| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an angular ball bearing which reduces the design value of a guide space by reducing changes in the guide space during the high-speed rotation, and reduces the vibration and heat generation. <P>SOLUTION: The angular ball bearing 1 includes an outer ring 2, an inner ring 3, a plurality of balls 4 arranged between the outer ring 2 and the inner ring 3 at a contact angle α, and a holder 10 for holding the plurality of balls 4 at a predetermined interval in the circumferential direction. The guide system of the holder 10 is an outer ring guide system, and the guide space is ≤0.45% of the guide diameter of the holder. Further, the holder 10 is made of a synthetic resin material added with reinforcing fibers, in which a specific gravity is ≤2g/cm<SP>3</SP>, a flexural modulus is ≥12 GPa, and the coefficient of linear expansion is ≤5×10<SP>-5</SP>/°C. <P>COPYRIGHT: (C)2011,JPO&INPIT |
