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

RA Power Solutions have been working on high-capacity diesel engine overhaul, repair, and maintenance and grinding of crankshaft for the last more than 40 years. During our work on engines on board a vessel or in large engineering plants, we have observed that the incidents of crankshafts getting damaged due to accidents are getting very often.

As we are aware that the crankshaft is the heart of the engine by means of connecting rod the crankshaft converts reciprocating motion to the liner movement which drives the engine. RA Power Solutions have the process, technology, and onsite crankshaft grinding machines ranging from 35 mm to 700 mm and crankshaft repair is now possible without disassembly of the crankshaft from the engine. The repair of the crankshaft is possible irrespective of its length and weight as we have the equipment available up to 700 mm in terms of diameter.

The crankshaft in general has various applications including diesel generating sets and marine engines typical areas of crankshaft applications are as follows:

  • Compressors
  • Railway vehicles/engines
  • Power generators
  • Forging hammers
  • Pumps
  • Marine engines, etc.
Crankpin After Accident
Crankpin After Accident
Crankpin After Serious Accident
Crankpin After Serious Accident

The crankshaft of high-capacity engines used for marine and land-based applications are of forged steel. RA Power Solutions has experienced technicians, and advanced technology equipment i.e. in situ crankshaft grinding machine to maintain the dimensions and tolerances strictly as per the manufacturer’s specifications and recommendations. Major parameters maintained after crankshaft grinding and repair and grinding of crankshaft are as follows:

  • Taper and ovality can be maintained within 0.02/0.03 mm or less as per the requirement of the engine manufacturer.
  • The portable in situ crankshaft grinding machine used by RA Power Solutions technicians is capable of maintaining a surface finish of far less than 0.03 RA value.
  • The high surface finish value after grinding of crankpin and main journal diameter of the crankshaft enhances the life of connecting rod and main bearings considerably.
Inspection of Crankpin Before Repair & Grinding
Inspection of Crankpin Before Repair & Grinding
Inspection of Crankpin is in Process
Inspection of Crankpin is in Process
  • The radius profile of both the end of the crankpin or main journal and the lubricating oil profile is maintained strictly as per the original profile.
  • The straightness/runout of the crankshaft is checked, and the crankshaft is straightened if required by the peening process.
  • Counterweight can be replaced in case of damage and supporting threads are repaired onsite.
Machining of Crankshaft by Insitu Crankshaft Grinding Machine
Machining of Crankshaft by In situ Crankshaft Grinding Machine

During our work of more than four decades, we have repaired more than 10,000 crankshafts used for different applications. All the repairs are executed with a guarantee. We are an ISO-certified company and also meet the standards requirements like DNB, Lloyd’s, etc. All our technicians possess Indian CDC and can join the vessel in a short time in any part of the world.

Crankpin After Repair by Insitu Crankshaft Grinding Machine
Crankpin After Repair by In situ Crankshaft Grinding Machine
Grinding of Crankpin is in Process
Grinding of Crankpin is in Process

Crankshaft grinding and repair are essential processes in the field of engine maintenance and precision engineering. The crankshaft, being a crucial component in any engine, requires meticulous attention to ensure its optimal performance. At RA Power Solutions, we specialize in main bearing machining, grinding of crankshaft, and in situ crankshaft grinding.

For more information regarding in situ crankshaft inspection, in situ grinding crankpins, and cost-effective crankshaft grinding Dubai contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

In Situ Grinding Machine | In Situ Crankshaft Grinding and Polishing Machine – RA Power Solutions

In situ crankshaft grinding machine is an ideal solution for repair of a damaged crank pin journal of diesel engine without dismantling of the crankshaft.

Benefits of In-Situ Grinding Machine:-

RA Power Solutions grinding technology and tools are not only user-friendly, but are also capable of grinding the crankshaft to close dimensional and with geometric tolerance. These grinding tools are portable and can be easily carried by technicians to the site.

Insitu Crankshaft Grinding Machine
In Situ Crankshaft Grinding Machine

Main Accessories of In-Situ Grinding Machine supplied by RA Power Solutions:

  • In situ grinding machine (Complete Set)
  • Mother Bush
  • Bush
  • Pneumatic Motor with Adapter
  • Hand valve
  • Hose Pipe
  • Hanging Pipe (G.I)
  • Pneumatic Hand Grinder
  • Mops, Mounting Wheel & Rubber Base Wheel
  • Consumables and grinding media
  • Tool Box (Complete Set)
Crankshaft Grinding Machine Packed in a Steel Box for Dispatch
Crankshaft Grinding Machine Packed in a Steel Box for Dispatch
Accessories for Insitu Grinding Machine
Accessories for In Situ Grinding Machine

The measuring instrument used in the Job of grinding and polishing of crankshaft:-

  • Micrometer (Depend on Crankshaft Crank pin and main journal Diameter)
  • Micrometer 0-25 mm outside Ball Type Micrometer
  • Inside micrometer or bore gauge
  • Hardness Tester
  • Deflection Gauge
  • Magnetic Dial Stand with Dial Gauge
  • DP Test Kit or MPI Test Machine
  • Radius Gauge
  • Filler Gauge
Portable Crankshaft Grinding Machine is Ready for Dispatch
Insitu Crankshaft Grinding Machine
In Situ Crankshaft Grinding Machine

Instructions for using on site crankshaft and cylindrical Grinding Machine:-

Inspection:

  • Check CR Pin Size, Hardness, DP Test, or Magnetic Particle Test and
  • Deflection, in case all reports are good after that, take Second Step.
  • Dismantle the machine and check all spare parts, assemble the Pneumatic Motor in insitu grinding machine.
  • Assemble the hardware in the shell and assemble the machine on the crank pin and rotate gear manually.
  • Assemble the machine upper and lower cap and recheck all bolts.
  • Connect Air Hose Pipe to Pneumatic Motor.
  • After machining process first round is complete, dismantle the in situ grinding machine and check size of Crank Pin.
  • Follow same step to complete job.
  • Before maintaining final size, check hardness, MPI or DP Test & take Maximum Reading by Micrometer.

Note: Before final size check, reset outside micrometer and take dimension again.

Maintenance & Cleaning:-

In order to properly maintain machine tool, it is very important to perform maintenance checks periodically of all accessories. The author is Mr. Raj Shahani, Managing Director of the company. He is having forty years of experience in providing onsite engine repair services to companies all over the world. After extensive research and field trials, he has developed in situ crankshaft grinding and polishing machine to make the repair process easy and cost-effective.

For any information on crankpin repair, in situ crankshaft grinding please feel free to write to us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or  +91 9810012383.