An atherectomy device comprises a handle assembly, a rotatable first drive shaft (502) extending from the handle assembly, the rotatable first drive shaft (502) having a rotational axis, and a weight (506) disposed on a portion of the rotatable first drive shaft (502). The weight (506) has a center of mass eccentrically located relative to the rotational axis and is secured to the rotatable first drive shaft (502) with an elastically deformable material (508).
