Abstract: To provide a rolling bearing having excellent rust prevention capability and capable of being used for a long period of time in a highly corrosion environment. A rolling bearing 1 utilized for a power generator which generates power from natural energy or for generator equipment has one or more bearing members which form the bearing having a rust prevention film formed in a predetermined region of a surface of a base material. The rust prevention film is formed by a porous film with a sacrificial anode action against the base material in the whole of the predetermined region. The porous film in a part or the whole of the predetermined region is subjected to sealing treatment which impregnates the porous film with a sealing treatment agent from a surface of the porous film. A surface of a sealing treatment body obtained from the porous film subjected to the sealing treatment is subjected to first coating treatment which coats the surface of the sealing treatment body with epoxy resin coating.

Abstract: To provide a rolling bearing having excellent rust prevention capability and capable of being used for a long period of time in a highly corrosion environment. A rolling bearing 1 utilized for a power generator which generates power from natural energy or for generator equipment has one or more bearing members which form the bearing having a rust prevention film formed in a predetermined region of a surface of a base material. The rust prevention film is formed by a porous film with a sacrificial anode action against the base material in the whole of the predetermined region. The porous film in a part or the whole of the predetermined region is subjected to sealing treatment which impregnates the porous film with a sealing treatment agent from a surface of the porous film. A surface of a sealing treatment body obtained from the porous film subjected to the sealing treatment is subjected to first coating treatment which coats the surface of the sealing treatment body with epoxy resin coating.

Abstract: Problems of an acoustic trouble and a bearing lock are solved by securing a guide clearance of a plastic cage (18) of a rolling bearing (10). The plastic cage (18) is divided at a part in a circumferential direction to provide an opening section (20). The circumferential length of the opening section (20) is set to the sum total of an extension by temperature variation, an extension by variation in water absorption, and a circumferential length for securing the guide clearance.

Abstract: A rolling bearing (100) is provided with a dynamic damper (60). A natural frequency of the dynamic damper (60) is caused to coincide with a natural frequency of vibration generated in an entire device. Consequently, it is possible to effectively suppress the vibration generated in the device.

Abstract: The designing of an annular integral type is established by forming a cage of a resin material that satisfies the condition (a) that the ratio of its linear expansion coefficient to that of bearing steel is not more than 2 or the condition (b) that its water absorption percentage is not more than 0.5%, or both conditions (a) and (b), thereby preventing the occurrence of abnormal sounds by stabilizing the behavior of a segment type cage for an ultrathin-walled rolling bearing.

Abstract: It is intended to suppress rattling in the fitted state of segments to improve operating efficiency in bonding the segments together. A cage composed of a plurality of arcuate segments, wherein a joining projection formed in the bonding section of one of adjacent segments is fitted in a joining recess formed in the bonding section of the other to thereby annularly bond the segments. In this cage, said joining projection and joining recess have tapered fitting surfaces as seen in a radial section, and the two fitting surfaces are closely contacted and joined together.

Abstract: It is intended to suppress rattling in the fitted state of segments to improve operating efficiency in bonding the segments together.

Abstract: To provide a resin-made ball retainer for a rolling bearing wherein improvement is made to the lubrication in a region between an inner surface of each of pockets and a corresponding ball to thereby suppress generation of vibrations and noises due to friction in that region, the resin-made ball retainer includes a plurality of pockets (3) defined in a plurality of portions of a ring-shaped or arcuate retainer body (1) so as to open at the inner and outer peripheral surfaces thereof for rollingly retaining corresponding balls (2) therein. Radial sides of an inner surface of each of the pockets (3) that are opposite to each other in a radial direction of the ball retainer are defined as spherical ball bearing surfaces (5) to which each ball contacts. Also, intermediate portions of the inner surface of each pocket with respect to the radial direction are defined as circumferential non-contact surface areas (6) where the corresponding ball (2) does not contact.

Abstract: The designing of an annular integral type is established by forming a cage of a resin material that satisfies the condition (a) that the ratio of its linear expansion coefficient to that of bearing steel is not more than 2 or the condition (b) that its water absorption percentage is not more than 0.5%, or both conditions (a) and (b), thereby preventing the occurrence of abnormal sounds by stabilizing the behavior of a segment type cage for an ultrathin-walled rolling bearing.