Patent ID: 9556904
Date: 2017-01-31
CPC Classifications: F16C

Claim:
1. A sintered bush made of porous metallic sintered body, wherein the porous metallic sintered body comprises: an iron (Fe) based matrix containing a martensite structure; and metal matrix of copper (Cu), tin (Sn), nickel (Ni), and carbon, wherein the sintered bush is used under a contact pressure of 8 kg/mm wherein a lubricant is impregnated in pores of the porous sintered body, the lubricant having an oil separation rate of 5 to 10 wt % at an operational temperature of 70 to 80 degrees Celsius, wherein the lubricant includes a wax of 20 wt %, a thickener of 10 to 20 wt %, an additive of 2 wt %, and a residual amount of base oil and being semisolid or solid at room temperature, wherein the wax has a softening temperature of 150 degrees Celsius or less and a weight average molecular weight of 300 to 4000.