A high speed planer head. Disclosed according to one aspect of the
invention is a hub and a threaded member. The hub is axially disposed for
rotation about an axis, and has a pocket for receiving a first knife
against a supporting wall of the pocket. The threaded member has a
frustoconical ramping portion for producing a wedging force against the
knife when the threaded member is threaded into a threaded hole in the
hub. According to another aspect of the invention, a second hub for
carrying a second knife is provided, the second hub preferably being
bolted to the first hub to that the hubs can be disassembled. The second
knife preferably has two linear cutting edges and the second knife
preferably has at least two curvilinear cutting edges and more preferably
has four concave, semi-circular cutting edges that are spaced apart from
one another with 90 degree rotational symmetry.