Oil-retaining bearing is using the most powder metallurgy oil-retaining bearing. Through the preparation powder, forming and sintering and dipping the lubricating oil and so on the main process made of sleeves are called powder metallurgy oil-retaining bearing.
Powder metallurgy oil-retaining bearing features are:
1. Suitable for mass production.
2. No cutting processing, save materials, the price is cheap.
3. Noise than rolling bearing low.
4. Almost can not for lubricating oil, can also through the collar wall penetration oil supply.
5. The high cost of mould, is not suitable for a few production.
6. Mechanical intensity is low.
7. Low friction factor.
Make this the collar of powder metallurgy material is called by grinding materials. According to the material, metallurgical powder by grinding materials into iron base, copper and aluminum 3 kinds. Iron base powder metallurgy by grinding materials to iron is given priority to, sometimes add a little copper, to improve the boundary lubrication performance. It is characteristic of high strength, the price is cheap, but bearing friction performance is poorer, and rust, only apply to the low speed occasions, and trunnion must quenching; Powder-metallurgy copper by grinding materials to bronze is given priority to, to join quality score for 6% ~ 10% of tin, and a small amount of zinc and lead. Its characteristic is not rust, in the middle, under the light load bearing stable performance, but the price is more expensive; Aluminum powder metallurgy by grinding material development is late, it is characteristic of the price is low, moderate strength, but wear resistance and resistance to hood the gender is poorer.




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