Grinding of Crankshaft Archives - Connecting Rod Repair

On Site Crankshaft Repair of HIMSEN HYUNDAI 6H 17/28 | Turkey

RA Power Solutions successfully repaired the Crankshaft of Himsen Hyundai 6H17/28 engine at MIP Mersin, Turkey. The engine, owned by an Italian company, experienced a major breakdown due to a failure in one of its auxiliary engines.

RA Power Solutions promptly deployed two skilled technicians equipped with onsite crankshaft grinding tools. The repair was efficiently conducted while the vessel remained anchored at MIP Mersin, ensuring minimal downtime and reliable restoration of the engine.

Following are the major Engine and Crankpin details:

S. No.	Engine and Crankpin Details
1.	Engine Make	HIMSEN HYUNDAI
2.	Engine Model	6H 17/28
3.	Crankpin Diameter Standard	175.00MM
4.	Crankpin Bearing Width	60.00 MM
5.	Place of Execution of Grinding of Crankpin	MIP Mersin, Turkey
6.	Name of Shipping Company	Reputed Company from Italy

Key Observations of the Crankshaft:

Visual Inspection Findings:
(i) The breakdown was caused by the failure of the lubricating oil pump, resulting in damage to all connecting rod bearings.
(ii) Bearing material was embedded on all six crankpins and was meticulously removed.
(iii) Dimensional inspection conducted after polishing revealed taper and ovality measurements ranging from 0.22 mm to 0.86 mm.

MPI Test Before Crankshaft Grinidng and Repair

Image Showing Before Grinding and Polishing

The Dimensional Inspection Report of Six (6) Number Crankpins of HIMSEN HYUNDAI 6H 17/28:

SIZE OF CR PINS BEFORE REPAIR
	A	Aa	C	Cc	B	Bb	Min	STD	Ovality
CR-1	174.74	174.85	174.62	174.73	174.66	174.88	174.62	175.00	0.38MM
CR-2	174.83	174.92	174.80	174.78	174.83	174.93	174.78	175.00	0.22MM
CR-3	174.70	174.90	174.55	174.69	174.48	174.54	174.48	175.00	0.52MM
CR-4	174.78	174.88	174.79	174.72	174.79	174.92	174.72	175.00	0.28MM
CR-5	174.78	174.88	174.76	174.92	174.72	174.78	174.72	175.00	0.28MM
CR-6	174.22	174.80	174.14	174.78	174.37	174.85	174.14	175.00	0.86MM

(iv) Hardness testing indicated acceptable levels overall, with minor exceptions in a few areas, which were assessed as non-critical.
(vi) Magnetic Particle Inspection (MPI) revealed minor hairline cracks, while all other parameters remained within acceptable limits.

CR Pin Before Grinding of HIMSEN HYUNDAI 6H 17/28

Actions Taken by RA Power Solutions Technicians:

1. The grinding of all six (6) crankpins was undertaken by our insitu crankshaft grinding machine.
2. Three (3) number of crankpins diameter was reduced by 1.00 MM and the final size was maintained as 174.00 MM.
3. Three (3) number of crankpins diameter was reduced by 1.50 MM and the final size was maintained at 173.50 MM.

Final Report After Grinding is Pasted Below:

SIZE OF CR PINS AFTER REPAIR
	A	Aa	C	Cc	B	Bb	Min	U/S	Ovality
CR-1	173.48	173.49	173.49	173.48	173.50	173.50	173.48	173.50	0.02MM
CR-2	173.98	173.99	174.00	173.99	173.98	173.99	173.98	174.00	0.02MM
CR-3	173.49	173.50	173.50	173.48	173.49	173.50	173.48	173.50	0.02MM
CR-4	173.98	173.99	173.98	174.00	173.98	174.00	173.98	174.00	0.02MM
CR-5	173.99	173.99	173.98	174.00	173.98	173.99	173.98	174.00	0.02MM
CR-6	173.48	173.49	173.49	173.50	173.50	173.48	173.48	173.50	0.02MM

We ensure all six crankpins are maintained with a stringent tolerance of 0.02 mm, delivering exceptional accuracy and optimal performance in every project.

Global Expertise in Crankshaft Repair
RA Power Solutions is a global leader in onsite crankshaft repair and grinding services. With extensive experience, we have successfully completed projects across the globe, including Dubai, Fujairah, Qatar, Saudi Arabia, Oman, Iraq, Togo, Malta, Freetown, Egypt, Malaysia, Iran, Indonesia, Vietnam, Jordan, and many other locations.

CR Pin Grinding of HIMSEN HYUNDAI — **CR Pin After Grinding of HIMSEN HYUNDAI**

Our highly skilled technicians are available 24/7 and can be deployed at short notice. Many of our team members hold valid US visas, allowing us to serve clients in South America, the Caribbean, and other regions efficiently.

Get in Touch for Professional Crankshaft Services:
Email: rajshahani@rapowersolutions.com | info@rapowersolutions.com
Phone: +91 9582647131 | +91 9810012383.

RA Power Solutions successfully repaired the Crankshaft of Himsen Hyundai 6H17/28 engine at MIP Mersin, Turkey. The engine, owned by an Italian company, experienced a major breakdown due to a failure in one of its auxiliary engines. RA Power Solutions promptly deployed two skilled technicians equipped with onsite crankshaft grinding tools. The repair was efficiently … Continue reading “On Site Crankshaft Repair of HIMSEN HYUNDAI 6H 17/28 | Turkey”

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

Crankshaft is a mechanical and important part of the engine that facilitates the performance of a conversion between reciprocating motion and rotational motion. The tolerances of the crankpin and main journal of the crankshaft are generally very close in order to have a longer life and continuous satisfactory performance of the Crankshaft without any damage. It is important that crankshaft tolerances are always maintained strictly as per original tolerances.

RA Power Solutions designs and manufactures insitu crankshaft grinding and polishing machine. The insitu crankshaft machine is of advanced technology which is designed to maintain the crank pin and main journal tolerances in terms of taper, ovality, and surface finish strictly as per the manufacturer’s specifications. There is no need of disassembly /removal of the crankshaft from the entablature. The onsite crankshaft grinding and polishing machine manufactured by RA Power Solutions is available in the range of 35 mm to 700 mm in terms of diameter.

**Onsite Crankshaft Grinding Machine Ready for Dispatch**

**Accessories of Grinding Machine Packed in Steel Box**

The onsite crankshaft grinding machine is light in weight and can be easily taken to far from places all over the world. The onsite crankshaft grinding and polishing machine has the following features:

Technologically advanced crankshaft machining equipment in comparison to the conventional and old cage-type design, which is outdated.
Onsite crankshaft grinding and polishing machine does not require any reference of radius fillet for machining of the crankpin/main journal of the crankshaft.

**Packing of Crankshaft Grinding Machine is in Process**

Onsite crankshaft grinding and polishing machine frame is made out of titanium steel, which is robust and vibrationless.
With our latest onsite crankshaft grinder, machining of crankshaft up to 700 mm diameter can even be done while sailing the vessel, maintaining the close tolerance.
Onsite crankshaft grinding machine capable of maintaining close tolerance within 0.02 mm and with high surface finish far better than the international standards.
The insitu crankshaft grinding machine manufactured by RA Power Solutions can also be used for cylindrical shaft grinding and polishing and for the repair of the alternator, rotor shaft, pump shaft, intermediate shaft, mid-shaft, and turbine shaft.
Insitu crankshaft grinding and polishing equipment is easy to operate and maintain. It does not require any complicated day-to-day maintenance.
We are giving free training to the client’s technicians for the operation of this latest onsite crankshaft grinding equipment.

**Accessories Used in Crankshaft Grinding Machine**

The cost of insitu crankshaft machining equipment is low and affordable. Highly recommended for large diesel power plants, shipping companies, and engine repair workshops. Insitu crankshaft grinding equipment is supplied in sturdy steel boxes that can be easily stored and taken from one site to another.

**Training on Operation of Crankshaft Grinding Machine**

We have sold more than 70 crankshaft grinding machines all over the world including South America, UK, Italy, Nigeria, Singapore, the Philippines, Iran, Dubai, and various countries.

The author of this blog is Mr. Raj Shahani (Managing Director of Company). He has four decades of experience in the field of high-capacity engine repair and grinding of shaft. He has developed an onsite crankshaft grinding machine to make the grinding process easy and less time-consuming. With the development of grinding equipment, now companies can undertake grinding and repair of any rotary shaft themselves saving a huge amount of money and time.

For information regarding onsite crankshaft grinding & polishing machine, on site machining services, onsite crankshaft machining, contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

**Onsite Grinding of Crankpin by Crankshaft Grinding Machine**

Crankshaft is a mechanical and important part of the engine that facilitates the performance of a conversion between reciprocating motion and rotational motion. The tolerances of the crankpin and main journal of the crankshaft are generally very close in order to have a longer life and continuous satisfactory performance of the Crankshaft without any damage. … Continue reading “In-Situ Crankshaft Grinding Machine | Onsite Crankshaft Machining | Onsite Crankshaft Grinding & Polishing Machine – 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”

Grinding of Crankshaft in Oman by RA Power Solutions

**Onsite Crankpin Grinding is in Process**

A vessel sailing near Oman reported serious breakdown of auxiliary engine of Yanmar model 6N18AL. RA Power Solutions team which is always ready for emergency response left for Oman and conducted the detailed inspection of the engine. It was observed that crankpin no. 4 bearing seized, resulting in the damage of CR pin no. 4. All other crankpins also developed ovality to the extent of maximum 0.20 mm.

RA Power Solutions having 40 years of experience in field of crankshaft ginding and repair services has achieved many land marks and have performed more than satisfactory for the clients spread all over the world. The expert team of crankshaft grinding technicians can undertake the grinding of crankshafts up to 700 mm.

**Crankpin Grinding by Onsite Crankshaft Grinding Machine**

All the parameters like taper, ovality, surface finish, etc. after crankshaft grinding are maintained strictly as per the manufacturer’s specifications. RA Power Solutions undertakes all the jobs related to repair, maintenance, overhauling of high capacity of diesel engines and diesel generating sets onsite all over the world. The only company which has undertaken repair of more than 11,000 crankshafts and is highly respected for its commitment.

For more information about our services for crankshaft grinding machine for engine repair, crankshaft grinding machine supplier, insitu machining crankshaft repair, onsite crankshaft machining and polishing, onsite crankshaft machining service, grinding of crankshaft, and crankshaft repair please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

A vessel sailing near Oman reported serious breakdown of auxiliary engine of Yanmar model 6N18AL. RA Power Solutions team which is always ready for emergency response left for Oman and conducted the detailed inspection of the engine. It was observed that crankpin no. 4 bearing seized, resulting in the damage of CR pin no. 4. … Continue reading “Grinding of Crankshaft in Oman by RA Power Solutions”

Crankshaft Repair While Sailing – RA Power Solutions

Crankshaft repair by grinding and polishing is now possible while vessel is on move. RA Power Solutions Pvt. Ltd. is the first company to offer crankshaft repair services while vessel is sailing by onsite portable crankshaft grinding equipment which is taken on board the vessel. The crankshaft repair is undertaken by a vibration-free Crankshaft grinding machine without removing the crankshaft from the engine block thus saving time and cost.

RA Power Solutions Pvt. Ltd. undertakes onsite crankshaft grinding and polishing on board the vessel while sailing up to 700 mm diameter.

RA Power Solutions Pvt. Ltd. has recently undertaken grinding of all 6 CR pins of MAN B&W STX 6L23/30H while sailing of the vessel between ports of Malaysia and Indonesia. The crankpins were damaged due to a lack of lubrication oil and all the pins were undersized by 0.5 mm. The tolerances after grinding and polishing have been maintained as per the manufacturer’s requirements.

RA Power Solutions Pvt. Ltd. has designed vibration-free onsite crankshaft grinding and crankshaft polishing equipment by which it is possible to execute crankshaft repair while the ship is on move. This saves time and keeps the vessel moving. Crack repair of engine block, cylinder heads, casing, and all broken castings on board a vessel is possible while sailing. We are the first company to introduce these services.

For more information about our services for grinding of crankshaft, crankshaft grinding, crankshaft repair, and restoring crankshaft of compressor please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Onsite Crankshaft Grinding Machine from Engine Block

Crankpin Ready After Grinding and Polishing

Crankshaft Polishing in Process by Crankshaft Polishing Machine

Crankshaft repair by grinding and polishing is now possible while vessel is on move. RA Power Solutions Pvt. Ltd. is the first company to offer crankshaft repair services while vessel is sailing by onsite portable crankshaft grinding equipment which is taken on board the vessel. The crankshaft repair is undertaken by a vibration-free Crankshaft grinding … Continue reading “Crankshaft Repair While Sailing – RA Power Solutions”