Inspection, Grinding & Polishing of Crankpin is in Process
RA Power Solutions offers top-notch crankshaft grinding services that are second to none in the industry. With years of expertise & state-of-the-art equipment, we specialize in the precise grinding of crankshaft, ensuring optimal engine performance and longevity. Our team of experienced technicians is well-versed in handling a wide range of crankshafts, from small engines to large industrial ones.
Whether it’s repairing a damaged crankshaft or enhancing its surface finish for improved functionality, RA Power Solutions is a trusted partner for all your crankshaft grinding needs. Our commitment to quality and efficiency makes us a preferred choice for clients seeking reliable & cost-effective crankshaft grinding services.
When it comes to crankshaft grinding services, RA Power Solutions stands out as a leader in the industry. We employ advanced grinding technology and a team of experienced professionals to deliver precision grinding solutions that meet the highest standards of quality and performance.
For more information on crankshaft grinding, crankshaft grinding machine exporter, crankshaft grinding for industrial and marine application, engine crankshaft grinding machine, or crankshaft grinding machine, contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.
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 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 situcrankshaft 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 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 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 In situ Crankshaft Grinding Machine
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.
RA Power Solutions is based in New Delhi, India, undertaking crankshaft machining for the last 40 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 the repair of the damaged crankshaft, and crankpin journal on site is that it requires a very short repair timescale. It works out to be cheaper to get the onsite crankshaft machined and polished as there is no need of removing the crankshaft from the block, packing and sending it to the designated workshop. At the same time, all the specifications and tolerances as per the engine manufacturer are maintained.
On-site Crankpin Machining
Crankshaft Grinding Services
RA Power Solutions has a team of experienced engineers who can repair all types of defects in the crankshaft and make it reusable.
We can undertake repair and polishing of crankshaft 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 responsibility for the satisfactory performance of the Engine in totality.
Grinding of Crankshaft is in Process
Onsite Crankshaft Repair by Portable Grinding Equipment
We are considered to be the cheapest in the market in comparison to the competitors based in Europe.
This blog is written by Mr. Raj Shahani (Managing Director of RA Power Solutions) who has more than forty years of experience in the field of crankpin machining, crankshaft journal machining, crankshaft grinders, polishing and grinding of crankshaft, etc. 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.
RA Power Solutions undertake crankshaft repair, crankshaft grinding and polishing onsite all over the world. The company is extending 24/7 emergency service for repair of crankshaft of main and auxiliary engines on board a vessel or for the land-based installations worldwide. We are having experience of 40 years in the field of engine repair and with the latest technology in the equipment, we are considered to be a most knowledgeable company in the world. Our response time in case of emergency is unbeatable. We have developed onsite portable, lightweight crankshaft grinding machine up to the diameter of 700 mm which is kept ready all the time to be taken on the vessel or to any Diesel Engine installation all over the world.
Grinding of Crankshaft is in Process
The client has the definite advantage of awarding crankshaft repair, crankshaft grinding, and crankshaft machining work to us as we have carried out repair of over 10000 crankshafts having serious damage and were saved from rejection. We are confident of our workmanship and design of equipment and can repair your shaft successfully without stripping it down from the engine and transporting it to the workshop.
The following procedure is adopted for successful repair of crankshaft:
Calibrated and modern instruments are used to undertake preliminary inspection of the crankshaft as follows:
Dimensional inspection to check taper and ovality
Crack detection by MPI/ultrasound or dye penetrant
Hardness test
Surface test to check surface roughness
Inspection to check the straightness of crankshaft
Lube oil and radius fillet profile check
Visual inspection
Inspection of Crankpin Before Grinding
Inspection of Crankpin on Board a Vessel
All the readings and observations are recorded in the inspection format, and onsite repair planning is done in consultation with our senior Engineer.
Grinding of Crankpin is in Process
After inspection, grinding and repair of crankshaft, the following parameters are achieved:
Taper and ovality of crankpin and main journal after grinding and polishing can be achieved within 0.02 mm.
Lubrication oil hole and radius fillet profile can be given as per the original profile.
Presence of crack and hardness readings are taken and recorded.
Straightness and runout are maintained as per the manufacturer’s specifications. Surface finish of less than 20 RA value can be maintained and achieved.
Inspection of Crankshaft After Grinding on Board a Vessel
Crankpin After Grinding
All the crankshaft grinding services, crankshaft repair, crankshaft grinding, and polishing jobs executed by RA Power Solutions are guaranteed for satisfactory performance. Price-wise, we are considered to be the lowest in the international market.
The author of the blog is Mr. Raj Shahani, Managing Director of the company. He is having 40 years of experience in providing engine repair services all over the world.
RA Power Solutions has now made it easy to undertake crankpin grinding, crankpin repair and crank pin polishing onsite in a short time with the lowest cost.
We undertake onsite crankpin repair, crankpin grinding and crankpin polishing of crankshaft diameter ranging from 30 mm to 700 mm. This is undertaken by lightweight, easy to operate and portable onsite crankshaft grinding machine which is taken to the site. We have team of experienced technicians having valid passport and CDC. They can travel to any destination in the world in the shortest possible time with portable crankshaft grinding equipment and can also undertake repairs while sailing of vessel. Following procedure is generally followed for successful onsite crank pin repair of crankshaft:
Crack Detection Test of Crankpin
Initial dimensional inspection of crankpin is undertaken by calibrated measuring instruments for taper, ovality and other parameters.
Radius fillet, lubricating oil hole of crankpin is checked for any loss of profile and damage.
Crack detection test by high-intensity MPI torch is undertaken by level 3 qualified technicians.
Hardness check and other important parameters are checked and recorded.
After the initial inspection, in case required grinding and polishing of crankpin is undertaken to maintain the tolerances strictly as per the manufacturer’s specifications.
The onsite crankshaft grinding machine used by RA Power Solutions engineers for grinding and polishing of crankpin and crankpin repair is self-designed and is improved from time to time.
Inspection of Crankpin is in Process
Onsite Inspection of Crankpin Before Grinding & Polishing
The combination of skilled technicians and the most modern onsite crankshaft grinding machine is used for crankpin grinding delivers and maintains the tolerances after crankpin repair which is better than the international standards and the tolerances specified by the engine manufacturers. Our company is having more than four decades of experience in successful repairs of the crankshaft of high-capacity engines used for power generation, shipping, etc.
Grinding & Polishing of Crankpin on Board a Vessel
RA Power Solutions also provides the following onsite repair services:
Machining and grinding of crankpin journals up to 700 mm diameter.
Grinding of main journals
Machining and grinding of crankpin fillets
Grinding and Machining of main journal fillets
Machining and grinding of intermediate shaft/tail shaft
Grinding and polishing of crankshaft, turbine shaft, alternator shaft, pump shaft
Author is Mr. Raj Shahani, Managing Director of the company. He is having 40 years of experience in providing onsite repair services related to high capacity engines across the world. He has designed and developed the portable crankshaft grinding machine to save time and money.
For more information regarding grinding of crankshaft, onsite crank pin repair, onsite repair services and crankpin repair, please free to write us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.
RA Power Solutions is known as a leader in offering onsite repair of crankshaft worldwide with forty years of experience in this field, the company’s endeavor is always to save the Crankshaft from rejection.
Crankshaft Grinding 550 mm diameter
The crankshaft meets with serious accidents and are even rejected by the European Repair Companies attended by RA Power Solutions and is successfully repaired. This is possible because of having technicians who have hands-on experience in repairing more than ten thousand crankshafts.
Crankshaft Grinding Mirrless Blackstone
Crankshaft Grinding Wartsila 18 V32
All crankshafts are initially checked and inspected to ensure that they are acceptable for reuse or for repair. The onsite crankshaft grinding and crankshaft polishing is undertaken through the window of the engine block. Due to continuous innovation in the design and technology of crankshaft grinding machines manufactured and used by us, it is possible to maintain the dimensional tolerances strictly as per the original equipment manufacturer. The crankshaft grinding and polishing are done in the minimum possible time. Thus, reducing the breakdown time of the equipment considerably.
Onsite Crankshaft Repair
Repair of Crankshaft MAN B&W
Presently, we are undertaking crank-pin and main journal grinding and repair up to 700 mm and are in the process of increasing the capacity up to 1000 mm. We undertake onsite crankshaft grinding of all popular makes of engine and their model. Few of them are as following-
Insitu Crankshaft Grinding
Offshore Grinding of Crankshaft is in Process
Wartsila 6R32, 12V32, 18v32, Mirrlees Black Stone ESL, MAJOR K series Generators, Ruston, Allen, Yanmar, MAN B&W, Daihatsu engine, etc. For more details on the marine crankshaft repair, crankshaft grinding machine, please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.
RA Power Solutions is having more than forty 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 diameter 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 of Crankshaft misguide the end users resulting to serious breakdown and considerable 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 exceeds the limit specified in maintenance manual of engine manufacturer. II) In case due to accident, deep line marks or depression is developed. III) Reconditioning of crankshaft is recommended in case higher hardness is observed due to seizer of bearings or any other reason. IV) Development of surface crack V) Loss of alignment. VI) In certain cases, although the dimensions of CR Pin and Main Journal are observed within the limit, but due to rough surface observed on CR Pin and of Main Journal, surface require polishing.
Crankpin Before Grinding
Above suggestions are given for reconditioning of crankshaft. It is always advisable to send photographs and brief Inspection report to RA Power Solutions for free recommendation as how to repair Crankshaft successfully.
Onsite Crankshaft Repair, Crankshaft Grinding, and Crankshaft Reconditioning is undertaken by RA Power Solutions for the last four decades. The company has technicians who are trained to undertake onsite crankshaft repairs strictly as per manufacturer’s specifications stipulated in the manual.
All technicians have valid CDC and can travel in a 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 to 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. Following checks are undertaken.
Repair of MAN Engine is in Process
Quality of a Re-Machined Pin or Journal
The quality of a pin or journal after machining has to meet 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 equivalent to Journal or Crank-pin 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 mean 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
Engine population is rapidly increasing for the shipping industry, power plants and various applications. In most of the cases engines are used not only for the emergency purpose but as a base load. The continuous running of diesel engine results to wear and tear of the crankpin and main journal of the crankshaft. In certain cases taper and ovality more than the permissible limit is developed in the crankpin and the crankshaft main journal.
Damaged Crankpin of Engine
Inspection of Engine Before Grinding
The disassembly of the crankshaft from the main engine and to send it to the designated workshop is a lengthy process. This is now outdated. RA Power Solutions having the experience of more than four decades in repair of crankshaft have developed a portable, light weight engine crankshaft grinding machine and onsite crankshaft grinding machine which can be taken to the site as accompanying baggage. The onsite crankshaft grinding machine has the following features:
Light in weight can be carried to the site easily.
Portable nature of onsite crankshaft grinding machine facilitates it to insert from the inspection window and undertake grinding and polishing of the crankpin.
Machine is designed and can maintain the taper and ovality within 0.02 mm. This meets with the OEMs tolerances.
Surface finish and other parameters can be maintained as per international norms.
Onsite crankshaft grinding machine is easy to operate
Onsite training is provided for smooth running of the crankshaft grinding machine.
More than 70 machines sold all over the world and performing satisfactory.
Insitu crankshaft grinding machines are low-priced and recommend for repair workshops, shipping and engineering companies, and power plants.
Inspection of Connecting Rod on Board a Vessel
Inspection of Engine is in Process
Crankshaft grinding machines are exported to various countries including Dubai, Singapore, Bangladesh, Indonesia, Greece, Qatar, Nigeria, South America, etc.
Crankpin grinding, and crankpin repair by in situ crankshaft grinding machine is offered by RA Power Solutions through a highly motivated team of technicians who have the experience of four decades in crankshaft grinding and crankshaft repair. It is important that the crankshaft is initially inspected by experienced technicians in order to detect the fault after the damage or accident.
Damaged Crankpin of Yanmar Engine
Inspection of Crankpin Under Process
The following are the major parameters that are examined before the repair of the crankshaft:
Minimum and maximum diameter of the crankpin and main journal, taper, and ovality is checked.
Run out of main journals and deflection readings are taken to verify the loss of alignment.
A complete non-destructive test using MPI and ultraviolet lamp for heat cracks is undertaken of crankpins and the main journal of the crankshaft.
The crankshaft is also subject to a hardness test.
Based on the preliminary inspection reports prepared by the technicians the repair procedure is planned. The onsite crankshaft grinding machine used for the crankshaft repair is lightweight and is placed on the damaged crank pin from the inspection window of the engine block. There is no requirement of removing the crankshaft from the Entablature and send it to the workshop as bench-type grinders are now outdated.
The crankshaft grinding and crankshaft polishing is undertaken to maintain taper and ovality, surface finish as per the OEMs requirement. RA Power Solutions have facilities to undertake in situ crankshaft grinding, crankshaft polishing, and repair of crankshaft up to the diameter of 700 mm without removing the crankshaft from the engine block.
Inspection of Crankshaft by Latest UV Torch
Crankpin Grinding of Diesel Engine While Vessel is Sailing
During and after the repairs, all the major technical parameters are checked and a calibration report is prepared. It is possible to execute the crankshaft grinding and crankshaft repair on board a vessel while it is sailing. Technicians have seaman passports and can travel to any part of the world in the shortest possible time, thus attending to the damaged engine in a short time. We are class-approved and stand to guarantee the satisfactory performance of the crankshaft after repairs.
Crankpin Grinding and Crankpin Polishing is in Process
