Bush is generally a "soft" than the connecting rod bushing materials such as copper that can avoid iron sharpens iron can improve the service life, and even the rod bushing is worn out, can change the set of low cost and good economy, so it is in the Bush more wear to extend the life of the connecting rod. It can also be said to save its cost, of course, there are ductile iron connecting rod bushings, wear resistance is also very good.

The use of bushings reduces wear, vibration and noise, and has an anti-corrosion effect. The use of bushings can also facilitate the maintenance of mechanical equipment and simplify the structure and manufacturing process of equipment. Bushings play a role in practical work, and its application environment and purpose have a lot to do with. The connecting rod and the bushing also have the main function of vibration, noise reduction, fatigue reduction and service life, and play a vital role in the operation stability of the vehicle. Therefore, the function of the connecting rod bushing is to protect the connecting rod, improve the service life of the connecting rod, save the maintenance cost of the engine and reduce the engine economy.