checked by deflection.
Radius fillets and lubricating oil holes are inspected for their original profile.
Inspection of hardness
Crack detection by MPI/Ultrasound and dye penetrant test.
Checking of surface finish
Visual inspection of counterweight and counterweight bolts. In case of an accident, crack detection by MPI is recommended.

**Inspection of Crankpin is in Process**

Based on the above observations, the crankshaft is repaired onsite maintaining the following parameters:

The grinding of crankpin and the main journal is undertaken as per the undersize recommended by the manufacturers and the availability of the bearings with the engine manufacturers.
Preparation of radius fillet, lubricating oil hole, and maintenance of profile as the original.
Polishing the crank pin and main journal, maintaining the surface finish as per international standards.
Checking of hardness and crack detection test after repairs are executed.

We have a team of experienced technicians and the necessary instrumentation to undertake the repair of the crankshaft on board a vessel, even while sailing or for stationary engines.

All the crankshaft repairs, onsite crankshaft inspection, and onsite machining services undertaken by RA Power Solutions are guaranteed satisfactory performance.

The author of the blog is Mr. Raj Shahani, Managing Director of the company. He has 44 years of experience in providing services related to engine repair and overhauling, crankshaft grinding and polishing, crankpin reconditioning, and many more.

For any queries regarding crankshaft grinding for industrial and marine applications, crankshaft regrinding and compressor large engine, crank grinding, main journal crankshaft grinding, crankshaft grinding machine manufacturer, on-site grinding, onsite machining, onsite crankshaft grinding, onsite crankshaft inspection, and onsite machining services, please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131,+91 9810012383.

Grinding & Repair of Crankpin — **Repair of Crankshaft by Portable Crankshaft Grinding Machine**

Grinding and Polishing of Crankshaft | Repair of Crankshaft | Crankshaft Reconditioning – RA Power Solutions

RA Power Solutions with an experience of forty years provide you with a team of experienced technicians who repair crankshaft onsite, overhaul and maintenance of diesel engine, metal stitching, grinding and polishing of crankshaft, and all the repair jobs related to the engine room on a vessel or land-based diesel power plants. We possess precision and the latest design of equipment to execute the repairs strictly as per international norms and maintain the tolerances stipulated by the manufacturer.

**Crankshaft Grinding & Polishing in Diesel Power Plant**

Crankpin Machining by Onsite Crankshaft Grinder

RA Power Solutions is the only company that designs its own tooling according to the space available at the site which helps us to grind and maintain the crankshaft tolerances as per the manufacturer’s specifications. The main advantage of onsite machining and onsite reconditioning of crankshaft is that there is no need for striping down the equipment which in most of the cases is not possible due to various restrictions.

RA Power Solutions being an Indian company execute the repair of the crankshaft on the lowest prices in comparison to the European companies who used to dictate their prices and conditions without compromising on quality.

The onsite crankshaft repair services are extended to all types of industries: petrochemical, offshore and mining, steel, cement and manufacturing plant, marine and sugar plants, etc. We are confident of our quality and have executed repairs of more than 10,000 crankshafts worldwide. We have saved many crankshafts from rejection. Clients can also avail of our consultancy services which after inspection of the crankshaft advise the various methods of repair of crankshaft on site.

**Repair of Crankpin by Specialized Tooling due to Space Constraints**

We also provide services related to engine repair i.e. turbine shaft repair, alternator shaft repair, pump shaft repair, grinding and polishing of crankshaft, onsite machining, crankshaft machining, crankshaft grinding & polishing, propeller shaft repair, metal locking & metal stitching of engine block, rebabbitting of bearings, connecting rod repair, etc.

The author is Mr. Raj Shahani, Managing Director of RA Power Solutions Pvt. Ltd. He has 40 years of experience in working on large crankshafts and Diesel Engines.

For more information regarding the grinding and polishing of crankshaft, crankshaft polisher machine and crankshaft reconditioning please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Crankshaft Reconditioning | Crankshaft Machining | Crankshaft Repair | Crankshaft Grinding – RA Power Solutions

RA Power Solutions has forty-four years of experience in crankshaft reconditioning of large marine engines and engines installed in Power plants.

Diesel Engine Ready for Grinding & Repair

The onsite crankshaft repair and grinding is undertaken by RA Power Solutions’ experienced technicians for diameters ranging from 30 mm to 700 mm, which cover almost all the crankshafts used for different applications. It is generally observed that due to non-experience or lack of knowledge of the companies undertaking crankshaft reconditioning, Crankshaft misguide the end users resulting in serious breakdown and considerably higher expense.

Onsite Grinding of Crankpin by RA Power Solutions

RA Power Solutions has undertaken reconditioning of crankshaft exceeding ten thousand numbers and recommends the following situation for reconditioning of the crankshaft.

Recommendation for reconditioning of Crankshaft:

I) It is recommended to undertake crankshaft repair in case taper and ovality exceed the limit specified in the maintenance manual of the engine manufacturer.
II) In case of an accident, deep line marks or depression are developed.
III) Reconditioning of the crankshaft is recommended in case higher hardness is observed due to the seizer of bearings or any other reason.
IV) Development of surface crack.
V) Loss of alignment.
VI) In certain cases, although the dimensions of the CR Pin and Main Journal are observed within the limit, due to the rough surface observed on the CR Pin and of the Main Journal, the surface requires polishing.

The above suggestions are given for reconditioning of crankshaft. It is always advisable to send photographs and a brief Inspection report to RA Power Solutions for free recommendations as to how to repair Crankshaft successfully.

Contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383 for more information.

**Grinding of Crankpin by Onsite Crankshaft Grinding Machine**

**Crankpin After Onsite Grinding & Repair**

Onsite Crankshaft Repair | Crankshaft Grinding | Crankshaft Reconditioning- RA Power Solutions

Onsite Crankshaft Repair, Crankshaft Grinding, and Crankshaft Reconditioning have been undertaken by RA Power Solutions for the last forty-four years. The company has technicians who are trained to undertake onsite crankshaft repairs strictly as per the manufacturer’s specifications stipulated in the manual.

All technicians have valid CDC and can travel on short notice anywhere in the world to board the vessel. The onsite crankshaft repair and onsite crankshaft grinding equipment used by RA Power Solutions has a main structure manufactured out of Titanium steel, which results in absorption of Vibration while the onsite crankshaft grinding machine is in operation in high seas with turbulence. The quality after the reconditioning and repair of crankshaft is of Great Importance and is maintained. The following checks are undertaken.

Quality of a Re-Machined Pin or Journal

The quality of a pin or journal after machining has to meet the following requirements:

Geometrical tolerance in accordance with manufacturer specifications.
A blueing check has to be carried out on the re-machining surface. Blueing Shells: Min. Width is equivalent to Journal or Crankpin dimensions, respectively. Min. Length is equivalent to 1/5 of the Journal or crank-pin circumference.
Required contact area: Min 35% equally distributed over width and circumferences.
Free of hairline cracks: Journal or crank pin to be tested by means of Magnetic Particle crack detection method.
Free of Martensite: The microstructure is to be tested for edged areas of martensite structure will replicas or micro etching with 5% nitric acid in alcohol (Nital) applied to the pin after polishing.
The maximum admissible hardness of remaining local hardsports: However, such local hardsports are not tolerated around the fillets and the bores for lubrication.

**Onsite Grinding & Repair of Crankpin is in Process**

**Onsite Repair & Grinding of Crankshaft**

For more information about onsite crankshaft repair and grinding, crankshaft grinding, onsite crankpin grinding, etc. Please contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.