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 | 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**

Crankshaft Repair | Crankshaft Grinders | Onsite Crankshaft Machining

RA Power Solutions undertakes the Grinding of Crankshaft of High Capacity Engines used in Shipping companies, Power plants, and in various other sectors. The company has experience of more than forty years in undertaking successful repair of Crankshafts and major components. As we are aware Crankshaft is the heart of the engine and is the most expensive part with limited availability of particular make and model.

Our expertise lies in the repair of crankshafts that meets with a serious accident like a Seizure of a bearing. It is generally observed that due to rubbing of the bearing steel surface with the CR Pin diameter, excessive heat is generated. Thus there is an increase in Hardness. Every manufacturer specifies the maximum limit of Hardness.

Damaged CrankPin of Mirrlees Blackstone Engine

In the case of Mirrlees Blackstone K and KV, major series of engines, the normal hardness at the time of manufacturing of the crankshaft is between 21.5 to 26 on HRC Scale (241 to 268 on the HB scale). It is obvious that after the seizure of the bearing, the hardness increases even to the level of 45 to 50 HRC.

The Mirrlees Blackstone allows the higher hardness under a deviation maximum of up to 32 HRC against the standard of a maximum of 26 HRC. In normal situations as per the manufacturer, the crankshaft stands rejected as it has far higher Hardness than the stipulated in the manual.

Field Instruction for Crankshaft Rehabilitation of Mirrlees Blackstone Engine

RA Power took the following action to save the Crankshaft.

The Hardness was taken on various spots, not having a gap of more than 15 mm.
Hardness was recorded and a maximum hardness of 50 HRC was observed.
Since bearing line marks, taper, and ovality on the crank pin were observed, the grinding was undertaken and CR Pin dia was reduced by 3.5 mm approx.
The Hardness was reduced and the maximum Hardness of 42 HRC was observed in a few spots. Although the 42 HRC Hardness was on the higher side than the maximum limit of 32 HRC specified by the manufacturer. The Crankshaft was accepted under deviation due to the following reasons:
1. The higher Hardness was observed in a scattered pattern.
2. The higher hardness was away from the Lubricating Oil Hole and radius fillet of the CR Pin which are considered to be critical Zone.

The versatility of RA Power Solutions crankshaft grinders caters to a wide range of marine and industrial crankshafts, irrespective of their size and design.

The Crankshaft was accepted and his performance is observed as satisfactory from last more than three and half years. The saving of the Crankshaft from rejection was possible only due to the Experience RA Power Solutions has of successful repair of more than ten thousand crankshafts.

RA Power Solutions undertakes Crankshaft Repair, Crankshaft Grinding and offers Onsite Crankshaft Machines to repair companies. We are a leading provider of crankshaft grinding and repair services, specializing in utilizing state-of-the-art crankshaft grinders.

With our state-of-the-art crankshaft grinders and highly skilled technicians, we can accurately recondition damaged or worn-out crankshafts to the original manufacturer’s specifications. By using advanced techniques and precision machinery, RA Power Solutions ensures that the repaired crankshafts regain their perfect alignment, surface finish, and dimensional integrity. Whether it’s a large marine engine or a compact generator, their expertise and commitment to quality make them a reliable choice for any crankshaft-related concerns.

With the use of RA Power Solutions crankshaft grinders, a significant decrease in downtime and repair costs can be achieved, allowing businesses to maintain productivity and efficiency.

Note: The writer of this article is Mr. Raj Shahani, Managing Director of RA Power Solutions Pvt Ltd.

Grinding & Repair of Crankpin is in Process

Finished Crankpin after Grinding & Repair

For more details on in situ crankshaft grinding and repair, crankshaft grinders, crankshaft grinding repair services, or crankshaft machining contact today by email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Crankshaft Grinding Services by Experienced Technicians – RA Power Solutions

When it comes to maintaining marine engines, one vital aspect that deserves the utmost attention is the crankshaft. The crankshaft plays a crucial role in converting linear motion to rotational motion, and any wear or damage to this component can lead to a significant decrease in engine performance. However, thanks to the expertise of experienced technicians and specialized services like Crankshaft Grinding, marine engine owners can revitalize their crankshafts and restore optimal engine functionality. In this blog, we will delve into the significance of crankshaft grinding services and how they can breathe new life into your marine engines.

RA Power Solutions provides onsite crankshaft grinding services for last four decades. Crankshaft having diameter up to 700 mm is repaired onsite without removing the crankshaft from the engine block.

The grinding of crankshaft onsite is possible by introduction of onsite crankshaft grinding machine which is portable, light weight and can be inserted from the inspection window of the engine block. RA Power Solutions also manufactures and sells crankshaft grinding machine. The crankshaft grinding services are offered by us through our technicians who are well trained in our workshop and have experience of providing crankshaft grinding services for last 30 to 35 years. After repair of crankshaft, the dimensional tolerances are maintained within 20 to 30 microns and surface finish as per the international standards.

Prior to undertaking grinding of crankshaft, all the major parameters of crankshaft i.e. dimensional inspection, hardness test, crack detection, deflection, etc. are checked.

In case the basic parameters are found within the repair limits, crankshaft grinding is undertaken. RA Power Solutions can maintain the tolerances strictly as per the manufacturer’s recommendations. With the introduction of latest design of onsite crankshaft grinding machine the vibrations in the crankshaft grinding machine are reduced to minimum. This ensures maintenance of close tolerance and also facilitates grinding of crankshaft on board a vessel while it is sailing in high seas. The grinding of crankshaft while sailing of the vessel results to the considerable saving to the owners.

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

Crankshaft Repair on Board a Vessel by Experienced Engineers – RA Power Solutions

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.

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

Damaged Crankpin of MAN Marine Diesel Engine

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.

For more details regarding in situ crankshaft grinding, crankshaft repair on board a vessel and onsite crankshaft repair please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Crankshaft Repair in Low Cost – RA Power Solutions

RA Power Solutions Pvt. Ltd. provides crankshaft repair without dismantling of crankshaft from the engine block.

The crankshaft repair on site is cost-effective with minimum downtime.

We are Indian company based in New Delhi with 37 years of experience in repair of crankshaft. We are cost-effective and considered to be most experienced organization. The crankshaft repair of large industrial engine, marine engine, compressor, and rotatory equipments is executed irrespective of its location. We are equipped with latest design of crankshaft repair machines which are compact and lightweight.

The crankshaft repair grinders have minimum vibrations, thus the close tolerances of crankpin and main journal diameter can be maintained after grinding and polishing.

Crankshaft Repair On Land, Anchorage or at Sea

Crankshaft repair services up to diameter of 700 mm are extended for land-based engine, vessel on anchorage, or vessels on move in high seas. Our technicians are trained and experienced to work in any condition with the latest design of crankshaft grinder.

Crankshaft Repair on Land. — Crankshaft Repair on Land

The onsite repair of crankshaft considerably reduces the cost of repairs, reduces the downtime when every minute of breakdown means a lot of inconvenience and loss of revenue.

Crankshaft repair covers following activities:

Crankshaft Straightening
Main Bearing Journal grinding/ Polishing/Superfinishing
Crankshaft Grinding/ correction of lub oil and radius profile
Crankshaft Journal Repair
Orbital Crankpin Machining/Regrinding
Crankshaft Keyway Repair
Main Bearing Machining
Crankpin inspection ie hardness, crack check etc
Crankshaft Polishing
Crankshaft peening
Main Bearing Regrinding
Crankshaft Machining

Crankshaft Repair of Hyundai Diesel Engine

If you are in need of crankshaft grinding or repair services, please contact RA Power Solutions today for crankshaft grinder Dial +91 9582647131 or +91 9810012383 and email info@rapowersolutions.com, rajshahani@rapowersolutions.com.