RA Power Solutions introduced mobile in situ machining services to cut repair costs and save time by avoiding disassembly, removal, and transport of shafts to workshops. We machine all types of cylindrical shafts and crankshafts up to 700 mm in diameter. We maintain tolerances according to the manufacturer’s requirements.

Advantages of Mobile Machining of Cylindrical Shaft and Crankshaft Onsite:

1. We use advanced technology and processes for the machining of cylindrical shafts and crankshafts.
2. Onsite machining equipment is portable and can be taken all over the world by our technicians.
3. Customization of onsite machining tools is possible according to the specifications of the shaft and site requirements.
4. Crankshaft Grinding Mobile Services machining minimizes the downtime and cost of the repairs.
5. Mobile machining is of great advantage to the plants as we are available 24*7 and can fly to any part of the world on short notice.
6. All our technicians experienced and trained in our in-house training school.
7. We have 45 years of experience. We regularly provide mobile machining services to leading companies across the world.
8. We design mobile machining equipment to undertake machining of damaged crankshafts in main and auxiliary engines installed on vessels.
9. Mobile machining is also possible while sailing of the vessel.

For more information regarding crankshaft machining, cylindrical shaft machining, and Crankshaft Grinding Mobile Services, please contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.

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We were approached by a shipping company based in Mumbai, India, to whom we have been extending on site crankshaft grinding and Onsite Crankshaft Repair services for the last 45 years.

They approached us about the problem in the crankshaft of the YANMAR Diesel Engine model 6N18AL-DV.

THE ENGINE DETAILS ARE AS FOLLOWING:-

ACTION TAKEN BY RA POWER SOLUTIONS FOR REPAIR OF CRANKSHAFT OF YANMAR DIESEL ENGINE 6N18AL-DV:-

• Two technicians with an onsite crankshaft grinding machine boarded the vessel, and the crankshaft was subject to inspection.
• All six crankpins were subject to calibration for taper and ovality.

THE DIMENSIONS WERE CHECKED AS PER RA POWER SOLUTIONS PROTOCOL, WHICH IS MENTIONED BELOW:-

STANDARD DIMENSION OF CRANK PIN – 145.00 MM

STANDARD /SPECIFIED NO.                                                                                        SIZES IN MM

                                                                             SIZE OF CR PINS

• We inspected the hardness of all crankpins. The readings ranged from 590 to 650 HB.
• We carried out an MPI test on the crank pins to detect cracks. The test showed no cracks.
• We checked the deflection of the crankshaft. The readings were within limits.

SUCCESSFUL REPAIR OF CRANKSHAFT OF YANMAR DIESEL ENGINE 6N18AL-DV:-

• We observed higher ovality ranging from 0.16 to 0.22 mm. Based on this, we decided to grind all the crank pins.
• We ground all the crankpins undersize by 0.40 mm as per the manufacturer’s recommendation. The final size ranged from 144.58 to 144.60 mm. We maintained a maximum ovality of 0.02 mm..

THE FINAL DIMENSIONS MAINTAINED AFTER GRINDING ARE MENTIONED BELOW:-

STANDARD DIMENSION – 145.00 MM

STANDARD /SPECIFIED NO.                                                                                        SIZES IN MM

                                                                             SIZE OF CR PINS

Precision Repair of Yanmar Diesel Engine Crankshafts

The small crankpin bearing width requires the latest crankshaft grinding equipment which is possessed by us and we have been executing successfully the repair of the crankshaft of YANMAR Diesel Engine 6N18AL-DV and other models having small bearing length all over the world.

In our 45 years of experience we have executed successfully repair of more than ten thousand Crankshafts.We strictly maintain all tolerances stipulated by the manufacturer.

We have been executing the repairs in Laos, Lebanon, Malaysia, Maldives, Mongolia, Nepal, North Korea, Oman, Philippines, Qatar, Russia, Saudi Arabia, Singapore, South Korea, Sri Lanka, Syria, United Arab Emirates, Yemen etc.

For more information on Onsite Crankshaft Repair, Yanmar Crankshaft Repair, onboard crankshaft repair, insitu machining equipment, crankpin journal repair, and ship crankshaft machining, contact us at rajshahani@rapowersolutions.com, info@rapowersolutions.com, or call us at +91-9582647131 or +919810012383.

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Necessity for Onsite Crankshaft Grinding and Polishing Machine

We observe that after continuous running of the engine and crankshaft, it is important to inspect the crankshaft for the following main parameters during a major engine overhaul:

1. To check the taper and ovality of the crankpin/main journal diameter.
2. To check the surface finish of the crankpin/main journal.
3. Inspection of hardness and the presence of cracks.
4. Visual inspection for radius fillet and lubricating oil hole.

If the crankpin or main journal deviates beyond the manufacturer’s limits, operators must grind and polish the crankshaft.. Hence there is a requirement of crankshaft grinding machine which is capable of maintaining the tolerances as stipulated in the manufacturer’s manual.

Change of Technology – In situ Crankshaft Grinding & Polishing Machine

In the past, operators always used bench-type crankshaft grinding machines. They installed these machines in a workshop and had to disassemble the engine, remove the crankshaft, pack it, and transport it to the designated workshop. This process is now outdated.

Technology has changed. Portable, lightweight, and easy-to-operate in situ crankshaft grinding and polishing machines have replaced heavy-duty, expensive bench-type machines. Operators no longer need to remove the crankshaft from the engine block, as they can grind and polish the crankpin or main journal onsite. They insert the machine through the inspection window.

Main Features of Revolutionary Onsite Crankshaft Grinding and Polishing Machine

1. Excellent on-site grinding equipment replaces the outdated heavy-duty bench-type crankshaft grinding machine.
2. The onsite crankshaft grinding and polishing machine is portable and operators can easily carry it onboard a vessel, to a power plant, or any installation worldwide
3. Easy to operate and easy to maintain.
4. We designed the on-site crankshaft grinding and polishing machine to maintain close tolerances in taper, ovality, surface finish, runout, and other parameters. All meet the manufacturer’s specifications.
5. Free onsite training in our workshop is provided.

Quality Aspect of In situ Crankshaft Grinding Machine

We are an ISO-certified company. We strictly follow all quality control norms during machine manufacturing.

Main body of the machine is manufactured out of titanium steel which has the inherent quality of absorbing the vibrations. This facilitates to undertake grinding and polishing of crankshaft even while sailing of the vessel. We subject every part to stringent inspection and improve metallurgical properties over time based on field trials and reports.

RA Power Solutions prices the in situ crankshaft grinding machine affordably for shipping companies, power plants, and engine repair workshops. The cost of an in situ crankshaft grinding and polishing machine is recoverable in two or three assignments. Stop paying exorbitant prices to European companies for the repair of the crankshaft and own a machine.

RA Power Solutions created the onsite crankshaft grinding and polishing machine from forty-five years of experience in this field

We are executing crankshaft grinding repair services in Bahrain, Kuwait, Oman, Qatar, Saudi Arabia, United Arab Emirates, Vietnam, UK, USA and other countries.

For any information on the latest technological onsite crankshaft repair machine, Crankshaft Grinding at Low cost,  crankshaft polisher machine, and onsite inspection of crankshaft, please email us at info@rapowersolutions.com, rajshahani@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

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