insitu crankshaft grinding repair Archives

Compressor Crankshaft Grinding and Polishing Onsite

RA Power Solutions was approached by a leading Fertilizer producing company based in north India regarding the requirement of onsite grinding and polishing of compressor crankshaft.

The company has five high-capacity CO2 compressors which have been imported from a leading company based in Europe.

Our team consisting of three technicians along with onsite crankshaft grinding equipment was deputed to the site and following was observed:

Details of CO2 Compressor Crankshaft:

S. NO	Crankshaft Details
1	Engine Make/ Model	CO2 COMPRESSOR
2	Crankpin Diameter Standard	317.30 MM
3	Crankpin Bearing Width	210.00 MM
4	Main Journal diameter	330 mm & 317.30 mm
5	Main Journal Width	370 mm & 225 mm
6	Place of execution of crankshaft repair	Fertilizers & Chemicals Plant in India

On dimensional inspection of crankpin it was observed that crankpin nos. 02 developed excessive ovality. It also had deep line marks due to the failure of bearings which are of babbitt white metal type.
All the remaining crankpins were inspected and rough surfaces including bearing line marks were observed.
The main journal having a standard diameter of 330 mm also had a rough surface and required polishing.

**Damage of crankpin no. 6 of Compressor**

**Onsite repair of damaged crankshaft of CO2 Compressor**

**Picture showing before polishing of Main Journal**

Action taken by RA Power Solutions

Considering the fact that the main journal having a diameter of 330 mm having a rough surface and bearing line marks it was decided to remove the crankshaft from the compressor.

RA Power Solutions technicians submitted a drawing of V-Block which were manufactured in the factory for placement of crankshaft.

The grinding of crankpin no. 02 was undertaken and the final dimensions were maintained between 315.58 mm to 315.60 mm. The ovality of only 0.02 mm was observed.

All the remaining 05 crankpins were polished, removing the line marks and improving the surface finish. The surface finish after polishing was observed at less than 15 RA value.

All the main journals were also polished onsite removing the ovality to some extent and improving the surface finish again to less than 15 RA value.

**Crack detection test of compressor crankshaft before grinding**

**CO2 Compressor Crankshaft Inspection and Repair on site**

Advantage of getting the crankshaft grinding/ Polishing done by RA Power Solutions

RA Power Solutions is the only company in India having experience of forty-three years in crankshaft repair.
We have ready availability of equipment up to 700 mm diameter. The equipment is portable and lightweight and can be taken to any site all over the world as accompanied baggage. The modification in the onsite crankshaft grinding and polishing equipment is possible as per the site requirement.
In this case since the main journal diameter was to be polished the V-Block was designed and fabricated onsite.
RA Power Solutions as a protocol undertakes all the checks prior to grinding and polishing like cracks by MPI, Hardness test, deflection, etc.
We also manufacture babbitt white metal bearings and do rebabbitting of old bearing up to 1500 mm diameter.

**After Grinding and polishing taken deflection of CO2 Compressor Crankshaft**

**Main Journal of CO2 compressor after polishing**

For more information on crankshaft grinding services, insitu crankshaft grinding and polishing, onsite crankshaft repair, or crankshaft polishing services email us at rajshahani@rapowersolutions.com, info@rapowersolutions.com Call at +91 9582647131,+91 9810012383.

Crankshaft Grinding Machine | Cylindrical Shaft Grinding and Polishing Machine | Crankshaft Grinding

RA Power Solutions is having more than forty years of experience in the field of repair, overhaul, and maintenance of high-capacity marine diesel engines installed on board the vessel and land-based diesel generating sets used for various applications. We are crankshaft specialists and have executed successfully onsite repair of crankshafts up to 700 mm diameter number exceeding more than 10,000 all over the world.

Cylindrical Shaft Grinding and Polishing Machine

Two decades back, RA Power Solutions developed and manufactured an onsite crankshaft grinding machine and onsite cylindrical shaft grinding machines having a range starting from 35 mm to 700 mm in terms of the diameter of the shaft on date more than 70 machines have been sold all over the world.

**Insitu Crankshaft Grinding Machine Ready for Dispatch**

**Accessories for Crankshaft Grinding Machine**

Our clients include companies providing services to industries and shipping companies, large industries, and workshops undertaking repairs of heavy equipment. The complete range of onsite crankshaft grinding machines and polishing machines is designed for high precision and a high volume of repair in a short duration.

It is a highly technological in situ grinding machine with a simple control system to deliver and maintain the international standards in terms of tolerances after grinding.

Construction of In Situ Crankshaft Grinding and Polishing Machine

The main casing of the onsite crankshaft grinding machine is made up of titanium steel which has a strong structure and high vibration absorption properties. This has been of great benefit, especially while undertaking grinding and polishing of crankshaft and all cylindrical shafts on board a moving vessel.

**Crankshaft Grinding Machine for Bigger Diameter**

The other benefits are as follows:

Keep the temperature constantly low
Reduce the vibration on the machine
Improvement in strength The advanced technique of the onsite crankshaft grinding machine makes grinding and polishing very easy

The in situ crankshaft grinding & polishing machine has the following capabilities:

Range starting from 35 mm to 700 mm which covers crankshaft of most popular engines and their models.
Lightweight, compact, and easy to carry to any destination.
Easy to operate and maintain.
Does not require any day-to-day maintenance.
The crankshaft Grinding Machine is designed to maintain tolerance within 10 to 20 microns depending on the diameter of the shaft.
RA value with the Surface finish of fewer than 0.2 micrometers is achieved.
Compact nature of in situ crankshaft grinding and polishing machine facilitates to enter from even the smallest inspection window of the engine block.
Vibration is less and with a low noise level.
No heat is generated, easy to operate.
Free onsite training is provided for the operation of in situ crankshaft grinding and polishing machines.
Machine can be operated round the clock.
Options Available for Pneumatic Drive or Electrical Drive.
Highly recommended for crankshaft rebuilding, Cylindrical shaft grinding, and polishing.

**Assembly of Crankshaft Grinding Machine with Pneumatic Motor**

The insitu crankshaft grinding and polishing machine is supported with complete data on crankshafts of popular makes and models of the engine giving the diameter, bearing width, and all the important parameters which are required for grinding of the crankshaft. The onsite crankshaft grinding and polishing machine is priced low and can be recovered in 2-3 grinding assignments.

For any details on crankshaft grinding, cylindrical shaft grinding and polishing machine, or crankshaft grinding machine manufacturers, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Crankshaft Grinding | Crankshaft Repair Services

RA Power Solutions undertakes onsite crankshaft grinding and crankshaft repair for the diameter ranging from 30 mm to 700 mm.

The small diameter crankshaft is repaired on site without removing the crankshaft from the block. These services are of great use for the engines which are installed in construction-related equipment, compressors, and diesel-driven equipment operating in remote areas.

Our crankshaft repair services of crankshaft grinding and crankshaft repair are proven as we have been extending these services all over the world for the last forty years.

The main feature of onsite crankshaft grinding, onsite crankshaft repair, crankshaft polishing are as following:

RA Power design and manufactures on site crankshaft grinding equipment as per the site requirement and space constraints Hence there is no compromise with the quality after the repair of the crankshaft.
All the parameters of the crankshaft grinding are maintained strictly as per the manufacturer’s recommendations and tolerances. An inspection report in detail is submitted to the client.
In RA Power Solutions, we give great importance to the calibration of the crankshaft and inspection in detail by experienced technicians which helps us to plan the right strategy and selection of the right equipment for onsite grinding and onsite repair of crankshaft.
We possess the latest breed of inspection instruments including the instruments for the NDT test which helps us to find out the exact fault in the crankshaft resulting in successful repairs.
Replacement of crankshaft in case of breakdown by new crankshaft or reconditioned crankshaft is our expertise. The crankshaft of an auxiliary engine can also be replaced while sailing the vessel.

**Inspection of Crankpin is in Process**

**Grinding of Crankpin by Crankshaft Grinding Machine is in Process**

Our services for crankshaft grinding and repair are available 24*7. Technicians can fly down with portable lightweight crankshaft grinding machine in short notice to all over the world as they carry Indian CDC.

We have been regularly working for various models of engines like Wartsila, Daihatsu, MWM, Caterpillar, MaN, MaK, B&W, Sulzer, Bergen, Detroit Diesel, Stork Werkspoor, Pielstick, Deutz, Yanmar, MTU, Cummins, Nohab Polar, Caterpillar, Mitsubishi, Yanmar, MaK 551, MaK 552, MaK 453, MaK 451 AK, MaK 452 AK, Deutz 540, Deutz 358, Deutz 350, Pielstick PC 2.2 PC 2.5, Wartsila 524, Wartsila 824 TS, Sulzer 6 AL 25/30 and many more.

For more details regarding crankshaft grinding please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

**Crankshaft Grinding Service on Moving Vessel**

Insitu Grinding of Crankshaft | Crankshaft Machining Insitu

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

Insitu Crankshaft Grinding in Process — **Grinding of crankshaft**

Onsite Crankshaft Grinding Machine Ready for Dispatch

The In situ crankshaft grinding is undertaken by a lightweight portable In situ crankshaft grinding machine which is operated pneumatically. The equipment is of the latest design and is capable to maintain a 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 books and can sail if required. 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 crankshafts up to 700 mm diameter and have executed more than 10,000 repairs in our 36 years of experience worldwide. RA Power Solutions specializes in providing top-notch crankshaft machining in situ services.

The 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 43 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.

For more updates on in situ crankshaft grinding, on site crankshaft grinding, grinding of crankshaft, in situ crankshaft grinding repair, onsite crankshaft machining, and crankshaft machining in situ email info@rapowersolutions.com, rajshahani@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.