Abstract: A split cage includes a plurality of cage segments, each of the cage segments having a pair of rim portions, and a pair of cage bar portions, the cage bar portions and the rim portions defining a pocket that accommodates a tapered roller. Turning of each of the cage segments is guided by the tapered roller, the cage segments being arranged in a circular pattern along the circumferential direction of the split cage, in an annular space between an inner ring and an outer ring. A radial clearance between a radially inner portion of a pocket-side face, which is a side face of each of the cage bar portions, and the outer peripheral face of the tapered roller is set larger than an amount of change in the pitch circle radius of the cage segment when the cage segment is displaced radially outward due to thermal expansion.

Abstract: A split cage includes a plurality of cage segments each having a pair of rim portions and a pair of cage bar portions, the cage bar portions and the rim portions defining a single pocket that accommodates a single tapered roller. Turning of each of the cage segments is guided by the tapered roller, the cage segments being arranged in a circular pattern along the circumferential direction of the split cage, in an annular space between inner and outer rings. Each cage segment has projections formed so as to project radially inward from the pocket, and formed at the rim portions. A projecting length of each projection is set to such a length that the projection is brought into contact with an outer peripheral side portion of the inner ring before the cage segment is detached from the tapered roller when the cage segment is displaced to the radially inside.

Abstract: A split cage includes a plurality of cage segments, each of the cage segments having a pair of rim portions, and a pair of cage bar portions, the cage bar portions and the rim portions defining a pocket that accommodates a tapered roller. Turning of each of the cage segments is guided by the tapered roller, the cage segments being arranged in a circular pattern along the circumferential direction of the split cage, in an annular space between an inner ring and an outer ring. A radial clearance between a radially inner portion of a pocket-side face, which is a side face of each of the cage bar portions, and the outer peripheral face of the tapered roller is set larger than an amount of change in the pitch circle radius of the cage segment when the cage segment is displaced radially outward due to thermal expansion.

Abstract: A split cage includes a plurality of cage segments each having a pair of rim portions and a pair of cage bar portions, the cage bar portions and the rim portions defining a single pocket that accommodates a single tapered roller. Turning of each of the cage segments is guided by the tapered roller, the cage segments being arranged in a circular pattern along the circumferential direction of the split cage, in an annular space between inner and outer rings. Each cage segment has projections formed so as to project radially inward and formed at the rim portions. A projecting length of each projection is set to such a length that the projection is brought into contact with an outer peripheral side portion of the inner ring when the cage segment starts rotating.

Abstract: A split cage includes a plurality of cage segments each having a pair of rim portions and a pair of cage bar portions, the cage bar portions and the rim portions defining a single pocket that accommodates a single tapered roller. Turning of each of the cage segments is guided by the tapered roller, the cage segments being arranged in a circular pattern along the circumferential direction of the split cage, in an annular space between inner and outer rings. Each cage segment has projections formed so as to project radially inward from the pocket, and formed at the rim portions. A projecting length of each projection is set to such a length that the projection is brought into contact with an outer peripheral side portion of the inner ring before the cage segment is detached from the tapered roller when the cage segment is displaced to the radially inside.

Abstract: To provide a cage for a rolling bearing in which the rolling bearing is lubricated, for example, by a combination of oil bath lubrication and a forced-feed oiling pump, and even when the forced-feed oiling pump is stopped, a defective lubrication can be prevented, and also to provide a bearing for wind power generation which is provided with this cage. Lubricating oil sumps 24 are provided at a larger-diameter ring 21 of a cage 14. Each lubricating oil sump 24 is provided between a tapered roller 13 and a tapered roller 13 so as not to abut with the tapered roller 13. With this arrangement, when the lubricating oil sump 24 is located in lubricating oil stored at a lower portion of the bearing, the lubricating oil is held in the lubricating oil sump, and in accordance with subsequent rotation, the lubricating oil held in the lubricating oil sump 24 is allowed to drop.

Abstract: Deep groove ball bearings are used as bearings supporting both side portions of a worm. In the first bearing on the side of a motor, the curvature radius of a raceway groove in an inner ring or the curvature radius of a raceway groove in an outer ring are set to a specific numerical range with respect to the diameter of a ball.

Abstract: Deep groove ball bearings are used as bearings supporting both side portions of a worm. In the first bearing on the side of a motor, the curvature radius of a raceway groove in an inner ring or the curvature radius of a raceway groove in an outer ring are set to a specific numerical range with respect to the diameter of a ball.