| 摘要 |
PURPOSE:To improve the anticorrosive property of a bearing exposed to a corrosive gas atmosphere, an organic gas atmosphere, water vapor and rainwater when used for a semiconductor manufacturing etching device, a food manufacturing machine, a paper mill or outdoor parking facilities. CONSTITUTION:An nickel electroplated or electroless-plated coat layer 5 is provided on at least one surface of an inner wheel 1, an outer wheel 2, a roller 3 and a holder 4 and a non-porous or black chrome plated coat layer 6 is provided thereon. |
