A clamping assembly comprising a bearing support member (16), the bearing support member being clampable to a shaft (2) by virtue of a clamping member (24) adaptable to tighten the bearing support member to the shaft, wherein at least a portion (16′) of the bearing support member (16) is disposable between a first abutment surface (28) provided on the clamping member and a second abutment surface (25) provided on the shaft; and wherein the portion (16′) of the bearing support member (16) comprises one or more protrusions (30) and one or more depressions (32) provided on an end face (16a, 16b) of the portion of the bearing support member, the protrusions and depressions being arranged to interface with one or more corresponding depressions (36) and protrusions (34) provided on one of the first abutment surface of the clamping member and the second abutment surface of the shaft, the respective protrusions and depressions being disposed so as to resist relative rotation between the shaft and the bearing support member.