A pre-tensioned bearing assembly, including: a first rolling bearing including a first outer ring, first inner ring including a first conical surface, and a plurality of rolling elements radially disposed between the first inner and outer rings; a second rolling bearing including a second outer ring, a second inner ring including a second conical surface, and a plurality of rolling elements radially disposed between the second inner and outer rings; a shaft including a shoulder in contact with the second rolling bearing; a first conically-shaped sleeve in contact with the first conical surface and the second conical surface, and including a cylindrical inner surface; a second conically-shaped sleeve in contact with the cylindrical inner surface; and a shaft nut including an internal thread in cooperation with the shaft, and fixing the first inner ring and the second inner ring axially onto the shaft.

A bearing includes a plurality of rolling elements (26) spaced around a three-hundred and sixty degree circumferential extent of the bearing. An odd, non-singular number of high-points are positioned as near to evenly as possible about the circumferential extent of the bearing, the high-points defined by locations at which rolling elements with the largest diameters are positioned. An odd, non-singular number of low-points are positioned as near to evenly as possible about the circumferential extent of the bearing, the low-points defined by locations at which rolling elements having the smallest diameters are positioned. The odd, non-singular number of high-points is the same as the odd, non-singular number of low-points, and each low-point is positioned as near to evenly as possible between two adjacent high-points.

A shaft assembly is disclosed herein. The assembly includes a shaft, an outer housing, a bearing assembly, and a preload spring. The bearing assembly includes an inner ring mounted on the shaft and defining an inner raceway. An outer ring defines an outer raceway and an annular groove, and the outer ring is arranged within the outer housing. A plurality of rolling elements are arranged between the inner raceway and the outer raceway. The preload spring includes: a washer body positioned within the annular groove of the outer ring, and a flange extending axially from the washer body and contacting the outer housing.

Provided is a rotational torque inspection method for a bearing device for vehicle wheel that enables detection of an abnormality in a component or step occurring midway in the manufacturing of the wheel bearing device. This rotational torque inspection method for a wheel bearing device 1 comprises: a press-fitting step S02; a post-press-fitting rotational torque measurement step S04 for measuring a rotational torque T1 of the wheel bearing device 1 when, after the press-fitting step S02, the hub ring 3 and the inner ring 4 that are inner members and an outer ring 2 that is an outer member are rotated in a relative manner; and a post-press-fitting rotational torque determination step S05 for determining the fitness of the rotational torque T1 by whether or not the rotational torque T1 measured in the post-press-fitting rotational torque measurement step S04 is within a range of standard values S1.

A bearing raceway for a shaft includes a tubular sleeve comprising a raceway section and a clamp section, the raceway section having a hardened outer surface and a first, axially linear, inner surface, and the clamp section having first threads and a second, axially non-linear, inner surface, where the first threads are configured to mate with second threads on a nut to clamp the tubular sleeve to the shaft.

A system for providing a load on a bearing mounted to a shaft includes an attaching member releasably connectable to the shaft and a press mechanism in fluid communication with a source of fluid and configured to provide a compressive load to the bearing. The press mechanism includes a switch having a base and a piston in communication with the fluid such that an increase in a pressure of the fluid results in the piston extending upwardly from the base and a decrease in the pressure of the fluid results in the piston retracting toward the base. The switch includes a lower proximity sensor and a higher proximity sensor. The piston is configured to extend upwardly from the base past the lower proximity sensor and to trip the higher proximity sensor. The switch is configured to control the increase in the pressure in response to the piston tripping the higher proximity sensor.

A method for spin set bearing setting verification in a preload state on a shaft. An inertia wheel may be disposed on the shaft. The inertia wheel or the shaft is rotated. A first rotational speed is measured at a first time. The inertia wheel may decelerate over time to achieve a second rotational speed measured at a second time. The second speed is less than first speed. The change in time between the first time and the second time is measured. The bearing setting may be adjusted if the change in time is outside a predetermined time range. The bearing setting may remain unchanged if the change in time is within a predetermined time range.

A joint bearing for a robot 1 which comprises a shaft 21 and at least one link element 24, 35, 36, 37, 38, 59, 60 mounted to be rotatable on shaft 21 between two axial bearings 22, 23, 43, 44, 45, 46, 54, 55, 63, 64, 69, where a resiliently compressible preloading element 33, 49, 52, 53, 56, 57, 65, 66 is provided which applies an axial preloading force to the axial bearings. A robot with at least one such joint bearing as well as a method for assembling a joint bearing for a robot are disclosed herein.

The rotational torque inspection method for a bearing device comprises: a press-fitting step (S02); a first bearing preload value calculation step (S03) for calculating a first bearing preload value (P1); a post-press-fit rotational torque measurement step (S05) for measuring a post-press-fit rotational torque (Ta); a crimping step (S06) for crimping the small diameter step part to the inner ring; a post-crimping rotational torque measurement step (S07) for measuring a post-crimping rotational torque (Tb); a second bearing preload value calculation step (S08) for calculating a second bearing preload value (P2); and a determination step (S09) for determining the suitability of the preload depending on whether or not the second bearing preload value (P2) is within a range of a reference value.

Provided is a bearing for a wind turbine, including a first and a second ring arranged radially to each other with one ring rotating relative to the other ring around an axis of rotation. The first ring has a cylindrical ring section and a collar extending radially from the ring section. The collar has an axial support area supporting axial bearing elements, wherein several pretension elements creating compressive stress are fixed to the first ring in the section where the collar extends from the ring section.