Crankshaft Polishing Archives - Connecting Rod Repair

In Situ Crankshaft Grinding Machine | Onsite Crankshaft Grinding & Polishing Machine | Crankshaft Grinder – RA Power Solutions

The in situ crankshaft grinding and crankshaft repair machine is a unique invention and is of great assistance to the shipping companies as they can not remove the crankshaft from the vessel and send it to the workshop for repair. Again, the crankshaft grinding machines installed in the workshop are not an ideal solution due to its high cost and lack of know-how to operate. RA Power Solutions manufactures and exports onsite crankshaft grinding and repair machines having a range of 35 mm to 700 mm in terms of the diameter of crankpin and main journal of the crankshaft.

Crankshaft Grinding Machine of Bigger Diameter

Crankshaft Grinding Machine has the following features:

Onsite crankshaft grinding and polishing machine is compact, lightweight, and can be inserted from the inspection window of the engine block.
It is simple in design, easy to operate, and maintain
Crankshaft grinding and polishing machine body is manufactured out of titanium steel having the property of absorbing the vibrations. With the vibration or almost zero vibration machine can also be used for crankshaft grinding and crankshaft repair while sailing of the vessel.
- All parameters and tolerances as recommended by the engine manufacturer can be strictly maintained.
With the use of onsite crankshaft grinding and polishing machine, repair can be done in one setting. Thus saving the time.
This crankshaft grinding and polishing machine is manufactured with a pneumatic or electrical drive depending on the client’s requirement.
On Job training for the operation and maintenance of the crankshaft grinding machine is extended through our experienced technicians.
Crankshaft repair machine is supplied in a toolbox and can be transported all over the world.

**Onsite Crankshaft Grinding & Repair Machine**

We have sold more than 70 crankshaft grinding machines all over the world that includes shipping companies, leading repair workshops and power plants, etc.

The author of the blog is Mr. Raj Shahani, Managing Director of the company. He is having 40 years of experience in solving the major issues related to repair and overhauling of engines, grinding and repair of the crankshaft, and many more related to the high capacity engine.

For more information regarding onsite machining of crankshaft, in situ crankshaft grinding repair, crankshaft grinding machines, onsite crankshaft grinding, and crankshaft polishing equipment, please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

**Repair of Crankpin by Crankshaft Grinding Machine**

**Onsite Grinding Machine for Small Diameter**

RA Power Solutions manufactures in situ crankshaft grinding and polishing machine. It is a revolutionary, lightweight, easy-to-operate, and compact crankshaft grinding and crankshaft polishing machine which can undertake the repair of crankpins up to the diameter of 700 mm without removing the crankshaft from the engine block. The in situ crankshaft grinding and crankshaft repair … Continue reading “In Situ Crankshaft Grinding Machine | Onsite Crankshaft Grinding & Polishing Machine | Crankshaft Grinder – RA Power Solutions”

Crankshaft Grinding | Crankshaft Repair | Crankpin Grinding – RA Power Solutions

RA Power Solutions having experience of more than four decades has emerged as a leader in providing services for onsite crankshaft grinding, crankshaft repair, crankshaft polishing, and crankpin reconditioning in Asia, the Middle East, South America, Parts of Europe, and many countries all over the world. The technology and process used for crankshaft repair are of the latest design, which ensures that the quality after the crankshaft grinding and repair is maintained strictly as per the engine manufacturer’s specifications and tolerances.

**Repair of Crankpin by Portable Crankshaft Grinding Machine on Vessel**

The combination of the latest design of onsite crankshaft grinding machine possessed by RA Power Solutions and experienced technicians who have collectively repaired more than 10,000 crankshafts gives confidence to our clients for successful repairs of crankshaft once the job is entrusted to RA Power Solutions.

Following are the main abnormalities observed in the crankshaft which require crankshaft repair:

Bearing line marks and development of rough surface.
Damage of radius fillet, lubricating oil hole due to an accident.
Development of taper and ovality beyond the limits specified by the engine manufacturers.
Increase in hardness beyond the permissible limit due to overheating.
Cracks were observed on crank pins and the main journal.
Presence of watermarks and rough surface.

Crankshaft Grinding and Repair process followed by RA Power Solutions:

Dimensional inspection of the crankshaft in detail is undertaken by RA Power technicians
A hardness check of the damaged CR Pin or main journal of the Crankshaft is conducted.
Crack detection by MPI, dye penetrant, or ultrasonic crack detection is done.
Visual inspection

**Inspection of Crankpin Under Process**

**Inspection of Crankpin Before Grinding**

The inspection report in detail is studied by our senior technicians and the necessary planning for onsite repair is done. The onsite crankshaft grinding and polishing is undertaken by RA Power in the shortest possible time.

We also possess portable onsite crankshaft grinding machines which have minimum vibrations. This facilitates us to undertake crankshaft grinding and repair even while the vessel is sailing on the high seas.

**Grinding & Polishing of Crankshaft by RA Power Solutions**

After crankshaft grinding and repair, the final inspection reports are prepared by our technicians and submitted to clients for their records. RA Power also extends services for repair crankshaft, crankshaft refurbishment, engine overhaul and maintenance, metal stitching, rebabbitting of bearings, spares, etc.

**Crankpin After Grinding on Board a Vessel**

The author is Mr. Raj Shahani Managing Director of RA Power Solutions having experience of almost four decades of working on high-capacity diesel engines, crankshaft, turbines, and rotary equipment.

For more information regarding crankshaft polishing, grinding of crankshaft, onsite inspection of crankshaft, crankshaft grinding and repair, onsite crankshaft grinding and polishing services, and crankpin grinding, please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

RA Power Solutions having experience of more than four decades has emerged as a leader in providing services for onsite crankshaft grinding, crankshaft repair, crankshaft polishing, and crankpin reconditioning in Asia, the Middle East, South America, Parts of Europe, and many countries all over the world. The technology and process used for crankshaft repair are … Continue reading “Crankshaft Grinding | Crankshaft Repair | Crankpin Grinding – RA Power Solutions”

Portable Crankshaft Polishing Machine – RA Power Solutions

In case of bearing failure or continuous running of the crankshaft, it develops bearing line marks, pitting, or rough surfaces. This requires polishing of the crankshaft, crankpin, and main journal.

A revolutionary onsite portable crankshaft polishing machine has been introduced by RA Power Solutions Pvt. Ltd., which is portable, lightweight, easy to operate, and can be taken to the site. The polishing of the crankshaft and crankpin is possible without removing the crankshaft from the engine block. We manufacture the onsite crankshaft polishing machine for diameters ranging from 50 mm to 700 mm.

The use of a crankshaft polishing machine removes bearing line marks and pitting. It also improves the surface finish as required by the manufacturer.

We provide free training to customers for a duration of one week. During this time, our team explains and demonstrates the operation and maintenance of the crankshaft polishing machine.

The cost of the machine is kept low, as it is the company’s objective that nobody should spend an exorbitant amount on polishing and grinding the crankshaft anymore, and sending it to the workshop. More than 60 machines are sold all over the world.

**Close-Up View of Crankshaft Polishing Machine After Packing**

**Packing in Progress Insitu Crankshaft Grinding Machine**

Our team developed the crankshaft grinding and polishing machine through consistent and focused R&D. We also conducted field trials under various operating conditions.

The company aims to reduce the cost of repairing crankshafts. It also seeks to eliminate the outdated practice of sending crankshafts to workshops. For more information on crankshaft polisher, crankshaft polisher machine, crankshaft polishing tool, crankshaft polisher for sale, polishing crankshaft journals, crankshaft polishing, crankshaft grinding machine, and crankshaft polishing equipment — contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.comCall: +91 9582647131 / +91 9810012383

FAQs:

1. Can the crankshaft be repaired without removing it from the engine?

Yes, RA Power Solutions designed the in-situ crankshaft polishing machine to operate directly inside the engine block through the inspection window. The process eliminates the need to remove the crankshaft. This approach saves both time and cost.

2. How long does it take to repair a crankpin or main journal?

Typically, technicians complete a full in-situ repair—including inspection, setup, grinding, and final polishing—within 24 to 30 hours. The exact time depends on the extent of the damage.

3. What types of engines can this machine be used on?

The portable crankshaft polishing machine is suitable for marine engines, power plant generators, compressors, diesel locomotives, construction equipment, and mining machinery. It is also ideal for other heavy-duty engines. The machine works effectively for both land-based and shipboard applications.

4. What is the diameter range this machine can handle?

The portable polishing machine can service crankshafts with a diameter range from 35 mm to 700 mm. Custom solutions are available for crankshafts up to 1000 mm in diameter.

5. How precise is the machine in terms of finish and tolerance?

The machine achieves a surface finish as fine as 0.15–0.2 µm Ra and maintains dimensional tolerances within 0.01 to 0.025 mm, meeting or exceeding OEM standards.

In case of bearing failure or continuous running of the crankshaft, it develops bearing line marks, pitting, or rough surfaces. This requires polishing of the crankshaft, crankpin, and main journal. A revolutionary onsite portable crankshaft polishing machine has been introduced by RA Power Solutions Pvt. Ltd., which is portable, lightweight, easy to operate, and can … Continue reading “Portable Crankshaft Polishing Machine – RA Power Solutions”