DX bushing MP20 is a typical marginally-lubricated bearing material. Steel-backed ... other linkages, articulation joints, rear chassis hinges, fairleader rollers...Machine tool building industry: spindles in drill, grinding, and milling machines, ram ... of thermalexpansion11*10-6*K-1Friction coefficient0.05~0.20Dx bushing, dry bearing ,solid lubricants bearing