Wärtsilä B35:40V20AG2 (9.4 MW) | Alternator/Generator Bearings | Rebabbitting
RA Power Solutions Pvt. Ltd., Gurgaon, India, is a globally recognized company specializing in the rebabbitting (white metal lining), repair, and refurbishment of large alternator and generator bearings used in Wärtsilä marine engines and power plants.
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:
| Bearing No. 1 (Big) | ||
| S.NO | Description | Standard Dimensions with Tolerance as Per Drawing |
| 1 | Bearing Inner Dia (Bore) | 250.00 (0.03) |
| 2 | Bearing Outer Diameter | 507.00MM |
| 3 | Bearing White Metal Width | 250.00MM |
| 4 | Bearing Total Width | 263.00MM |
| Bearing No. 2 (Small) | ||
| S.NO | Description | Standard Dimensions with Tolerance as Per Drawing |
| 1 | Bearing Inner Dia (Bore) | 225.00 MM |
| 2 | Bearing Outer Diameter | 412.00 MM |
| 3 | Bearing White Metal Width | 212.00 MM |
Rough Drawings | Wärtsilä B35:40V20AG2 | Alternator/Generator Bearings
- 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
