Insitu Crankpin Machining

Sulzer model 6RTA Engine was reported damaged in high seas near Mombasa on a transit to Sri Lanka. On investigation, it was observed that the connecting rod bolts got sheared damaging lower and upper engine block and three crankpins of the Crankshaft.

Team of RA Power Solutions technicians having experience of undertaking in-situ crankpin machining and a team undertaking repair of crack and damaged engine block by metal stitching and metal locking process was deputed on board a vessel within a short notice as all of them have a seamen passport.

Repair of Engine Block by Metal Stitching Process
Repair of Engine Block by Metal Stitching Process

On preliminary examination multiple cracks on upper and lower crack case of engine block were observed measuring in totality 2900 mm in terms of length. Three crankpins were damaged developing taper and ovality exceeding more than 1 mm. RA Power Solutions team of technicians worked non-stop and executed the repair of crankpins by onsite crankshaft grinding machine. All pins were undersized to 1.5 mm due to the damage.

Grinding of Crankpin on Board a Vessel
Grinding of Crankpin on Board a Vessel
Crankpin After Grinding by Crankshaft Grinding Machine
Crankpin After Grinding by Crankshaft Grinding Machine

 

 

 

 

 

 

 

The engine block cracks were repaired by metal locking and metal stitching process. The complete job was executed within 68 hours. The hard work, knowledge, experience, sincerity of technicians have been very much appreciated by the owners. This achievement was possible due to RA Power Solutions having latest design of equipment, experienced technicians having Indian CDC.

For more information, please email us on info@rapowersolutions.com

Crankshaft Grinding Machine for Small Diameter

Onsite grinding of crankshaft without removing it from the engine block is undertaken by taking the reference of radius fillet.

The onsite crankshaft grinding machine is placed on both side of the radius of the crankpin and tool rotates undertaking grinding and polishing of crankshaft. This process of crankshaft grinding by in-situ crankshaft grinding machine is successful generally for the diameter of the crankpin of 200 mm and above having a bearing width of 125 mm minimum.

Crankshaft Grinding Equipment from 30 mm Diameter
Crankshaft Grinding Equipment from 30 mm Diameter
Insitu Crankshaft Grinder
Insitu Crankshaft Grinder

 

 

 

 

 

For the smaller diameter of the crankpin, it is not possible to undertake the grinding by taking the reference of radius fillet due to the space constraints.

RA Power Solutions has introduced a compact, easy to operate onsite crankshaft grinding machine which is suitable for grinding and polishing of small diameters of the crankpin above 30 mm. The crankpin bearing width can be as small as 30 to 40 mm. With this latest technological advance crankshaft grinding machine, it is easy to grind the smaller diameter of the crankpin having smaller crankpin bearing width.

Onsite Grinding Machine for Small Diameter
Onsite Grinding Machine for Small Diameter

The crankshaft grinding machine has the main features of machining, grinding and polishing of the crankpin. The tolerances in terms of taper, ovality, surface finish are maintained far better than the manufacturer’s recommendation.

RA Power Solutions having 4 decades of experience in in-situ crankshaft grinding have executed successfully repair of more than 11,000 crankshaft all over the world and are leaders in this field.

For your requirement of portable onsite crankshaft machine, you may write us on info@rapowersolutions.com

Turbine, Rotor and Alternator Shaft Grinding and Polishing

Failure of bearing due to over load or accident results to development of taper and ovality on turbine, alternator, rotor shaft. In certain cases the deep bearing line marks are developed and bearing surface becomes rough. This needs to be corrected.

Repair of Turbine and Alternator Shaft
                    Repair of Turbine and Alternator Shaft

RA Power Solutions undertake grinding and polishing of crankshaft, rotor shaft, turbine shaft, alternator from last 4 decades. We are the leaders in extending the grinding and repair services. The main features of turbine, alternator, rotor shaft grinding and polishing are as following:

I) Initial inspection of turbine, alternator, and rotor shaft is undertaken by experienced technicians. They carry all latest instruments to check dimensions, hardness, surface roughness, crack detection, taper and ovality. It is of great importance that proper inspection by Qualified and Experienced Engineer is conducted.

II) Latest breed of turbine, alternator, rotor shaft grinding and polishing equipment is available with us having capacity up to 700 mm diameter.

Grinding & Repair of Crankshaft After Major Accident
Grinding & Repair of Crankshaft After Major Accident

III) Onsite grinding and polishing equipment used by RA Power Solutions is light and compact. Easy to carry to site and can be fitted on the damaged diameter of turbine, alternator and rotor shaft. It is important as minimum dis assembly of the parts is required.

IV) The turbine, alternator, rotor shaft grinding equipment is capable of maintaining close tolerance even up to 20 microns with surface finish of 0.15 Ra value which is far better then the international standard.

V) All the repairs of turbine, alternator, and rotor shaft are executed with guarantee.

RA Power Solutions also manufactures new white metal Babbitt bearing up to 1500 mm and rebabbitting of old bearings which get worn out or damage is done.

Grinding of RotorShaft
Grinding of RotorShaft
Grinding of Main Journal on Board a Vessel
Grinding of Main Journal on Board a Vessel

Crankshaft Grinding and Crankshaft Repair by Experienced Technicians

Crankshaft grinding and crankshaft repair are important for satisfactory performance of engine. RA Power Solutions Pvt. Ltd. has been undertaking crankshaft repair onsite by portable, light weight crankshaft grinding machine. The crankshaft repair is executed of crankshaft diameter ranging from 60 mm to 700 mm.

We have team of trained and dedicated technicians who are deputed to the site with crankshaft grinding machine along with necessary instruments. The crankshaft repair is undertaken without removing the crankshaft from the entablature.

The crankshaft grinding machine used to undertake crankshaft repair is of latest design having minimum vibrations. This facilitates our technicians to undertake crankshaft repair even while the vessel is sailing. The tolerance after crankshaft grinding and crankshaft repair is maintained within 10 to 20 microns in terms of taper and ovality.

Crankshaft Repair is in Process
          Crankshaft Repair is in Process

The repair of crankshaft and overhauling of engine while sailing of the vessel between two ports results to the considerable saving to the ship owners as there is no need of holding the vessel at port or anchorage.

The crankshaft repair executed by us is guaranteed for the satisfactory performance. As on date we have executed more than 10,000 repair of crankshaft all over the world.

Crankshaft Grinding of MAN Diesel Engine
Crankshaft Grinding of MAN Diesel Engine
Crankshaft Grinding of Wartsila Diesel Engine
Crankshaft Grinding of Wartsila Diesel Engine

 

 

 

 

 

 

 

For more information, please email us on info@rapowersolutions.com or call us on +91 – 124 – 437 8292 , +91 9213604692

Crankshaft Grinding

Crankshaft grinding is undertaken by RA Power Solutions having four decades of experience in repair of crankshaft. We have technicians who are trained in our workshop giving them the on job training for Grinding of crankshaft and repair of Crankshaft.

Crankshaft Grinding on Board a Vessel
Crankshaft Grinding on Board a Vessel

We use latest design of crankshaft grinding equipment which is vibration free and is capable to maintain close tolerances in terms of taper and ovality. Crankshaft grinding and crankshaft polishing is done in one setting thus reducing the time of crankshaft repair considerably.

Crankshaft Grinding Machine- Vibration Free
Crankshaft Grinding Machine- Vibration Free
Crankshaft Repair
Crankshaft Repair

 

 

 

 

 

 

 

Crankshaft grinding and crankshaft repair is also undertaken on board the vessel and while the vessel is sailing.

Crankshaft Repair by Portable Grinding and Polishing Machine

RA Power Solutions has four decades of experience undertaking grinding and polishing of crankshaft. We can undertake onsite grinding and polishing of crankshaft from 50 mm to 700 mm. Team of experienced technicians are deputed to the site with light weight, portable crankshaft grinding machine. The repair of crankshaft is done without removing the crankshaft from the engine block. This saves time and cost involved in disassembly of crankshaft, packing and transportation of crankshaft to the workshop.

Potable Crankshaft Grinding Machine
Potable Crankshaft Grinding Machine
Crankshaft Grinder
Crankshaft Grinder

 

 

 

 

 

 

 

Worldwide the repair of crankshaft in workshop is outdated. We depute our technicians all over the world with portable equipments for repair of crankshafts. The repair is executed strictly as per the manufacturer’s specifications and tolerances. The crankshaft repairs are guaranteed for satisfactory performance.

Repair of Crankshaft by Crankshaft Grinding Machine
Repair of Crankshaft by Crankshaft Grinding Machine
Crankpin After Grinding of Crankshaft
Crankpin After Grinding of Crankshaft

 

 

 

 

 

 

 

The recent introduction of vibration less portable onsite crankshaft grinding machine facilitates us to execute crankshaft repair while vessel is sailing.

Our technicians have seaman passports and they can board the vessel from one port and disembark from another port. Thus, saving the cost of anchorage or stay at port.

Crankshaft Repair on Board the Vessel
Crankshaft Repair on Board the Vessel
Offshore Grinding of Crankshaft is in Process
Offshore Grinding of Crankshaft is in Process

 

 

 

 

 

 

 

We also manufacture crankshaft grinders which are priced low and easy to operate. These revolutionary machines are recommended for shipping companies, repair workshop heavy engineering company, etc.

For more information, call us on +91 – 124 – 4378292 , +91 9213604692 or email us on rajshahani@rapowersolutions.cominfo@rapowersolutions.com

Crankshaft Repair on Board a Vessel by Experienced Engineers

RA Power Solutions Pvt. Ltd. can easily undertake crankshaft repair on board a vessel while it is sailing by using special equipments.

We can undertake crankshaft repair up to the diameter of 700 mm while the vessel is sailing in high seas in anchorage or at berth. This result to considerable saving for ship repairs as no time is wasted for crankshaft repair as it does not require any anchorage or berth.

Damaged Crankpin of MAN Marine Diesel Engine
Damaged Crankpin of MAN Marine Diesel Engine
Crack Detection by MPI Before Grinding
Crack Detection by MPI Before Grinding

 

 

 

 

 

 

RA Power Solutions having 37 years of experience have executed more than 10,000 jobs of repair of crankshaft successfully which is a record.

Crack Detection of Crank Pin
Crack Detection of Crank Pin
Crankshaft Repair Under Process
Crankshaft Repair Under Process

 

 

 

 

 

 

 

The crankshafts which have been even rejected by the manufacturers are successfully repaired by us using various process/special equipments which we are learned from our experience. All the repair of crankshaft executed by us is guaranteed for the satisfactory performance. The tolerances as stipulated in the manual are strictly maintained.

Most of our technicians have seaman book and they can sail to any part of the world.

Insitu Grinding of Crankshaft

Insitu grinding of crankshaft and polishing is offered by RA Power Solutions Pvt. Ltd. for last more than 3 decades. Our experienced technicians reach at site in minimum possible time with Insitu crankshaft grinding machine and undertake crankshaft repair without removing of crankshaft from the main engine.

Insitu Crankshaft Grinding in Process
Insitu Crankshaft Grinding in Process
Crankshaft Grinding
Crankshaft Grinding

 

 

 

 

 

 

 

The Insitu crankshaft grinding is undertaken by light weight portable Insitu crankshaft grinding machine which is operated pneumatically. The equipment is of latest design and is capable to maintain the close tolerance within 20 to 30  microns in terms of  taper and ovality. Onsite crankshaft grinding can also be undertaken while the vessel is sailing. This is possible due to continuous research and development done by our engineers to minimize the vibrations while the vessel is sailing.Our technicians hold valid seamen book and can sail if required.

 

Upper View of Crankshaft Grinding Machine
Upper View of Crankshaft Grinding Machine

The time required for repair that involves crank pin grinding and polishing of crankshaft is minimum due to the latest design of our crankshaft grinding equipment executed by experienced technicians.

We can undertake grinding and polishing of crankshaft up to 700 mm diameter and have executed more than 10,000 repairs in our 36 years of experience world wide.

Onsite Crankshaft Grinding Machine Ready for Dispatch
Onsite Crankshaft Grinding Machine Ready for Dispatch

 

Pneumatic Motor Mounted on Machine
Pneumatic Motor Mounted on Machine

 

 

 

 

Author of this blog is Raj Shahani, Managing Director of RA Power Solutions Pvt. Ltd. He has been working on crankshafts for last more than 36 years. The author had his training with leading crankshaft manufacturers like CKD Skoda in Pilsener Czech Republic , Sidenor in Spain, National Forge in Germany, etc.