| 摘要 |
PURPOSE:To provide the sealing device of a roll bearing whose wear coefficient is made low and whose rotary torque is reduced and whose sealing performance is improved. CONSTITUTION:Deep groove ball bearings 2 are provided on both end sides of a shaft 1, and a needlelike roller 4 with a retainer is provided on the inside of each deep groove ball bearing 2, and a cover 5 is provided on the outside of each deep groove ball bearing 2. A step difference portion is formed on the inside of each cover 5, and a seal 6 is fitted thereto. Each seal 6 is formed of a lubricous rubber composite whose combination is made up of thermoplastic fluoro resin as a first indispensable element, fluoric rubber as a second indispensable element and a fluoric polymer of a low molecular weight as a third indispensable element. |
