Sleeve bearing arrangement

A bearing arrangement comprised mainly of a shaft and a sleeve bearing, wherein the sleeve bearing is formed of a steel-based metal, and the shaft is formed of a porous material obtained by a process comprising the steps of mixing degreased bran derived from rice bran with a thermosetting resin to form a mixture, kneading the mixture, subjecting the kneaded mixture to a primary firing in an inert gas at a temperature in the range of 700 to 1000° C., pulverizing the kneaded mixture obtained after the primary firing into carbonized powders, sieving the carbonized powders through a 100-mesh screen, mixing the sieved carbonized powders with a thermosetting resin to form a second mixture, kneading the second mixture, pressure-forming the second kneaded mixture at a pressure in the range of 20 to 30 MPa and subjecting the formed second kneaded mixture to heat treatment in an inert gas at a temperature in a range of 100 to 1100° C.

A bearing arrangement comprised mainly of a shaft and a sleeve bearing, wherein the sleeve bearing is formed of a synthetic resin, and the shaft is formed of a porous material obtained by a process comprising the steps of mixing degreased bran derived from rice bran with a thermosetting resin to form a mixture, kneading the mixture, subjecting the kneaded mixture to a primary firing in an inert gas at a temperature in the range of 700 to 1000° C., pulverizing the kneaded mixture obtained after the primary firing into carbonized powders, sieving the carbonized powders through a 100-mesh screen, mixing the sieved carbonized powders with a thermosetting resin to form a second mixture, kneading the second mixture, pressure-forming the second kneaded mixture at a pressure in the range of 20 to 30 MPa and subjecting the formed second kneaded mixture to heat treatment in an inert gas at a temperature in a range of 100 to 1100° C.