Main Journal Bearings: Standard & Undersize
RA Power Solutions is a leading engineering company providing onsite machining and grinding of the crankshaft of diesel engines, compressors, pumps, etc.
The requirement of main journal bearings in the case of auxiliary engines and marine engines after grinding is obvious. Engine manufacturers often do not keep crankpin and main journal bearings of popular engine models readily available in stock.
RA Power Solutions maintains the stock of standard/undersized crankpin bearings and main journal bearings for the reputed makes and models of engines like B&W, Daihatsu, Deutz, MAK, MAN, Yanmar, Sulzer, Compressor, CKD Skoda and Allen, etc.
We are giving below a sample list of the bearings of the crankpin and main journal which are available with us in stock. We can share a complete list of crankpin and main journal bearings upon request.
| Sr. No | Description | Qty |
|---|---|---|
| 1 | MAN CME 5L 16/24 Standard Crankpin Diameter- 130 mm | |
| a) 0.5 mm Undersized Crankpin Bearing | 8 pairs | |
| b) 1.0 mm Undersized Crankpin Bearing | 8 pairs | |
| c) 1.5 mm Undersized Crankpin Bearing | 8 pairs | |
| d) 2.0 mm Undersized Crankpin Bearing | 8 pairs | |
| e) 2.5 mm Undersized Crankpin Bearing | 8 pairs | |
| f) Main Journal Bearings | 8 pairs | |
| 2 | Daihatsu 5DK20 Standard Crankpin Diameter-170 mm | |
| a) 0.5 mm Undersized Crankpin Bearing | 8 pairs | |
| b) 1.0 mm Undersized Crankpin Bearing | 8 pairs | |
| c) 1.5 mm Undersized Crankpin Bearing | 8 pairs | |
| d) 2.0 mm Undersized Crankpin Bearing | 8 pairs | |
| e) 2.5 mm undersize Crankpin Bearing | 16 pairs | |
| f) Main Journal Bearings | 8 pairs | |
| 3 | Daihatsu 5DC17 Standard Crankpin Diameter-145 mm | |
| a) 0.5 mm Undersized Crankpin Bearing | 14 pairs | |
| b) 1.0 mm Undersized Crankpin Bearing | 8 pairs | |
| c) 1.5 mm Undersized Crankpin Bearing | 8 pairs | |
| d) 2.0 mm Undersized Crankpin Bearing | 8 pairs | |
| e) 2.5 mm Undersized Crankpin Bearing | 8 pairs | |
| f) 3.0 mm Undersized Crankpin Bearing | 8 pairs | |
| g) Main Journal Bearings | 8 pairs | |
| 4 | Yanmar Engine 6N18AL-DN/DV Standard Crankpin Diameter-145 mm | |
| a) 0.40 mm Undersized Crankpin Bearing | 14 pairs | |
| b) 0.80 mm Undersized Crankpin Bearing | 8 pairs | |
| c) 1.60 mm Undersized Crankpin Bearing | 8 pairs | |
| d) 2.0 mm undersized Crankpin Bearing | 8 pairs | |
| e) 1.20 mm undersized Crankpin Bearing | 8 pairs | |
| 5 | Yanmar Engine –S 185 L Standard Crankpin Diameter-140 mm | |
| a) 0.8 mm Undersized Crankpin Bearing | 8 pairs | |
| b) 1.2 mm Undersized Crankpin Bearing | 8 pairs | |
| c) 1.60 mm Undersized Crankpin Bearing | 8 pairs | |
| d) 2.0 mm Undersized Crankpin Bearing | 8 pairs | |
| 6 | MAN 9ASL 25/30 Standard Crankpin diameter-195 mm | |
| a) 2.5 mm Undersized Crankpin Bearing | 8 pairs | |
| b) 3.0 mm Undersized Crankpin Bearing | 8 pairs | |
| c) 4.0 mm Undersized Crankpin Bearing | 6 pairs | |
| 7 | Allen Engine PVBCS12 F Standard Crankpin diameter – 190.40 mm | |
| a) 0.5 mm Undersized Crankpin Bearing | 8 pairs | |
| b) 1.0 mm Undersized Crankpin Bearing | 8 pairs | |
| 8 | Gas Engine Deutz MWM TBG32V16 Standard Crankpin diameter 204.50 mm | |
| a) 0.5 mm Undersized Crankpin Bearing | 8 pairs | |
| 9 | Daihatsu Model 8DKM28 Standard Crankpin diameter-235 mm | |
| a) 0.5 mm Undersized Crankpin Bearing | 8 pairs | |
| b) 1.0 mm Undersized Crankpin Bearing | 8 pairs | |
| c) 1.5 mm Undersized Crankpin Bearing | 8 pairs | |
| d) 2.0 mm Undersized Crankpin Bearing | 8 pairs | |
| e) 2.5 mm Undersized Crankpin Bearing | 8 pairs | |
| f) Standard size Bearing | 8 pairs | |
| 10 | Daihatsu Model 6DL-16 Standard Crankpin diameter-120 mm | |
| a) 2.0 mm Undersized Crankpin Bearing | 8 pairs | |
| b) 2.5 mm Undersized Crankpin Bearing | 8 pairs | |
| c) 3.0 mm Undersized Crankpin Bearing | 8 pairs | |
| 11 | MAK MODEL 8M20 Standard Crankpin diameter-152 mm | |
| a) 2.0 mm Undersized Crankpin Bearing | 8 pairs | |
| b) 2.5 mm Undersized Crankpin Bearing | 8 pairs | |
| c) 3.0 mm Undersized Crankpin Bearing | 4 pairs | |
| 12 | MAN 6L 23/30H Standard Crankpin diameter-185 mm | |
| a) 1.5 mm Undersized Crankpin Bearing | 8 pairs | |
| b) 2.0 mm Undersized Crankpin Bearing | 8 pairs | |
| c) 2.5 mm Undersized Crankpin Bearing | 8 pairs | |
| 13 | CKD Skoda 638A6S 2270 KVA Standard Crankpin diameter 280 mm | |
| a) 0.5 mm Undersized Crankpin Bearing | 12 pairs | |
| b) 1.0 mm Undersized Crankpin Bearing | 12 pairs | |
| c) 1.5 mm Undersized Crankpin Bearing | 12 pairs | |
| d) 2.0 mm undersized Crankpin Bearing | 12 pairs | |
| 14 | Cummins Model QSV 91G | 8 pairs |
| 15 | Ariel Compressor JGH/4 stroke 4.5 inch | |
| a) 0.5 mm Undersized Crankpin Bearing | 8 pairs | |
| b) 1.0 mm Undersized Crankpin Bearing | 8 pairs | |
| c) 1.5 mm Undersized Crankpin Bearing | 8 pairs | |
| 16 | Ariel Compressor JGH/4 stroke 4.5-inch Main Journal | |
| a) standard size Main Journal Bearing | 8 pairs | |
We proudly export Trimetal engine bearings and Babbitt white metal bearings to a wide range of countries across the Middle East, Caribbean, Asia, and Africa. We export to many countries, including Iraq, Iran, and the UAE (covering Dubai, Abu Dhabi, Sharjah, Ajman, Umm Al-Quwain, and Fujairah), as well as Oman, Saudi Arabia, Qatar, Bahrain, and Kuwait. In the Caribbean and surrounding regions, our exports reach nations such as Antigua and Barbuda, Belize, Dominica, the Dominican Republic, Grenada, Guyana, Haiti, Jamaica, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, and Trinidad and Tobago. Additionally, we serve key Asian and African markets including Malaysia, Indonesia, Madagascar, Vietnam, and South Korea, and many more.
Bearing Manufacturer: RA Power Solutions
Discover precision and quality with RA Power Solutions – Your trusted bearing manufacturer! Elevate your machinery’s performance with our top-notch bearings. From custom designs to off-the-shelf solutions, we offer a comprehensive range to meet your specific needs. Boost productivity, reduce downtime, and enhance reliability. Explore our bearings today!
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
Main journal bearings are critical engine components that support the crankshaft and allow it to rotate smoothly within the engine block. They reduce friction and wear between moving metal parts in internal combustion engines.
Use standard bearings when the crankshaft and housing dimensions match the original factory specifications. However, install undersize bearings—which are thicker—after grinding down the crankshaft due to wear or damage, as they restore proper clearances.
You can repair worn journal bearings through a process called rebabbitting, where you remove the old babbitt material and replace it with a new layer to restore the bearing to its original specifications and performance.
Undersize journal bearings are typically used after crankshaft regrinding, which reduces the journal diameter. These bearings compensate for the reduced size and help maintain correct oil clearance and engine performance.
Manufacturers commonly make journal bearings from babbitt metal, an alloy known for its excellent anti-friction properties. Other materials include copper-lead alloys, aluminum alloys, and composite materials, depending on the application.
