Abstract: A ball bearing and housing assembly includes a shaft having a stepped bore extending therethrough. The stepped bore is defined by a first bore segment having an inboard cylindrical interior surface that has a first bore diameter. The first bore segment extends from a shaft end and terminates at a shoulder. The shoulder is axially located between a first radial centerline of a plurality of balls and an inner axial end. The stepped bore is further defined by a second bore segment having an outboard cylindrical interior surface that has second bore diameter. The second bore segment extends axially from the inner axial end towards the shaft end and terminates at the shoulder. The second bore diameter is greater than the first bore diameter. A fastener is fitted through the first bore segment and threaded into a housing.

Abstract: A clutch unit includes a lever-side clutch part that controls transmission and interruption of rotational torque input through a lever operation, and a brake-side clutch part that transmits the rotational torque from the lever-side clutch part to an output side, and interrupts rotational torque reversely input from the output side. The brake-side clutch part includes an outer ring, which is constrained in rotation, an output shaft that outputs the rotation, and a cylindrical roller that controls the interruption of the rotational torque reversely input from the output shaft and the transmission of the rotational torque input from the lever-side clutch part through engagement and disengagement between the outer ring and the output shaft. The output shaft includes a slide gear, which meshes with a side plate during interruption of the rotational torque and does not mesh with the side plate during transmission of the rotational torque.

Abstract: Apparatuses and methods are provided for facilitating air-cooling of, for instance, one or more electronics racks within a data center. The apparatus includes an air-moving assembly and an auxiliary turbine drive. The air-moving assembly includes a shaft, one or more mechanical fans coupled to the shaft to rotate, at least in part, with the shaft, and a motor coupled to the shaft to rotatably drive the shaft. The auxiliary turbine drive is coupled to the shaft of the air-moving assembly to provide backup rotational energy to the shaft to facilitate continued rotation of the shaft during interruption in power to the motor. In one implementation, the auxiliary turbine drive is configured to facilitate, for a specified time period, continued rotation of the shaft at a specified percentage, or greater, rotational speed of the shaft compared with a shaft speed when rotatably driven by the motor.