crankpin bearings Archives - 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 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

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.

Rebabbitting of White Metal Bearings | Babbitt Bearing Manufacturers

Raj — Wed, 24 Jan 2024 07:32:32 +0000

RA Power Solutions undertakes rebabbitting of old, worn-out, and damaged bearings up to 1500 mm in diameter for large industrial and marine companies. The rebabbitting is undertaken using the different grades of Babbitt white metal as per international standards. We undertake all bearing rebabbitting using the centrifugal process, which ensures perfect bonding with the steel casing of the bearings.

High-Quality Babbitt Alloy Application

We remove the white metal of the bearing under controlled temperature.
We shot-blasted the bare bearing steel casing for proper cleaning.
We perform a hardness test on the bearing casing and remove all hard spots by scooping.
They test the bearing casing for hardness and scoop out any hard spots.
The bearing casing is subject to crack detection by the MPI process.
The bearings are centrifugally cast.
All the bearings after rebabbitting are subject to ultrasound tests to check the bonding with the base metal
We perform the final machining on CNC machines, maintaining close tolerances as per the requirements.

We manufacture Babbitt bearings as per the drawing and requirements of the client. Firstly, we have in‑house facilities to manufacture white metal engine bearings. Additionally, we produce white metal pump shaft bearings, white metal turbine bearings, and white metal alternator bearings. Moreover, we also manufacture white metal rotor shaft bearings, white metal crankshaft bearings, and white metal bearings for all shaft sizes ranging from 60 mm to 1500 mm.

Damaged Bearing for Rebabbitting

RA Power Solutions: Global White Metal Babbitt Bearing Experts with Seamless Installation & Export Services

With a focus on customer satisfaction, RA Power Solutions caters to a diverse range of industries, including power generation, marine, and heavy engineering. Their white metal bearings are design to withstand extreme conditions, providing long-lasting solutions that contribute to the efficiency and longevity of machinery.

We provide comprehensive solutions, including installation and maintenance services, to ensure our clients enjoy seamless operations and minimal downtime.

Located near New Delhi, India (International Airport), we quickly and cost-effectively handle all arrangements for import and re-export after repairs. This is the primary reason we serve more than 36 countries, meeting their critical needs for new white metal Babbitt bearings and providing rebabbitting services for damaged bearings.

For more information on White Metal Bearings, Rebabbitting of White Metal Bearings, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or+91 9810012383.

FAQs

1. What sizes of bearings can you rebabbitt using centrifugal casting?

A: As mentioned, the company handles bearings up to 1,500 mm in diameter using the centrifugal process.

2. How do you ensure there are no cracks or hard spots in the casing before rebabbitting?

A: The casing undergoes hardness testing (with hard spots scooped out) and MPI crack detection to ensure integrity.

3. What non-destructive tests (NDT) do you perform to verify bonding after rebabbitting?

A: Post-casting, ultrasound tests are carried out to check the bond between the new lining and the base metal.

4. Do you provide final machining/tolerances after rebabbitting, and how accurate is it?

A: Yes, all bearings are finish-machine on CNC machines to maintain close tolerances per client requirements.

5. Where are you located, and can you handle international shipping?

A: The company is based near New Delhi International Airport and serves 36+ countries, offering import/re-export services.

The post Rebabbitting of White Metal Bearings | Babbitt Bearing Manufacturers appeared first on Rebabbitting Bearing.

High-Quality Crankshaft Grinding Services in Iraq by RA Power Solutions

Raj — Mon, 17 Jul 2023 09:38:33 +0000

When it comes to maintaining the performance and longevity of engines, a properly functioning crankshaft plays a vital role. Over time, crankshafts may develop wear, deformation, or other issues that can negatively impact engine performance.

Why Choose RA Power Solutions?

RA Power Solutions boasts decades of experience in the field of engine repair and maintenance. Their team comprises highly skilled engineers who are well-versed in the intricacies of crankshaft grinding. They stay updated with the latest industry techniques to deliver top-quality services.

Cutting-Edge Technology:

To ensure precision and accuracy in crankshaft grinding, RA Power Solutions employs advanced equipment and tools. They utilize state-of-the-art grinding machines and measurement instruments, including portable onsite crankshaft grinding machines. This enables them to provide high-quality services with minimal downtime.

Onsite Crankshaft Grinding:

Crankshaft Grinding and Polishing

RA Power Solutions understands the importance of time in the industrial sector. We offer In Situ crankshaft grinding services to minimise engine downtime and transportation costs. Their portable machines can grind crankshafts of any size, making them highly flexible and efficient.

Quality Assurance:

Maintaining the highest standards of quality is a top priority for RA Power Solutions. They adhere to stringent quality control measures throughout the crankshaft grinding process. Each repaired crankshaft undergoes rigorous inspections to ensure that it meets or exceeds OEM specifications.

Comprehensive Solutions:

Apart from crankshaft grinding, RA Power Solutions offers a wide range of engine repair and maintenance services. They provide services like crankshaft repair, metal stitching, engine overhauling, cylinder liner honing, and more. This makes them a one-stop solution for all your engine-related needs.

Global Reach:

With a strong presence across multiple countries, including Iraq, RA Power Solutions offers its services to clients worldwide. They have completed numerous projects in Iraq, establishing a solid reputation for their expertise and reliability.

Conclusion:

When it comes to crankshaft grinding services in Iraq, RA Power Solutions stands out as a trusted and reliable partner. Their skilled technicians, cutting-edge equipment, and commitment to quality ensure that your engines receive the best possible care.

Whether you require onsite grinding or comprehensive engine repair solutions, RA Power Solutions has the expertise and resources to meet your needs. Contact them today to experience their exceptional crankshaft grinding services and keep your engines running at their best.

You can trust RA Power Solutions to do a great job with all of your Crankshaft Grinding Services In Iraq because we care about quality and making our customers happy. Please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383 if you need further information.

FAQs

1. Can RA Power Solutions perform crankshaft grinding onsite in Iraq?

Yes, RA Power Solutions offers in situ crankshaft grinding services, eliminating the need to remove the crankshaft from the engine, thereby reducing downtime and transportation costs.

2. What types of engines can benefit from these services?

Their services cater to a wide range of engines, including marine engines, industrial engines, and power plant equipment, ensuring versatility across various sectors.

3. What is the typical turnaround time for crankshaft grinding in Iraq?

RA Power Solutions emphasises rapid mobilisation, often responding to breakdowns within hours, ensuring minimal disruption to operations.

4. Are the repairs conducted in compliance with international standards?

Yes, all crankshaft grinding and polishing services adhere to stringent quality control measures, meeting or exceeding OEM specifications.

5. Do they provide post-repair inspection and certification?

Absolutely, each repaired crankshaft undergoes rigorous inspections, and clients receive final inspection certification confirming the work’s compliance with international standards.

The post High-Quality Crankshaft Grinding Services in Iraq by RA Power Solutions appeared first on Rebabbitting Bearing.

Engine Bearing Manufacturers | RA Power Solutions

Raj — Thu, 23 Mar 2023 11:15:26 +0000

RA Power Solutions has realized that it is quite difficult to get the crankpin and main journal bearings for the diesel engine, compressors, pumps and motors, and all rotatory equipment.

The equipment manufacturer discontinued most models, so you can no longer source replacement bearings from them. As a result, you must turn to custom-engineered or aftermarket alternatives.

In this situation, it’s very difficult to operate the equipment as bearings need replacement after fixed hours of operation.

RA Power Solutions plays an important role in the development and manufacture of Tri metal and Bi-metal babbitt bearings. These bearings are manufactured on the basis of the following information:

Development of bearings as per the sample:

We convert the client’s provided bearing sample into a detailed CAD‑CAM drawing. The new bearings are manufactured according to the dimensions and type of material composition like tri-metal or babbitt white metal.

Development of bearing as per the drawing:

The drawing of the bearings for diesel engines, compressors, pumps and motors, and all rotatory equipment is provided by the client. We develop and manufacture the bearings strictly as per the drawing and the type of bearing required by the customers.

Acceptance of small quantity of bearings:

We accept a small number of bearings for all applications. We also maintain a large stock of main & auxiliary engine bearings of popular make and model of engines like MAK, CKD Skoda, MAN B & W, Cummins, Ariel Compressor Bearings, Caterpillar, Niigata, Daihatsu, Mirrlees Blackstone, Deutz, Pielstick, etc.

We are the best engine bearing manufacturers and we export Babbitt white metal bearings/ Tri metal Bearings in countries like Argentina, Bahamas, Barbados, Bermuda, Bolivia, Brazil, Canada, Chile, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, Guatemala, Guyana, Haiti, Honduras, Jamaica, Iran, Mexico, Nicaragua, etc.

For more information on engine bearing manufacturers, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs

1. Why is sourcing replacement bearings for diesel engines and pumps so challenging?

RA Power Solutions explains that many engine and pump models are discontinued, making OEM bearings hard to find—necessitating custom-engineered Tri‑metal and Bi‑metal Babbitt replacements.

2. How do you ensure precise fit and compatibility for custom bearings?

They digitally recreate the bearing via CAD-CAM from your sample or drawing, then craft the bearing to exact dimensions and materials (Tri‑metal or Babbitt white metal).

3. Do you accept small orders or only large-scale runs?

RA Power Solutions welcomes small-quantity orders and also stocks popular engine brands (e.g., MAN B&W, Cummins, Caterpillar, Ariel, etc.) for quicker turnarounds

4. Can you supply these custom bearings internationally?

Yes—they export white-metal and tri-metal bearings globally to countries such as Argentina, Brazil, Canada, Mexico, and many more

5. How can I contact RA Power Solutions for bearing manufacturing or repair?

Reach out via email at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call +91 95826 47131 or +91 98100 12383.

The post Engine Bearing Manufacturers | RA Power Solutions appeared first on Rebabbitting Bearing.

Special Size Engine Bearings | Undersize Marine Engine Bearings

Raj — Thu, 16 May 2019 08:33:53 +0000

RA Power Solutions undertakes on site repair of the crankshafts of main and auxiliary engines installed on vessels, as well as high-capacity engines used for various applications. The crankshaft repair is undertaken by the use of specially designed portable, compact, and lightweight onsite crankshaft grinding machines, which are designed, developed, and manufactured.

After grinding the crankpin and main journal of the crankshaft, undersized bearings are required. Manufacturers and their agents often do not have these undersized bearings readily available. RA Power Solutions maintains a large stock of undersized bearings for crankpins and main journals. We supply bearings for main and auxiliary engines of all popular makes and models installed on vessels.

The bearings are imported from Japan and Europe. The ready availability of bearings reduces the downtime of the engine. RA Power Solutions supplies main journal and crankpin bearings with a guarantee of satisfactory performance for 2,500 hours of operation or 12 months from the date of dispatch.

Crankpin Bearings of Yanmar Diesel Engine Model No. 6N18L-DN

We maintain the stock of bearings for the following engines:

Wartsila , Daihatsu , MWM , Caterpillar , MaN , MaK , B&W , Sulzer , Bergen , Detroit Diesel , Stork Werkspoor , Pielstick , Deutz , Yanmar , MTU , Cummins , Nohab Polar , Caterpillar , Mitsubishi , Yanmar , MaK 551 , MaK 552 , MaK 453 , MaK 451 AK , MaK 452 AK , Deutz 540 , Deutz 358 , Deutz 350, Pielstick PC 2.2 PC 2.5, Wartsila 524 ,Wartsila 824 TS, Sulzer 6 AL 25/30, Sulzer 5 AL 25/30 MWM TBD 484, MaN 40/54 , MaN Sulzer 12 ASV 25/30 , Sulzer 16 ZV 40/48 , Deutz BV 16M 540 , B&W 6L 45 GFCA, MAN B&W 55/GF, CAT D353, B&W 5T23LH, Daihatsu 6 PST 26D, Daihatsu 6 PSHTb 26M, Mak 6MU 451 AK, Deutz 6M 628, Caterpillar 3512, Deutz BV 12M 628, MWM TBD 234, WICHMANN 5AX, SKL 8NVD 48A-2U, Pielstick PC 2.2 LNR, Caterpillar 3508 and more.

We have been repairing crankshafts for over forty-five years. In some cases, we encounter crankpins or main journals that require reducing the diameter beyond the manufacturer’s last specified limits. In this situation, the user has no option but to reject the crankshaft and purchase the new crankshaft, the cost of which is exorbitant, and the procurement period is long.

white metal bearings in Singapore

RA Power Solutions can manufacture and supply bearings of sizes that exceed the manufacturer’s last recommended undersized size in the maintenance manual. The supply of these special-size bearings, such as those for the Yanmar engine, helps save the crankshaft from rejection.

For more information regarding bearings for the Yanmar engine, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs:

1. Why do engines need undersize bearings after crankshaft grinding?

When we grind crankpins and main journals undersize to restore proper clearances, the engine requires undersize bearings.

2. Does RA Power Solutions stock undersize and special-size bearings?

Yes, they maintain a large inventory of undersize and special-size crankpin and main journal bearings for popular marine engine models.

3. Which engine makes do they support with special-size bearings?

They serve top brands like Wartsila, Daihatsu, MAN, Sulzer, Yanmar, MWM, Caterpillar, MTU, Cummins, and more.

4. Can RA Power Solutions exceed OEM undersize limits for crankshaft repair?

Yes, they manufacture special-size bearings beyond the last recommended undersize to save crankshafts from rejection.

What performance guarantee accompanies their special-size bearings?

All crankpin and main journal bearings come with a performance guarantee of 2,500 hours of operation or 12 months from dispatch.

The post Special Size Engine Bearings | Undersize Marine Engine Bearings appeared first on Rebabbitting Bearing.