Raj Shahani, Author at Rebabbitting Bearing

Wärtsilä B35:40V20AG2 (9.4 MW) | Alternator/Generator Bearings | Rebabbitting

Raj Shahani — Sat, 18 Jul 2026 09:41:58 +0000

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)

Bearing No. 1 (Big)

2. Bearing No. 2 (Small)

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.

Wärtsilä B35 40V20AG2 Generator Bearing After White Metal Rebabbitting

Reconditioned Alternator Generator Bearing for Reliable Marine Power Generation

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.

Rebabitted Wärtsilä Alternator Generator Bearings by RA Power Solutions

Completed Alternator Bearing Rebabbitting for Wärtsilä B35:40V20AG2

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.

Engine Bearings For Crankpin and Main Journal

Raj Shahani — Mon, 13 Apr 2026 09:14:46 +0000

Engine bearings manufactured from tri-metal for the crankpin and main journal of the crankshaft are supplied by RA Power Solutions.

We provide crankshaft grinding services, repair, and overall maintenance of auxiliary and main engines installed on vessels. We also extend these services to high-capacity power plants spread all over the world.

While standard-size bearings are readily available in stock with engine manufacturers, we have experienced that most of the time it is difficult to obtain tri-metal bearings for the crankpin and main journal of the crankshaft in undersized.

Undersized crankpin bearings

Crankpin Bearings For MAN & MAK Engines

White metal babbitt bearings

Undersized Bearings of Yanmar Diesel Engine

Requirement of Undersized Tri-Metal Bearings for Crankshaft

After grinding of the crankpin and main journal of the crankshaft, there is a requirement for undersized bearings, which are, in most cases, not readily available.

RA Power Solutions is the largest exporter of tri-metal bearings, mainly for diesel engines. We are listing below the names of a few popular engines and their models for which we maintain a ready stock of the bearings.

Sr No.	Description
Daihatsu 6DL-16 Standard Crankpin Diameter-120 mm
1	a) 2.50 mm Undersize Crankpin Bearing
	b) 3.00 mm Undersize Crankpin Bearing
	c) 4.00 mm Undersize Crankpin Bearing

MAN CME 5L 16/24 Standard Crankpin Diameter: 130 mm
2	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersized Crankpin Bearing

Yanmar Engine S 185L Standard Crankpin Diameter-140 mm
3	a) 0.80 mm Undersized Crankpin Bearing
	b) 1.20 mm Undersized Crankpin Bearing
	c) 1.60 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing

Yanmar Engine 6N18AL-DN/DV Standard Crankpin Diameter: 145 mm
4	a) 0.40 mm Undersized Crankpin Bearing
	b) 0.80 mm Undersized Crankpin Bearing
	c) 1.20 mm Undersized Crankpin Bearing
	d) 1.60 mm Undersized Crankpin Bearing
	e) 2.00 mm Undersized Crankpin Bearing
	f) 2.40 mm Undersized Crankpin Bearing
	g) 2.80 mm Undersized Crankpin Bearing

Daihatsu 5DC-17 Standard Crankpin Diameter-145mm
5	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersize Crankpin Bearing
	f) 3.00 mm Undersize Crankpin Bearing
	g) 4.00 mm Undersize Crankpin Bearing

MAK 8M20 Standard Crankpin Diameter: 152 mm
6	a) Standard Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing

Daihatsu 5DK-20 Standard Crankpin Diameter-170mm
7	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersize Crankpin Bearing
	f) 3.00 mm Undersize Crankpin Bearing
	g) 3.50 mm Undersize Crankpin Bearing
	h) 4.00 mm Undersize Crankpin Bearing
	i) 5.00 mm Undersize Crankpin Bearing

MAN 6L 23/30H Standard Crankpin Diameter: 185 mm
8	Key Position 12.5 x 15.5
	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersized Crankpin Bearing
	f) 3.00 mm Undersized Crankpin Bearing
	g) 4.00 mm Undersized Crankpin Bearing
	h) 5.00 mm Undersized Crankpin Bearing

	Key Position 7.7 x 10.7
	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersized Crankpin Bearing
	f) 3.00 mm Undersized Crankpin Bearing
	g) 4.00 mm Undersized Crankpin Bearing
	h) 5.00 mm Undersized Crankpin Bearing

Allen Engine PVBCS 12 F Standard Crankpin diameter – 190.45 mm to 190.47 mm
9	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing

MAN 9ASL 25/30 Standard Crankpin Diameter-195 mm
10	a) 2.50 mm Undersize Crankpin Bearing
	b) 3.00 mm Undersize Crankpin Bearing
	c) 4.00 mm Undersize Crankpin Bearing

Gas Engine Deutz MWM TBG32V16 Standard Crankpin diameter 204.50 mm
11	a) 0.50 mm Undersized Crankpin Bearing

MAN 9L28/32 H Standard Crankpin Diameter-230 mm
12	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersize Crankpin Bearing
	f) 3.00 mm Undersize Crankpin Bearing

Daihatsu 8DKM-28 Standard Crankpin Diameter-235 mm
13	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersize Crankpin Bearing

Daihatsu 8DK-32 Standard Crankpin Diameter-250 mm
14	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing

White Metal Babbitt Bearings

We also manufacture Babbitt white metal bearings and undertake the repair of old, damaged bearings for different applications such as alternators, intermediate shafts, turbines, pumps, etc.

Main Journal Bearings Standard & Undersize

Diesel engine bearings supplier

Engine Bearing Manufacturers

Crankpin Bearing Suppliers

R A Power Solutions: Complete Services for Crankshafts and Engines

R A Power Solutions not only sells bearings but also offers a full range of services at your location or in their workshop, such as

Grinding the crankshaft in place
Crankshaft repair and reconditioning
Grinding and polishing of crankpins on site
Repairing engine blocks and stitching metal
Emergency breakdown services worldwide
Repair services for marine and diesel engines

Our advanced portable equipment and experienced technicians enable us to deliver onsite services without dismantling, helping industries reduce downtime and operational costs.

We work with clients all over the world, including big areas like Saudi Arabia, the United Arab Emirates, Qatar, Kuwait, Oman, and Bahrain. We make sure that our service is quick and dependable.

After crankshaft grinding, the undersized crankpin and main journal bearings are very important. With ready stock availability and integrated repair services, R A Power Solutions ensures quick turnaround and dependable performance for all types of engines.

For undersized crankpin and main journal bearing requirements, please email us at info@rapowersolutions.com or call +91-9582647131 or +91-9810012383.

The post Engine Bearings For Crankpin and Main Journal appeared first on Rebabbitting Bearing.

Engine Bearing | Crankpin Bearing | Main Journal Bearings

Raj Shahani — Mon, 16 Feb 2026 10:24:39 +0000

RA Power Solutions maintains main and auxiliary engine bearings for leading engine manufacturers and their various models.

With over 47+ years of global experience in crankshaft repair, we understand the challenges shipowners and power plant operators face during engine overhauls. In many cases, undersized bearings for crankpins and main journals are not readily available in the market. As a result, engine commissioning is often delayed after the repair process.

Crankpin Bearings for Engine Modals

Main Journal Bearings Standard & Undersize

Manufacturers of Crankpin Bearings

Moreover, sourcing customized or non-standard bearing sizes can take considerable time. Project schedules are prolonged, operating expenses rise, and vessel downtime becomes inevitable as a result. Therefore, choosing a repair partner that can provide immediate technical solutions and alternative bearing support is critical for minimizing delays and ensuring smooth engine performance.

Maintenance of Stock of Crankpin | Main Journal Bearings by RA Power Solutions

We maintain a large stock of crankpin and main journal bearings for auxiliary and main engines of popular makes and models.

A few are described as follows:

*Sr No.*	*Description*
*Daihatsu 6DL-16 Standard Crankpin Diameter-120 mm*
1	a) 2.50 mm Undersized Crankpin Bearing
	b) 3.00 mm Undersized Crankpin Bearing
	c) 4.00 mm Undersize Crankpin Bearing

*MAN CME 5L 16/24 Standard Crankpin Diameter- 130mm*
2	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersized Crankpin Bearing

*Yanmar Engine S 185L Standard Crankpin Diameter—140 mm*
3	a) 0.80 mm Undersized Crankpin Bearing
	b) 1.20 mm Undersized Crankpin Bearing
	c) 1.60 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing

*Yanmar Engine 6N18AL-DN/DV Standard Crankpin Diameter—145 mm*
4	a) 0.40 mm Undersized Crankpin Bearing
	b) 0.80 mm Undersized Crankpin Bearing
	c) 1.20 mm Undersized Crankpin Bearing
	d) 1.60 mm Undersized Crankpin Bearing
	e) 2.00 mm Undersized Crankpin Bearing
	f) 2.40 mm Undersized Crankpin Bearing
	g) 2.80 mm Undersized Crankpin Bearing

*Daihatsu 5DC-17 Standard Crankpin Diameter—145 mm*
5	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersize Crankpin Bearing
	f) 3.00 mm Undersize Crankpin Bearing
	g) 4.00 mm Undersize Crankpin Bearing

*MAK 8M20 Standard Crankpin Diameter—152 mm*
6	a) Standard Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing

*Daihatsu 5DK-20 Standard Crankpin Diameter—170 mm*
7	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersize Crankpin Bearing
	f) 3.00 mm Undersize Crankpin Bearing
	g) 3.50 mm Undersize Crankpin Bearing
	h) 4.00 mm Undersize Crankpin Bearing
	i) 5.00 mm Undersized Crankpin Bearing

*MAN 6L 23/30H Standard Crankpin Diameter—185 mm*
8	Key Position 12.5 x 15.5
	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersized Crankpin Bearing
	f) 3.00 mm Undersized Crankpin Bearing
	g) 4.00 mm Undersized Crankpin Bearing
	h) 5.00 mm Undersized Crankpin Bearing

	Key Position 7.7 x 10.7
	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersized Crankpin Bearing
	f) 3.00 mm Undersized Crankpin Bearing
	g) 4.00 mm Undersized Crankpin Bearing
	h) 5.00 mm Undersized Crankpin Bearing

*Allen Engine PVBCS 12 F Standard Crankpin diameter – 190.45 mm to 190.47 mm*
9	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing

*MAN 9ASL 25/30* *Standard Crankpin Diameter-195 mm*
10	a) 2.50 mm Undersize Crankpin Bearing
	b) 3.00 mm Undersize Crankpin Bearing
	c) 4.00 mm Undersize Crankpin Bearing

*Gas Engine Deutz MWM TBG32V16 Standard Crankpin diameter 204.50 mm*
11	a) 0.50 mm Undersized Crankpin Bearing

*MAN 9L28/32 H Standard Crankpin Diameter-230 mm*
12	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersize Crankpin Bearing
	f) 3.00 mm Undersize Crankpin Bearing

*Daihatsu 8DKM-28 Standard Crankpin Diameter-235 mm*
13	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing
	d) 2.00 mm Undersized Crankpin Bearing
	e) 2.50 mm Undersize Crankpin Bearing

*Daihatsu 8DK-32 Standard Crankpin Diameter-250 mm*
14	a) 0.50 mm Undersized Crankpin Bearing
	b) 1.00 mm Undersized Crankpin Bearing
	c) 1.50 mm Undersized Crankpin Bearing

Development of Special-Size Crankpin and Main Journal Bearings

R A Power Solutions also maintains a stock of crankpin and main journal bearings that are undersized beyond the manufacturer’s recommendations. The ready availability of special-size bearings has saved many crankshafts from rejection.

Main Journal Bearings

Engine Bearing Manufacturers

Crankpin Bearing Suppliers

Special-size crankpin and main journal bearings are critical to making sure an engine runs well after a crankshaft repair. When typical undersized bearings aren’t available, custom-engineered solutions are necessary to avoid expensive downtime and delays in commissioning. So, precision manufacture, precise dimensional control, and high-quality Babbitt lining are all done very carefully to meet the exact specifications for the crankpin and main journal.

Also, innovative manufacturing methods and thorough quality checks make sure that the load is evenly distributed, friction is low, and the life of the bearings is longer. Because of this, special-size journal bearings are a reliable choice for marine engines, power plants, and heavy industrial uses.

For undersized crankpin and main journal bearing requirements, please email us at info@rapowersolutions.com or call +91 9582647131 or +91 9810012383.

FAQs

1. What are crankpin and main journal bearings used for in an engine?

Crankpin bearings support the crankpins, while main journal bearings support the crankshaft main journals; both reduce friction between moving parts and ensure smooth engine rotation, especially after grinding or repair work.

2. Why are undersized bearings sometimes required after crankshaft repair?

When crankpins or main journals are ground to remove wear or damage, their diameters are reduced. As a result, undersized bearings are needed to maintain correct clearances and proper lubrication.

3. Does RA Power Solutions stock both standard- and special-sized bearings?

Yes—the company maintains a large inventory of standard, undersized, and special-size crankpin and main journal bearings for many popular engine makes and models, helping minimize downtime.

4. Which engine brands are supported with ready-to-use or custom bearings?

RA Power Solutions supports top manufacturers such as Wartsila, Daihatsu, MAN, Sulzer, Yanmar, MWM, Caterpillar, MTU, Cummins, and more, with a wide range of bearing sizes in stock.

5. Can special-size bearings extend the life of a repaired crankshaft?

Absolutely — custom bearings made beyond OEM undersize limits can save crankshafts that would otherwise be rejected, ensuring reliable performance and reducing the need for costly replacements.

The post Engine Bearing | Crankpin Bearing | Main Journal Bearings appeared first on Rebabbitting Bearing.

What Is Rebabbitting of a Bearing?

Raj Shahani — Fri, 14 Nov 2025 06:29:48 +0000

Rebabbitting of bearing is the process of removing worn Babbitt metal from a bearing shell and applying a fresh layer to restore its original performance. This is essential when the Babbitt surface shows wear, damage, or degradation that affects bearing reliability.

Why Rebabbitting Is Important

Rebabbitting brings a damaged or worn bearing back to OEM-level efficiency by restoring:

Correct bearing geometry
Load-carrying capacity
Lubrication flow
Vibration and heat control

Rebabbitting of White Metal Bearing

Turbine bearing After White Metal Rebabbitting

Signs Your Bearing Needs Rebabbitting

If you notice any of these issues, the bearing likely needs immediate inspection or rebabbitting:

Wear marks or uneven surfaces
Scoring, pitting, or blistering
Burn marks or discoloration
Lubrication breakdown
Excess vibration or noise

These symptoms often indicate deeper problems in the shaft line or lubrication system, so early diagnosis is crucial.

How Rebabbitting Is Done

Inspection & Non-Destructive Testing

Technicians inspect the bearing for cracks, alignment issues, and material fatigue.

Old Babbitt Removal
They melt or machine off the worn Babbitt layer from the shell.
Surface Preparation
They clean, tin, and prep the shell to ensure a strong bond.
New Babbitt Casting
High-grade babbitt metal—typically tin-based—is poured or centrifugally cast.
Machining to OEM Specs
They bore, chamfer, and finish the new Babbitt surface to precise OEM tolerances.
Final QA & Clearance Check
The bearing is tested for geometry, hardness, bond strength, and fit.

Why Babbitt Metal Is Used

Babbitt works as a soft, protective layer that:

Embeds contaminants (protecting the shaft)
Supports hydrodynamic lubrication
Reduces friction and heat
Prevents catastrophic damage during overloads

Rebabbitting Services by R A Power Solutions

R A Power Solutions specializes in:

Rebabbitting turbine bearings
Babbitt bearing repair at site or workshop
Reverse engineering & restoration of damaged bearings
Rapid dispatch of technicians worldwide

Our team diagnoses root causes, not just symptoms and helps prevent recurring failures.

For any information regarding Babbitt bearings, crankpin bearings, rebabbitting of bearings, and Babbitt white metal, please email us at rajshahani@rapowersolutions.com, info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs:

1. What is rebabbitting of a bearing?

A: Rebabbitting is the process of removing worn Babbitt metal from a bearing shell and applying a fresh layer to restore its performance.

2. Why is rebabbitting necessary?

A: It’s needed when bearings lose lubrication efficiency, show scoring, or fail under load. Rebabbitting brings them back to near-new condition.

3. How long does the rebabbitting process take?

A: Typically, a few days, depending on bearing size, inspection needs, machining, and casting time.

4. What types of bearings can be rebabbitted?

A: Large industrial, marine engine, turbine, pump, and compressor bearings with Babbitt linings can all be rebabbitted.

5. Is rebabbitting cheaper than replacing a bearing?

A: Yep—rebabbitting is usually far more cost-effective, especially for large or custom bearings that are expensive to replace.

The post What Is Rebabbitting of a Bearing? appeared first on Rebabbitting Bearing.

Wartsila Generator Bearing Repair/Rebabbitting

Raj Shahani — Thu, 30 Oct 2025 06:32:09 +0000

RA Power Solutions undertakes repair and rebabbitting of Wartsila engines and other makes of alternator and generator bearings. We have the facility to carry out rebabbitting for bearings up to 1500 mm in diameter.

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.

Wartsila Generator Bearing Babbitt White Metal in Damaged Condition

Wartsila Generator Bearing Babbitt White Metal During Inspection

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

S. No	Description	Standard Dimensions with Tolerance as Per Drawing
1	Bearing Inner Diameter (Bore)	250.00 (0.03)
2	Bearing 2nd Inner Diameter	266.00MM
3	Bearing Outer Diameter	507.00MM
4	Bearing White Metal Width	250.00MM
5	Bearing Total Width	263.00MM
6	Client	Based in Yekaterinburg, Russia

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.

Wartsila Generator Bearing After Repair

Wartsila Generator Bearing After Rebabbitting

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

1. What’s the maximum bearing size you can rebabbitt?

RA Power Solutions has the facility to rebabbitt bearings with a bore diameter up to 1500 mm. The blog specifically states: We have the facility to carry out rebabbitting for bearings up to 1500 mm in diameter.

2. What process and materials are used in the rebabbitting?

The process includes: removal of the old white metal, metallurgical testing of the removed metal, sand-blasting of the shell to bare metal to prepare it for bonding, then rebabbitting using imported white metal (from a leading manufacturer in Spain), followed by machining, polishing to a mirror finish, and ultrasonic testing. The blog describes each step in detail: removal, import material, sand-blast, magnetic/ultrasonic testing, etc.

3. How do you ensure the quality and reliability of the rebabbitted bearing?

Several rigorous quality checks are performed: a magnetic particle test to detect cracks, hardness testing of the inner diameter (and removal of any hard spots by grinding/scooping), ultrasonic testing post-machining to verify there are no abnormalities. The blog states all these steps explicitly.

4. Can you meet precise dimensions and tolerances, especially for critical bearings like for generators/alternators?

Yes. RA Power Solutions worked on a generator bearing for a client in Russia with exact dimensions: inner diameter 250.00 mm (tolerance 0.03), second inner dia 266.00 mm, outer diameter 507.00 mm, white-metal width 250.00 mm, total width 263.00 mm. This shows they can achieve tight tolerances in rebabbitting.

5. Do you provide worldwide service and for what industries?

Absolutely. The blog says RA Power Solutions provides rebabbitting and bearing repair services worldwide. They mention a client in Yekaterinburg, Russia, and say they serve power plants, marine engines, and heavy industries in over 100+ countries.

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