Grounding brush and associated assembly

A grounding brush comprising:

• an annular support including a mounting portion with opposing axial ends and two lateral flanks extending radially inwardly from a separate one of the two axial ends of the mounting portion such that an annular channel is defined between the two lateral flanks, each lateral flank including an internal face, an external face, an axial thickness defined between the internal and external faces, an inner circumferential surface defining a bore and a connecting surface extending between the internal face and the inner circumferential surface;
• and
• a plurality of circumferentially spaced conductive fibers each having an outer radial end disposed within the annular channel of the support and an inner radial end contactable with a shaft.