Professional Rebabbitting of White Metal Bearings for Marine & Industrial Applications
At RA Power Solutions, we have been carrying out rebabbitting of white metal bearings for marine engines, diesel generator (DG) sets, turbines, compressors, cement plant machinery, and other critical rotating equipment for decades. Having worked on bearing failures both during planned drydock periods and emergency breakdowns, we understand that a properly rebabbitted bearing is essential for restoring equipment reliability and minimizing downtime.
Our workshop undertakes the rebabbitting of white metal bearings, tri-metal bearings, and thrust pads using the centrifugal casting process. This method provides uniform distribution of Babbitt white metal and ensures consistent metallurgical bonding between the bearing shell and the lining when process parameters are maintained within specification.
Unlike general repair shops, we focus on maintaining OEM tolerances, proper bearing geometry, and bond integrity so the repaired bearing performs reliably under continuous operating conditions.
Why Rebabbitting is Preferred Over Bearing Replacement
Extending the Service Life of Critical Bearings
In my experience, many white metal bearings can be successfully restored without replacing the complete assembly, provided the steel or bronze shell remains structurally sound. Rebabbitting restores the working surface while retaining the original bearing housing, resulting in significant savings in cost and procurement time.
For marine applications, this is particularly important when replacement bearings have long delivery schedules or when repairs must be completed within a limited drydock window.
Properly executed rebabbitting restores the following:
- Original bearing geometry
- Load-carrying capacity
- Hydrodynamic lubrication characteristics
- Oil film stability
- Bearing clearances as specified by the OEM
- Our white metal bearing rebabbitting process
- Detailed Inspection Before Rebabbitting
Every bearing received in our workshop undergoes a detailed inspection before work begins.
We inspect for:
- White metal fatigue
- Bond failure
- Cracks
- Scoring
- Overheating
- Bearing shell distortion
- Ovality
- Taper
- Wear patterns
- Alignment-related damage
This inspection allows us to determine whether the bearing is suitable for rebabbitting or requires additional corrective machining.
Centrifugal Babbitting Process
Maintaining the correct centrifugal speed is essential for producing the following:
- Uniform white metal thickness
- Dense grain structure
- Proper metallurgical bonding
- Minimal casting defects
Both the bearing shell and white metal are heated under controlled conditions using electrical furnaces before pouring. Proper preheating prevents thermal shock and promotes strong adhesion between the shell and the Babbitt alloy.
Regardless of the grade of white metal used, maintaining the correct pouring temperature and shell temperature remains critical for achieving reliable bonding.
Precision Machining After Rebabbitting
Maintaining OEM Tolerances
Once the white metal has been cast, the bearing is machined completely in-house.
Our machining facility maintains tolerances within 30 microns, allowing us to restore the bearing to OEM dimensional requirements.
During machining, particular attention is given to:
- Bearing bore accuracy
- Concentricity
- Ovality
- Taper
- Running clearance
- Ra surface finish
- Fillet radius
- Oil groove geometry
Quality Inspection & Non-Destructive Testing
Verifying White Metal Bond Integrity
After machining, every bearing undergoes comprehensive inspection.
Our qualified engineers perform:
- Dye Penetrant Testing (DPT)
- Ultrasonic Testing (UT)
- Dimensional inspection
- Bond integrity verification
These inspections help identify:
- Bond separation
- Internal casting defects
- Porosity
- Surface discontinuities
For marine applications, inspection procedures can be carried out in accordance with owner requirements and, where applicable, the standards followed by DNV, ABS, and Lloyd’s Register.
Our Manufacturing & Rebabbitting Facilities
Heavy-Duty Equipment for Large Bearings
Our workshop is equipped to manufacture new white metal Babbitt bearings and undertake rebabbitting of old and damaged bearings.
Available Facilities
Thyristor-Controlled Centrifugal Babbitting Equipment
Large Vertical Boring Machine
- Capacity up to 30 tons
- Component diameter up to 4 meters
- Suitable for machining large marine and industrial bearings.
- Capable of machining components up to 13 meters in length.
- Ideal for heavy rotating equipment used in marine propulsion, power generation, and industrial applications.
- In-House Testing Facilities
Complete inspection facilities are available for white metal Babbitt bearings, including the following:
- Ultrasonic Testing
- Dye Penetrant Testing
- Dimensional inspection
- Bond integrity testing
- Final quality verification
- Marine Bearing Repair Experience
- Repairing Bearings for Marine Engines & Auxiliary Equipment
Over the years, we have repaired white metal bearings used in the following:
- Main propulsion engines
- Auxiliary engines
- Alternators
- Generator sets
- Steam turbines
- Gas turbines
- Compressors
- Pumps
- Gearboxes
In many cases, repairs are carried out under tight vessel schedules where minimizing downtime is essential. Whether the work is performed during a scheduled drydock or an emergency shutdown, our focus remains on restoring the bearing to OEM tolerances so it can safely return to service.
Why Proper Rebabbitting Matters
A white metal bearing operates on a stable hydrodynamic oil film. Any deviation in bearing geometry, surface finish, bonding quality, or clearance can affect lubrication performance and reduce bearing life.
By controlling every stage—from inspection and centrifugal casting to precision machining and non-destructive testing—we ensure the rebabbitted bearing is ready for demanding marine and industrial operating conditions.