Patent ID: 8388226

Claim:
A housing for a dynamic bearing device, the dynamic bearing device comprising a housing formed with dynamic pressure generating grooves, a bearing sleeve fixed to an inner periphery of the housing, a rotary member rotatable relative to the bearing sleeve and the housing, a lubricant oil filled in the dynamic bearing device, and a seal space within which a surface level of the lubricant oil is maintained, wherein the lubricant oil is an ester-based lubricant oil, and wherein the housing is formed of a resin composition containing a linear polyphenylene sulfide (PPS) as a base resin and polyacrylonitrile carbon fibers, the resin composition containing Na ions in an amount of 2000 ppm or less and having a melting viscosity of 500 Pa·s or less at a temperature of 310° C. and a shear rate of 1000 s −1 .