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.

Crankshaft Repair And Crankshaft Inspection

Raj — Tue, 19 Feb 2019 11:27:16 +0000

A crankshaft remains one of the most critical components in any diesel engine. When it fails, the ripple effects are costly, not just in parts but in downtime, loss of productivity, and unexpected breakdowns. That’s where RA Power Solutions steps in, combining decades of experience, advanced technology, and onsite availability to ensure crankshafts are repaired right, fast, and reliably.

In Situ Crankshaft Repair

What Makes RA Power Stand Out?

RA Power Solutions has experience of 47+ years in the field of repair of crankshafts, overhauling of high-capacity Diesel & major engine repair. The services extended by us are far better than the International standard and our service charges are the lowest in the world.

At RA Power Solutions, we understand the critical role that a crankshaft plays in the overall performance and durability of an engine. A properly functioning crankshaft is essential for smooth engine operation, power generation, and minimizing downtime. That’s why we offer comprehensive crankshaft inspection and crankshaft repair services to ensure the optimal performance of your machinery.

We have 24/7 availability of technicians with the necessary credentials & valid Indian CDC. They can travel to any destination in the world on short notice. We are the only company in the world that manufactures onsite crankshaft grinding equipment up to 700 mm & provides Crankshaft repair services as well. We have sold 70 onsite Crankshaft Grinding machines & have trained more than 150 technicians to undertake the repair of Crankshafts.

Stop availing of the crankshaft repair and Engine overhaul services from the local companies & avail the benefit of our experienced & low-cost services provided with the guarantee.

Core Services Offered:

Complete Calibration of Crankshaft diameter ranging from 30 mm to 700 mm. Inspection includes dimensional inspection of Crankpin & main journal, checking of hardness, Crack detection test with MPI, and surface roughness test. An inspection report in detail on our formats is prepared and submitted to our client.
Onsite grinding and Polishing of Crankshaft, maintaining the tolerances as mentioned in the maintenance manual of the engine manufacturer.
Straightening and Peening of Crankshaft.
Replacement of the Crankshaft in case of rejection.

Regular crankshaft inspection and timely repairs are crucial for maintaining the performance, reliability, and longevity of your engine. At RA Power Solutions, our experienced technicians and advanced equipment allow us to provide top-notch crankshaft inspection and crankshaft repair services.

MPI Inspection Test

With our onsite repair capabilities and expertise in crankshaft machining and grinding, we are the leaders in delivering comprehensive solutions to ensure the optimal performance of your machinery.

Trust us to keep your engines running smoothly and efficiently. Contact us today to schedule an onsite inspection of the crankshaft or discuss your crankshaft repair requirements.

For more information regarding onsite crankshaft inspection, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs:

1. What crankshaft sizes can RA Power Solutions repair?

They can machine and repair crankshafts with diameters up to 700 mm.

2. Do they provide onsite crankshaft grinding?

Yes, their team carries portable machines and performs grinding and polishing onsite.

3. How do they check crankshaft condition before repair?

They conduct crack detection, hardness tests, dimensional inspection, and surface finish measurement.

4. Can RA Power Solutions straighten a bent crankshaft?

Yes, they offer straightening and peening to restore crankshaft alignment.

5. What if the crankshaft cannot be repaired?

They arrange replacement of the crankshaft if repair is not feasible.

The post Crankshaft Repair And Crankshaft Inspection appeared first on Rebabbitting Bearing.

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