Patent ID: 8109701

Claim:
A cutting head ( 10 ) of a reamer having an axis of rotation (A) and a defined direction of rotation ( 12 ), the cutting head ( 10 ) comprising: a cutting head forward end ( 14 ), a cutting head rear end ( 16 ) distal the cutting head forward end ( 14 ) and a peripheral surface ( 18 ) therebetween, the peripheral surface ( 18 ) comprising at least two wiping pads ( 20 ) extending rearwardly from the cutting head forward end ( 14 ), a peripheral section located between two consecutive wiping pads ( 20 ), at least one peripheral section ( 24 ) being a cutting section ( 26 ), the cutting section ( 26 ) comprising: a chip evacuation flute ( 28 ) that extends rearwardly from the cutting head forward end ( 14 ); and a cutting edge ( 36 ) formed at the intersection of a rake surface ( 38 ) that generally faces the direction of rotation ( 12 ), and a relief surface ( 40 ), the cutting edge ( 36 ) extending from the adjacent wiping pad ( 20 ) to the cutting head forward end ( 14 ) and being transversely directed to the axis of rotation (A), wherein: a chip former ( 42 ) extends rearwardly from the rake surface ( 38 ); an axial land ( 60 ) extends rearwardly from a radially outermost rear end ( 62 ) of the chip former ( 42 ), the axial land ( 60 ) joins the chip evacuation flute ( 28 ) at a leading edge ( 64 ) of the axial land ( 60 ) and the wiping pad ( 20 ) at a trailing edge ( 66 ) of the axial land ( 60 ); the trailing edge ( 66 ) of the axial land ( 60 ) is located a second tangential distance ( 74 ) higher than a radially outermost end ( 41 ) of the cutting edge ( 36 ), as seen in a front view of the cutting head ( 10 ).