Where are the oil-free bushings and bearings used? Or under what circumstances use oil-free bushings, what are the characteristics?
The oil-free bushing is very white. It is a modification of the copper bushing. In the design, if the light load, we will choose the copper bushing and the oil-free bushing.
Most oil-free bushings today are steel plates, sintered spherical bronze powder in the middle, and surface gear pump bushings are sprayed with other substances such as a mixture of polytetrafluoroethylene (PTFE) and lead engine bushings. Low friction coefficient, good wear and corrosion resistance and no oil lubrication. Mostly used for sliding parts of various machinery, such as printing presses, textile machines, and fitness equipment hydraulic trucks. Some bushings are treated with a special process bushing that can withstand high-speed movement but cannot withstand heavy loads.

Oilless bearings are generally designed for use at low loads and low speeds of up to 1000 rpm.