Abstract: The invention relates to a device (10) for conducting hydraulic fluid from a first connection (42, 44) to a second connection (38, 40) via at least one conduit (56, 58), having a housing comprising a first housing part (10a) having the first connection (42, 44) and a second housing part (10b) having the second connection (38, 40), which parts can be rotated relative to each other about an axis of rotation (10c) and have a hydraulic rotating union for transferring the hydraulic oil, and securing means (50, 52) are provided for securing the device (10) laterally to a torque motor (20), which comprises a first part (20a) and a second part (20b) that can be pivoted relative to the first part (20a), said first housing part (10a) having a central housing (66), said second housing part (10b) having a central body (68), and said central housing (66) and said central body (68) mutually engaging and being rotatably mounted relative to each other.

Abstract: The invention relates to a device (10) for conducting hydraulic fluid from a first connection (42, 44) to a second connection (38, 40) via at least one conduit (56, 58), having a housing comprising a first housing part (10a) having the first connection (42, 44) and a second housing part (10b) having the second connection (38, 40), which parts can be rotated relative to each other about an axis of rotation (10c) and have a hydraulic rotating union for transferring the hydraulic oil, and securing means (50, 52) are provided for securing the device (10) laterally to a torque motor (20), which comprises a first part (20a) and a second part (20b) that can be pivoted relative to the first part (20a), said first housing part (10a) having a central housing (66), said second housing part (10b) having a central body (68), and said central housing (66) and said central body (68) mutually engaging and being rotatably mounted relative to each other.

Abstract: The invention relates to a spindle motor, preferably for driving a hard disk drive, having a stationary motor component and a rotatable motor component that is rotatably supported with respect to the stationary motor component and that is driven by an electromagnetic drive system, at least one storage disk being fixed to the rotatable motor component using some means of mounting and fastening. According to the invention, at least parts of the rotatable motor component and at least parts of the means of mounting and fastening have a wear resistant surface coating or are subjected to a wear resistant surface treatment.

Abstract: The invention relates to a spindle motor, preferably for driving a hard disk drive, having a stationary motor component and a rotatable motor component that is rotatably supported with respect to the stationary motor component and that is driven by an electromagnetic drive system, at least one storage disk being fixed to the rotatable motor component using some means of mounting and fastening. According to the invention, at least parts of the rotatable motor component and at least parts of the means of mounting and fastening have a wear resistant surface coating or are subjected to a wear resistant surface treatment.