Abstract: Disclosed is a circular profiled anti-rotation washer. The anti-rotation washer includes a step profile locking mechanism on a first surface. The anti-rotation washer provides a central axial aperture for receiving a threaded shaft. The step profile is a D-shaped profile and allows the washer to engage with an arm in a positive locking mechanism.

Abstract: A bearing unit includes two hydro-deflector sealing systems, each positioned on opposite axial ends of the bearing unit. Each hydro-deflector sealing system includes an external seal having a first radially outer lip, a second radially outer lip, and a radially inner anchoring lip formed at an opposite end. An angled connecting portion connects the second radially outer lip to an intermediate portion that extends to the radially inner anchoring lip. At least two ridges are formed on the intermediate portion. The first and second radially outer lips and the angled connecting portion define a W-shaped groove that deflect contaminants away. The hydro-deflector sealing system also has an internal seal having a primary lip, an anchoring lip formed, an intermediate portion connecting the primary lip and the anchoring lip, and a secondary lip toward the external seal that does not contact the external seal under normal operating conditions.

Abstract: Disclosed is a circular profiled anti-rotation washer. The anti-rotation washer includes a step profile locking mechanism on a first surface. The anti-rotation washer provides a central axial aperture for receiving a threaded shaft. The step profile is a D-shaped profile and allows the washer to engage with an arm in a positive locking mechanism.

Abstract: Disclosed is a fastener assembly to avoid accidental loosening due to vibrations. The fastener assembly includes a circular profiled locking washer and a lock nut. The locking washer is detachably attachable to an arm. The locking washer provides a plurality of leaf-shaped grooves on a first surface, and a central axial aperture for receiving a threaded shaft. The lock nut further provides a plurality of spring loaded balls on a surface facing the first surface of the locking washer. During operation, the lock nut is tightened on the threaded shaft by rotating in clockwise direction, and cessation of rotation, latches the plurality of spring loaded balls with the plurality of leaf-shaped grooves to lock the lock nut, and hence to withstand counter-rotative torque on the lock nut caused by vibrations.