With over 47 years of experience, we provide complete bearing repair solutions for ship owners, power plants, and maintenance companies worldwide.

Wärtsilä Engine Models We Support

We undertake the rebabbitting and repair of alternator/generator bearings for all major Wärtsilä engine models, including:

• Wärtsilä 18V32
• Wärtsilä 12V32
• Wärtsilä 12V38
• Wärtsilä 9L46
• Wärtsilä 9L32
• Wärtsilä 8L64
• Wärtsilä 9L64
• Wärtsilä 5L20
• Wärtsilä VASA 12V22
• Wärtsilä 46GD
• Wärtsilä B35:40V20AG2 (9.4 MW)
• And many other Wärtsilä marine and power plant engine models

Ship owners, power plants, and maintenance companies worldwide dispatch their damaged bearings to our Gurgaon facility for complete refurbishment. Each bearing is thoroughly inspected, rebabbitted with high-quality white metal, precision machined, and finished to the original shaft diameter and the manufacturer’s specified bearing clearances before being returned to the customer, ready for reliable service.

Wartsila B35:40V20AG2 (9.4 MW) | Alternator/Generator Bearing | Rebabbitting & Repair | White Metal

RA Power Solutions was approached by a power generation company based in Yekaterinburg, Russia, for the urgent repair and rebabbitting of Wärtsilä B35:40V20AG2 (9.4 MW) alternator/generator bearings.

The generator bearings were air-freighted to our Gurgaon facility for repair. The main dimensions of the generator bearings are as follows:

Rough Drawings | Wärtsilä B35:40V20AG2 | Alternator/Generator Bearings

1. Bearing No. 1 (Big)

2. Bearing No. 2 (Small)

Pre-Inspection of Alternator/Generator Bearings of Wartsila B35:40V20AG2 (9.4 MW)

Before commencing the rebabbitting process, the alternator/generator bearings underwent a comprehensive inspection and preparation procedure in accordance with standard engineering practices.

i) The bearings were thoroughly cleaned, and the damaged white metal lining was completely removed from the inner diameter (ID).

ii) The bearing shells were subjected to shot blasting to remove oxidation, contaminants, and residual babbitt, ensuring a clean surface for rebabbitting.

iii) Hardness testing and Magnetic Particle Inspection (MPI) were carried out to detect any cracks or defects. The inspection results were found to be within acceptable limits.

iv) The alternator/generator bearings were rebabbitted at our Gurgaon facility using state-of-the-art centrifugal casting equipment. The new white metal lining was cast and subsequently precision machined to maintain the inner diameter (ID) and bearing clearances strictly in accordance with the client’s drawings and the original manufacturer’s specifications.

Procedures Adopted for the Rebabbitting of Alternator/Generator Bearings of Wärtsilä B35:40V20AG2 (9.4 MW)

a) The existing white metal was removed from the bearings. A metallurgical test was conducted to determine the grade of the metal used. It was ensured that the same grade, or a higher grade, of white metal was used for rebabbitting as originally present in the bearings.

b) We used only high-quality white metal imported from a leading manufacturer in Spain.

c) After the removal of the white metal, the alternator/generator bearing shells were subjected to sandblasting to expose the base metal and create a suitable surface profile, ensuring excellent bonding between the base metal and the new Babbitt lining.

d) Magnetic Particle Inspection (MPI) was carried out to detect any cracks. Based on our experience, cracks can develop due to accidents or abnormal increases in operating temperature.

e) The hardness of the inner diameter (ID) of the alternator/generator bearings was checked. If any hard spots were detected, they were removed by localized grinding or using the “scooping” technique.

f) Rebabbitting was carried out using a centrifugal casting system, ensuring a uniform white metal lining with proper metallurgical bonding.

g) The Babbitt surfaces were precision machined and polished to a mirror finish, and a protective wax coating was applied prior to delivery.

h) After rebabbitting, ultrasonic testing (UT) was carried out to detect any internal defects or abnormalities.

These procedures were followed during the rebabbitting of the alternator/generator bearings of Wärtsilä B35:40V20AG2 (9.4 MW), ensuring superior metallurgical bonding, dimensional accuracy, reliable performance, and extended service life under demanding operating conditions.

Common Causes of Wärtsilä Alternator Bearing Failure

Alternator bearings generally fail due to one or more of the following reasons:

• Continuous heavy-duty operation
• Fatigue of the white metal lining
• Development of taper and ovality
• Rotor shaft misalignment
• Low lubricating oil pressure
• Blocked lubrication passages
• Oil contamination
• Excessive operating temperature
• Rotor imbalance
• Foundation or bedplate distortion
• Sudden electrical load fluctuations
• Improper maintenance practices

Early inspection and professional rebabbitting can significantly extend bearing life while eliminating the need for costly replacement.

Worldwide Customer

RA Power Solutions has successfully repaired and rebabbitted Wärtsilä alternator bearings for customers located in:

• Russia
• Iran
• Iraq
• South Africa
• Nigeria
• South America
• Southeast Asia
• Middle East
• Europe
• Africa

Our workshop is authorized to receive damaged bearings from customers worldwide for repair and return shipment after refurbishment.

On-Site Shaft Repair Services

In addition to bearing rebabbitting, RA Power Solutions also specializes in onsite crankshaft repair, insitu crankshaft grinding, crankshaft polishing, shaft journal restoration, and alignment services, providing complete rotating equipment repair solutions under one roof. Our services have been successfully executed for customers across Europe, the Middle East, Africa, Southeast Asia, South America, and many other regions, making us a trusted global partner for critical engine and alternator maintenance.

Onsite Repair of Shaft Bearing Seating

If the alternator or generator shaft bearing seating (journal) is damaged, our experienced technicians can be deputed to the vessel or power plant to undertake the following:

• In-situ grinding of the bearing seating.
• Precision polishing to restore the journal surface finish.
• Dimensional inspection and alignment checks.
• Restoration of the shaft to acceptable operating tolerances, minimizing downtime and eliminating the need for shaft replacement.

Why Choose RA Power Solutions?

With decades of experience and specialized equipment, RA Power Solutions delivers cost-effective, high-quality repair solutions that extend the service life of critical rotating equipment while reducing maintenance costs and downtime.

RA Power Solutions Pvt. Ltd is one of the world’s leading specialists in the repair, rebabbitting, and refurbishment of Wärtsilä alternator and generator bearings. Our advanced repair technology, experienced engineering team, stringent quality control procedures, and global service network ensure that every repaired bearing delivers reliable performance and an extended service life.

For detailed information about Wärtsilä alternator/generator bearing rebabbitting, white metal bearing repair, onsite crankshaft repair, insitu crankshaft grinding, crankshaft polishing, and shaft journal restoration, please connect with us at:
Email: rajshahani@rapowersolutions.com | info@rapowersolutions.com

Phone: +91 9582647131 | +91 9810012383

The post Wärtsilä B35:40V20AG2 (9.4 MW) | Alternator/Generator Bearings | Rebabbitting appeared first on Rebabbitting Bearing.

Repair of Wartsila Generator Bearing

We received an old, damaged generator bearing from one of our clients based in Russia. The bearing had developed ovality, and the white metal was also chipped off. The rebabbitting of bearing was undertaken, and the final diameter was maintained as per the Wartsila alternator shaft.

The following are the main dimensions of the Wartsila Generator Bearing.

The following features have been adopted:

a) The white metal was removed from the bearings. A metallurgical test was done to determine the grade of the metal used.

b) We import and use only white metal from a leading manufacturer based in Spain.

c) After removal of the white metal, the bearing shell was subjected to sandblasting of the base metal surface to bare metal to create an acceptable coarse finish and attain excellent bonding with the Babbitt metal.

d) A magnetic particle test was done to check for cracks. It is our experience that cracks can develop in case of any accident or abnormal increase in temperature.

e) Hardness on the inner diameter of the bearing shall is checked. In case any hard spots are observed, they are removed by localized grinding or “scooping” technology.

f) The rebabbitting is done by a centrifugal system, which will ensure a uniform deposit of white metal with proper bonding.

g) Surfaces of the Babbitt is machined and polished to a mirror finish and applied with protective wax upon delivery.

h) After rebabbitting and machining, an ultrasonic test is done to check for any abnormalities.

Developing and manufacturing bearings as large as 1500 mm in diameter is no small feat. It speaks volumes about RA Power Solutions’ expertise in metallurgy, precision engineering, and quality control. These bearings are crucial for ensuring smooth operation and longevity in industrial machinery, where performance and reliability are paramount.

RA Power Solutions undertakes rebabbitting white-metal bearings for power plants, marine engines, and heavy industries in over 100+ countries. After 47+ years, the business has perfected the entire rebabbitting process, from removing worn white metal to precise machining and final inspection. Before rebabbitting, bearings are stripped, metallurgically examined, sandblasted, and cracked and hard spot checked. Centrifugal casting ensures homogeneous bonding of premium imported Babbitt metal, followed by precise machining to client tolerances by RA Power Solutions. Ultrasonic and non-destructive testing verify each bearing’s mirror finish. One of the few firms globally that can handle large and crucial bearing jobs with guaranteed quality and fast turnaround, they can repair and produce bearings up to 1500 mm in diameter on-site or in-house.

For more information on white metal bearings, rebabbitting of bearings, bearing repairs, please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs

The post Wartsila Generator Bearing Repair/Rebabbitting appeared first on Rebabbitting Bearing.