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engine bearing for komatsu
1. Bearing material
2.MAIN BEARING
In a piston engine, the main bearings are the bearings on which the crankshaft rotates, usually plain or journal bearings. The bearings hold the crankshaft in place and prevent the forces created by the piston and transmitted to the crankshaft by the connecting rods from dislodging the crankshaft, instead forcing the crank to convert the reciprocating movement into rotation.
While some small single-cylinder engines have only one main bearing, designed to deal with the bending moment exerted by the crank as a result of the force from the connecting rod, most engines have at least two main bearings, one at each end of the crank shaft and may have as many as one more than the number of crank pins. Increasing the number of bearings in an engine will generally increase the size and cost of the engine, but also provides stability to the crankshaft, which would otherwise have to endure greater bending moments from having the crank pin further from a bearing. The combination of bearing number and crankshaft design can also have an effect on engine balance; a more stable crankshaft will better avoid unbalance from flexing, but increasing the crankshaft length or girth to accommodate an additional bearing increases the rotational inertia of the crankshaft, which can have the opposite effect.
3. working conditions
1)The high alternating load
2)High Sliding friction velocity and high temperature
3)In three states of a liquid, semi-liquid and dry friction alternating
4)Corrosion lubricant
5)Abrasive friction
6)The function of edge loads
7)Static load
4.Features:
1. Aluminum based alloy or copper based alloy and Babbitt
2. Good resistance to corrosion
3. High thermal conductivity
4. High fatigue strength
5. Plating, size and other performance reach OE standard
6. Outside diameter from 21MM to 305MM
7. STD, 010, 020, 030, 040, 050 (STD, 0.25, 0.50, 0.75, 1.00, 1.25)
8. DIN/ISO4383 and ISO/TS16949 certificated
5. Related products
6. Other models for Japanese car
such as: Toyota, Hino, Komatsu, Nissan,Mitsubishi,Mazda , Isuzu ect
7. Factory equipment
8. Good comment from our customers
9. Our business fair
We can develop new items by samples our
drawings with your any special requirements.
10. Contact me for me details