Tri Metal Bearing 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.

Tri Metal Bearing | Rebabbitting of White Metal Bearing

Raj — Fri, 26 Apr 2019 14:56:55 +0000

RA Power Solutions manufactures thin-shell tri-metal, bi-metal, and white metal Babbitt bearings. Thin-shell tri-metal bearings are the most widely used in diesel engines. We produce bearings with material combinations such as steel–Babbitt, steel–bronze, and steel–tin. Tin-based bearings offer higher load-bearing capacity compared to other types.

As the name suggests, thin shell tri-metal bearings have a thickness of the bearing ranging between 2 to 5 mm for the medium capacity engine and thickness up to 10 mm for high-capacity engines. The Babbitt bearing is manufactured by RA Power Solutions up to 1500 mm inner diameter.

Tri-Metal Bearing

We centrifugally cast and machine white metal Babbitt bearings in-house. We rebabbit old and damaged bearings and machine them as per the drawing or sample.

Features of Tri-Metal and White Metal Bearings by RA Power Solutions

I) Strict quality control procedures are followed right from the selection of raw material, i.e., steel shell, white metal babbitt material, and various alloys used for tri-metal and white metal bearing.

II) We perform rough and final machining of bearings on modern CNC machines. These machines ensure precise tolerances for tri-metal, bi-metal, and white metal Babbitt bearings. We strictly follow the tolerances specified by the manufacturer.

III) We use a centrifugal process to bond the steel back of the bearing with the aluminium-tin alloy. This process ensures strong and reliable bonding. It is again of great importance that the bonding between the steel shell and the alloy is strong.

IV) We manufacture undersize bearings or bearings with a higher outer diameter than standard. We follow the drawing or sample of the bearing.

V) A small quantity of the bearing is accepted. In the case of the babbitting of white metal bearing, RA Power Solutions organizes the import and export of the bearing. We are based in Gurgaon near the International Airport, New Delhi.

Tri-Metal Bearings

Tri Metal Bearings are crucial components in various industrial applications, and proper maintenance is essential for their longevity and performance. Rebabbitting of white metal bearings, expertly handled by RA Power Solutions, ensures optimal functioning and reliable performance of these bearings.

With their commitment to precision, advanced techniques, and adherence to industry standards, RA Power Solutions continues to be a trusted partner in bearing repair and maintenance, offering cost-effective solutions for clients worldwide.

Tri metal Bearings

With over 45 years of experience in the industry, RA Power Solutions specializes in the manufacturing of tri-metal bearings and rebabbitting of white metal bearings.

For more information regarding the metal bearings manufacturer and metal bearing solutions, please email us at rajshahani@rapowersolutions.com, info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs:

1. What types of bearings does RA Power Solutions handle?

RA Power Solutions manufactures and rebabbits white metal Babbitt and tri metal bearings for engines, turbines, compressors, and more (up to 1500 mm bore).

2. How do you perform rebabbitting and ensure quality?

They use a centrifugal rebabbitting process, operate precision furnaces, and run ultrasonic/dye-penetrant tests to deliver strong, pinhole-free bonding.

3. Do you offer in situ (onsite) services?

Yes, RA Power Solutions provides in situ crankshaft, turbine shaft, and alternator shaft grinding and polishing (up to 700 mm diameter).

4. Can you make bearings from samples or drawings?

Yes,they manufacture bearings from client-provided samples or drawings and accept even small-quantity orders.

5. What quality controls do you follow during manufacturing and repair?

RA Power Solutions follows ISO 9001:2015 standards, conducts CNC machining, NdT, ultrasonic testing, metallurgical checks, and issues full certification.

The post Tri Metal Bearing | Rebabbitting of White Metal Bearing appeared first on Rebabbitting Bearing.