Patent ID: 8872509

Claim:
An electric motor assembly comprising: a motor shaft rotatable about a longitudinal axis, the motor shaft having an axial keyway formed therein, and the axial keyway having a nominal keyway dimension corresponding to a keyway width defined between interior sidewalls of the keyway; an angular position sensor rotor coupled to the motor shaft to rotate with the motor shaft, the angular position sensor rotor having an axial key to fit within the axial keyway of the motor shaft, and the axial key having a nominal key dimension that is less than the nominal keyway dimension, the nominal key dimension corresponding to a key width defined between exterior sidewalls of the axial key; and a deformable pin located in the axial keyway and under compression between the axial key and the axial keyway of the motor shaft, the deformable pin inhibiting rotational shifting of the angular position sensor rotor relative to the motor shaft, wherein the deformable pin is compressed between one of the interior sidewalls of the keyway and one of the exterior sidewalls of the axial key.