Patent ID: 7121769

Claim:
A rotary slot milling cutter having an axis of rotation A comprising a disk shaped tool body having a plurality of cutting portions; each cutting portion comprising an insert pocket and a cutting insert; the cutting insert being removably mounted in the insert pocket; the cutting insert comprising a top face and a bottom face; the bottom face comprising two spaced-apart abutments, with a ceiling formed therebetween, each abutment comprising an abutment platform and a side-slope; the insert pocket having a pocket base which generally faces a direction along the axis of rotation and comprises two support surfaces and a radially extending rib disposed therebetween, the rib comprising a roof and two banks; wherein when the cutting insert is mounted in the insert pocket, the abutment platforms abut the support surfaces, and a gap exists between the roof of the rib and the ceiling, and between each side-slope and adjacent banks.