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- October 27, 2025
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Crankpin & main journal Bearings of standard, undersize and special size are available in stock with RA Power Solutions. The most popular makes of engines like Daihatsu, Yanmar, MAN, Allen, CKD Skoda, Cummins, and Ariel Compressor crankpin and main journal bearings are available with us.
RA Power Solutions as a leading crankpin & main journal grinding company understands the importance of ready availability of undersize & special size bearings. We have experienced that in most cases undersized bearings are not available delaying the commissioning of the auxiliary or main engine on board the vessel even after the crankshaft is repaired.
In order to reduce the downtime and to keep the vessel moving we maintain the stock of undersize crankpin and main journal bearings of all popular make & models of auxiliary engine and main engine installed on the vessel.
We have illustrated below the example of a few makes & models of engines bearings that are available in stock.
| Sr.No | Description | Qty |
| 1. | MAN CME 5L 16/24 Standard Crankpin Diameter- 130mm a) 0.5 mm Undersized Crankpin Bearing b) 1.0 mm Undersized Crankpin Bearing c) 1.5 mm Undersized Crankpin Bearing |
4 pairs |
| 2. | Daihatsu 5DK20 Standard Crankpin Diameter-170mm a) 0.5 mm Undersized Crankpin Bearing b) 1.0 mm Undersized Crankpin Bearing c) 1.5 mm Undersized Crankpin Bearing d) 2.0 mm Undersized Crankpin Bearing e) 2.5 mm undersize Crankpin Bearing |
14 Pairs |
| 3. | Daihatsu 5DC17 Standard Crankpin Diameter-145mm a) 0.5 mm Undersized Crankpin Bearing b) 1.0 mm Undersized Crankpin Bearing c) 1.5 mm Undersized Crankpin Bearing d) 2.0 mm Undersized Crankpin Bearing e) 2.5 mm Undersized Crankpin Bearing f) 3.0 mm Undersized Crankpin Bearing |
14 pairs |
| 4. |
Yanmar Engine 6N18AL-DN/DV Standard Crankpin Diameter-145 mma) 0.40 mm Undersized Crankpin Bearing b) 0.80 mm Undersized Crankpin Bearingc) 1.60 mm Undersized Crankpin Bearing d) 2.0 mm undersized Crankpin Bearing |
16 pairs |
| 5. | Yanmar Engine –S 185 L Standard Crankpin Diameter-140 mm a) 0.8 mm Undersized Crankpin Bearing b) 1.2 mm Undersized Crankpin Bearing c) 1.60 mm Undersized Crankpin Bearing d) 2.0 mm Undersized Crankpin Bearing |
6 pairs |
| 6. | MAN 9ASL 25/30 Standard Crankpin diameter-195mm a) 2.5 mm Undersized Crankpin Bearing b) 3.0 mm Undersized Crankpin Bearing c) 4.0 mm Undersized Crankpin Bearing |
2 pairs |
| 7. | Allen Engine PVBCS12 F Standard Crankpin diameter – 190.40 mm a) 0.5 mm Undersized Crankpin Bearing b) 1.0 mm Undersized Crankpin Bearing |
4 pairs |
| 8 | Gas Engine Deutz MWM TBG32V16 Standard Crankpin diameter 204.50 mm a) 0.5 mm Undersized Crankpin Bearing |
4 pairs |
| 9. | CKD Skoda 638A6S 2270 KVA Standard Crankpin diameter 280 mm a) 0.5 mm Undersized Crankpin Bearing b) 1.0 mm Undersized Crankpin Bearing c) 1.5 mm Undersized Crankpin Bearing d) 2.0 mm undersized Crankpin Bearing |
12 pairs |
| 10 |
Cummins Model QSV 91G |
4 pairs |
| 11 | Ariel Compressor JGH/4 stroke 4.5 inch a) 0.5 mm Undersized Crankpin Bearing b) 1.0 mm Undersized Crankpin Bearing c) 1.5 mm Undersized Crankpin Bearing |
4 pairs |
| 12 | Ariel Compressor JGH/4 stroke 4.5-inch Main Journal a) standard size Main Journal Bearing |
3 pairs |
Globally Services:
We export Trimetal engine bearings for marine engines and Babbitt white 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 white metal bearing alloy in ingot form, bearings for yanmar engine,engine bearings for marine engines, bearings for Daihatsu engine, and bearing for engines contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.
FAQs:
Undersize bearings are bearings with a slightly smaller internal diameter (e.g., -0.5 mm, -1.0 mm) designed to fit crankpins or journals that have been ground down during repair. They’re needed when the journal diameter is reduced to bring it back within tolerance.
Only if the crankpin/main journal diameter remains within standard size tolerance. If it has been ground or machined to a smaller diameter, undersize bearings must be used to maintain proper clearance.
Because downtime is expensive and logistics are difficult in marine/industrial settings. Ready bearing stock (including common undersized sizes) means repairs can be completed quickly and operations resumed without long delays.
Bearings for major engine bearings for marine engines makes such as Daihatsu, Yanmar, MAN, Allen, CKD Skoda, Cummins, as well as for Ariel Compressors. Both crankpin bearings and main journal bearings in standard and undersize sizes are available.
You must measure the new journal diameter and compare it to standard size. If the diameter is reduced, select a corresponding undersize bearing that matches the new dimension and maintains correct clearance for oil film.