A surgical instrument includes a cutting member with an implement for
cutting tissue, and a drive coupled to the cutting member. The drive may
include a drive member having a helical groove and being attached to the
cutting member. Furthermore, the drive may include an inner drive hub
coupled to the drive member such that the drive member rotates with the
inner drive hub while being free to translate relative to the inner drive
hub. The drive simultaneously rotates and translates the cutting member
in response to a force applied to the drive.