DJA MOND bronze and iron sintered bushings

Sintered self-lubricating bearings are produced using state-of-the-art powder metallurgy processes. Each sintered bushing has a controlled porous structure impregnated with oil, which is gradually released during operation, creating a continuous self-lubricating film. The oil can be completely or partially replaced by graphite, resulting in a drier surface appearance and a darker colour.

Sintered bushings are self-lubricating plain bearings featuring an oil-impregnated porous structure. They are ideal for high rotational speeds and low-load applications, offering maintenance-free operation. Manufactured using state-of-the-art powder metallurgy processes, each bushing features a controlled porous structure that gradually releases oil during operation, creating a continuous self-lubricating film. The oil can also be partially or completely replaced with graphite, resulting in a drier surface appearance and darker colour. Compared with other self-lubricating materials (solid bronze, PTFE or engineering polymers), sintered bushings are generally recommended for applications involving high rotational speeds and low loads.

The effective porosity of these sintered bushings represents 25–30% of the total volume and can be reduced to 18% to improve mechanical strength under very high static loads. The bushings are impregnated with a selected oil, vacuum-saturated after calibration, which can be partially replaced by graphite as previously described. Machining is generally not recommended, as it can damage the porous structure. If machining is required, carbide tools must be used with approximately 7° front and side clearance angles, low cutting depths and feed rates, at a cutting speed of 100 m/min. Available surface treatments include electroplating, bluing, steam oxidation and heat treatments.