Raj Shahani, Author at Rebabbitting Bearing https://rebabbittingbearing.com/author/admin/ Mon, 13 Apr 2026 09:40:28 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://rebabbittingbearing.com/wp-content/uploads/2025/07/cropped-logo-raps-32x32.png Raj Shahani, Author at Rebabbitting Bearing https://rebabbittingbearing.com/author/admin/ 32 32 Engine Bearings For Crankpin and Main Journal https://rebabbittingbearing.com/engine-bearings-for-crankpin-and-main-journal/?utm_source=rss&utm_medium=rss&utm_campaign=engine-bearings-for-crankpin-and-main-journal https://rebabbittingbearing.com/engine-bearings-for-crankpin-and-main-journal/#respond Mon, 13 Apr 2026 09:14:46 +0000 https://rebabbittingbearing.com/?p=32063 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...

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

]]> 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.

Crankpin Bearings for Engine Modals
Undersized crankpin bearings
Crankpin Bearings For MAN & MAK Engines
Crankpin Bearings For MAN & MAK Engines
Engine Crankpin Bearings
White metal babbitt bearings
Undersize Bearings of Yanmar Diesel Engine
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
2a) 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
3a) 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
4a) 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
6a) 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
8Key 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
Main Journal Bearings Standard & Undersize
Diesel engine bearings supplier
Engine Bearing Manufacturers
Engine Bearing Manufacturers
Crankpin Bearing Suppliers
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.

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]]> https://rebabbittingbearing.com/engine-bearings-for-crankpin-and-main-journal/feed/ 0 Engine Bearing | Crankpin Bearing | Main Journal Bearings https://rebabbittingbearing.com/engine-bearing-crankpin-bearing-main-journal-bearings/?utm_source=rss&utm_medium=rss&utm_campaign=engine-bearing-crankpin-bearing-main-journal-bearings https://rebabbittingbearing.com/engine-bearing-crankpin-bearing-main-journal-bearings/#respond Mon, 16 Feb 2026 10:24:39 +0000 https://rebabbittingbearing.com/?p=32012 RA Power Solutions maintains main and auxiliary engine bearings for leading engine manufacturers and their various models. With over 46 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 post Engine Bearing | Crankpin Bearing | Main Journal Bearings appeared first on Rebabbitting Bearing.

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

With over 46 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
Crankpin Bearings for Engine Modals
Main Journal Bearings Standard & Undersize
Main Journal Bearings Standard & Undersize
Manufacturers of Crankpin Bearings
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
1a) 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
2a) 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
3a) 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
4a) 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
5a) 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
6a) 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
7a) 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
8Key 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
9a) 0.50 mm Undersized Crankpin Bearing
b) 1.00 mm Undersized Crankpin Bearing
MAN 9ASL 25/30 Standard Crankpin Diameter-195 mm
10a) 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
11a) 0.50 mm Undersized Crankpin Bearing
MAN 9L28/32 H Standard Crankpin Diameter-230 mm
12a) 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
13a) 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
Main Journal Bearings
Engine Bearing Manufacturers
Engine Bearing Manufacturers
Crankpin Bearing Suppliers
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.

]]> https://rebabbittingbearing.com/engine-bearing-crankpin-bearing-main-journal-bearings/feed/ 0 What Is Rebabbitting of a Bearing? https://rebabbittingbearing.com/what-is-rebabbitting-of-a-bearing/?utm_source=rss&utm_medium=rss&utm_campaign=what-is-rebabbitting-of-a-bearing https://rebabbittingbearing.com/what-is-rebabbitting-of-a-bearing/#respond Fri, 14 Nov 2025 06:29:48 +0000 https://rebabbittingbearing.com/?p=31359 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...

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

]]> 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
Turbine bearing After White Metal Rebabbitting
Rebabbitting of White Metal Bearing
Turbine bearing After White Metal Rebabbitting
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.

  1. Old Babbitt Removal
    They melt or machine off the worn Babbitt layer from the shell.
  2. Surface Preparation
    They clean, tin, and prep the shell to ensure a strong bond.
  3. New Babbitt Casting
    High-grade babbitt metal—typically tin-based—is poured or centrifugally cast.
  4. Machining to OEM Specs
    They bore, chamfer, and finish the new Babbitt surface to precise OEM tolerances.
  5. 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.

]]> https://rebabbittingbearing.com/what-is-rebabbitting-of-a-bearing/feed/ 0 Wartsila Generator Bearing Repair/Rebabbitting https://rebabbittingbearing.com/wartsila-generator-bearing-repair-rebabbitting/?utm_source=rss&utm_medium=rss&utm_campaign=wartsila-generator-bearing-repair-rebabbitting https://rebabbittingbearing.com/wartsila-generator-bearing-repair-rebabbitting/#respond Thu, 30 Oct 2025 06:32:09 +0000 https://rebabbittingbearing.com/?p=31328 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...

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

]]> 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 in Damaged Condition
Wartsila Generator Bearing Babbitt White Metal During Inspection

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

S. NoDescriptionStandard Dimensions with Tolerance as Per Drawing
1Bearing Inner Diameter (Bore)250.00 (0.03)
2Bearing 2nd Inner Diameter266.00MM
3Bearing Outer Diameter507.00MM
4Bearing White Metal Width250.00MM
5Bearing Total Width263.00MM
6ClientBased 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 Repair
Wartsila Generator Bearing After Rebabbitting
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 45 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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