PM Oil Impregnated Bearings

Oil-impregnated bronze bushings are self-lubricating bushings produced through the powder metallurgy process. The bronze powder is compacted to prepare a porous part and by way of sintering of the Bronze particles are connected which causes high porosity. These pores are then filled with a lubricating liquid by vacuum, resulting in a reserve that continuously lubricates when in use.

When in use, the rotation of the shaft and the heat generate oil to draw in towards the bearing surface of the bush, forming a stable lubricant film that allows for motion support with very low friction and minimal wear while having no external lubrication. Once the system shuts down, the oil naturally reabsorbs into the pore network. Offering maintenance-free operation, high load-carrying capacity, and exceptional durability, oil-impregnated bronze bushings are utilized in electric motors, power tools, small engines, pumps, and general industrial machinery

Overview:

Ideal for:

Maintenance-free applications

Sealed systems

Noise-sensitive products

Long service life requirements

Key Advantages:

Reduced Noise

Compared to conventional bearing, oil-impregnated bronze bushing releases lubricating oil during operation, reducing friction and ensuring quieter performance.

Excellent Corrosion Resistance

Sintered bronze bushing offers excellent corrosion resistance due to the natural properties of bronze and the protective effect of the lubricating oil, which helps prevent rust.

Long Service Life

Oil-impregnated bronze bearings are protected by lubricating oil during operation, resulting in low friction, minimal wear, extended service life, and reduced maintenance costs.

Available Materials:

Bronze

Iron-Copper

Graphite-Containing Materials

Applications of Oil Impregnated Bushings：

Sintered bronze bushings offer excellent self-lubrication, corrosion resistance, long service life, and low noise, making them ideal for use across various fields:

Household Appliances: electric fans, air conditioners, juicers, coffee machines

Automobiles: engines, transmissions, steering gears, brake systems

Power Tools: electric scissors, electric saws, electric drills

Industrial Equipment: agricultural machinery, textile machinery, conveyors, forestry machinery

FAQ:

What oil content can be achieved?

Typically 15-25% depending on material and density.

For more customized powder metallurgy parts, contact us freely.