Abstract: The invention relates to a large rolling bearing, more particularly an open-center large rolling bearing, comprising two concentric running rings, between which a plurality of rolling elements is provided in a bearing gap, which rolling elements roll on at least two raceways. More particularly, the bearing gap between the running rings and/or between at least one running ring and the rolling elements is at least partially filled with a solid lubricant, which comprises a polymer matrix and a lubricant embedded therein.

Abstract: A cage for a ball bearing is optimized for high-speed applications. To reduce weight, the cage is formed by a number of conical blades which collectively form an “X” shape. To add rigidity, a number of gussets are placed between the blades at various circumferential locations. The light weight reduces the centrifugal forces for a given diameter and rotational speed. The rigidity permits the cage to withstand the centrifugal forces without excessive deflection or stress.

Abstract: A wave generator of a strain wave gearing uses a plurality of solid displacement elements to flex a flexible externally toothed gear into a non-circular shape and partially mesh the externally toothed with a rigid internally toothed gear. The solid displacement elements are obtained by curving a monomorphic or bimorphic type rectangular plate-shaped element into an arc shape and can be deformed from an arc shape to a semispherical shape by energization, the semicircular shape having a smaller radius than the arc radius of the arc shape. A wave generator can be realized, which can bear a large load torque by utilizing changes in rigidity, deformation amount, and deformation force associated with the deformation of the solid displacement elements.

Abstract: A cage for a ball bearing is provided with a wire having a first group of heels spaced apart in the circumferential direction and form a first discontinuous ring, a second group of heels spaced apart in the circumferential direction and form a second discontinuous ring, and a plurality of connecting portions extending between one of the heels of the first group and second group. The connecting portions and the heels of the first group and/or the second group delimit a plurality of spaces each intended to receive a ball of the bearing. The cage also provides at least one interposed part disposed inside each space and is provided with a body for accommodating a ball and coupling means for fastening the body to at least one of the connecting portions of the wire. Each of the bodies of the interposed parts fully positioned in the circumferential direction.

Abstract: A rolling bearing assembly including a wire cage is provided. The assembly includes a radially inner ring including a first filling slot and a radially outer ring including a second filling slot. The first and second filling slots and a radial distance defined between radially inner ring and the radially outer ring are dimensioned to receive the spherical rolling elements. The wire cage includes first and second wires that extend around opposite axial sides of each of the spherical rolling elements in an alternating manner. The first and second wires overlap each other in areas between adjacent ones of the spherical rolling elements, and crimping elements affix the first and second wires together in each of the areas between the adjacent rolling elements.

Abstract: A retainer portion of a cage of a bearing has a plurality of spokes and web sections extending between an outer ring section and an inner ring section with a plurality of cavities formed on an annular side face of the retainer portion. The cavities communicate with socket portions formed in the retainer portion to provide lubrication to rotational elements of the bearing. A latch and catch mechanism secures like retainer portions together to form a cage of the bearing.

Abstract: Cage 4 for a ball bearing, comprising an annular heel 7 and a substantially axial portion 8 provided with claws 11 defining pockets 9 for balls and connected to the heel 7, the substantially axial portion 8 extending axially over a part of the pockets 9. The substantially axial portion 8 has an outside diameter smaller than the outside diameter of the heel 7, the outside diameter of the substantially axial portion being somewhere between the pitch circle diameter of the cage reduced by half the radial thickness of the heel and the pitch circle diameter of the cage increased by half the radial thickness of the heel.

Abstract: A ball bearing for a small size fan for supporting an axis of rotation of an impeller is formed of four or five balls (21), a crown-shaped cage (25), an inner ring (22), and an outer ring (23). By using an optimized number of the balls (21) under the working condition of a ball bearing for a small size fan, structually useless portions are eliminated. Further, by adopting the crown-shaped cage (25), reduction of the cost and the friction torque is attained, and a ball bearing having necessary and sufficinet durability is provided. By incorporating the ball bearing in a small size fan, reduction of the cost, simplification of the structure, and reduction of the electric power consumption of the small size fan are facilitated, thereby improving the commerciality as a small size fan.

Abstract: A two row, integral pathway, angular contact ball bearing has a single separator to handle both ball rows, but without significant limitation on the total ball count and load capacity. The theoretical full complement ball count is determined, that is, the largest number of balls that could be installed in the first row. The largest even number equal to or smaller than the full complement count is then determined, and chosen for the total number of separator pockets. The separator pockets are formed by adjacent axial fingers, long enough to reach both ball rows, and joined by circumferentially alternating bights. Therefore, at each end of the separator, half the pockets are open, and half closed. When the first ball row is installed against one pathway of the inner race, there is no access limitation, and all pockets, open and closed, are filled. Then, the separator is shifted back to clear the other pathway, before the outer race is inserted over the inner race.

Abstract: A harmonic drive apparatus comprises a circular spline which has internal spline teeth and which is rotatable around a rotational axis, a flexible cylindrical flexspline which is concentrically disposed within the circular spline and which has external spline teeth, the number of flexspline external teeth being less than the number of internal teeth of the circular spline, a wave generator disposed within the flexspline for flexing the flexspline in the radial direction thereof so as to locally engage the flexspline external teeth with the internal teeth of the circular spline, and a multi-row ball bearing flexible in the radial direction thereof which has balls equally spaced along the circumferential direction of the wave generator and which is disposed between the wave generator and the flexspline, the balls being disposed in a plurality of circumferential lines which are separated from one another along the axial direction of the wave generator, the balls in each circumferential line being disposed betwee