Patent ID: 8398341

Claim:
A cutting head ( 10 ) of a reamer having an axis of rotation (A) defining a forward-to-rear direction and 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 ( 22 ) extending rearwardly from the cutting head forward end ( 14 ), the peripheral surface ( 18 ) between two adjacent wiping pads forming a peripheral section ( 58 ), and at least one cutting section ( 20 ) located adjacent the cutting head forward end ( 14 ) comprising: a cutting edge ( 30 ) extending from the cutting head forward end ( 14 ) in a rearward and radially outward direction to the peripheral surface ( 18 ), the cutting edge being formed at an intersection of a rake surface ( 32 ) and a relief surface ( 34 ), the rake surface ( 32 ) being generally tangentially directed, facing a direction of rotation (B) and having a rake surface first end ( 40 ) that is distal from the cutting edge ( 30 ), a deflecting surface ( 38 ) adjacent the rake surface ( 32 ) and generally transverse thereto, the deflecting surface ( 38 ) extending from the rake surface first end ( 40 ) in a direction away from the cutting edge ( 30 ), wherein: the deflecting surface ( 38 ) makes an acute axial angle (α) with respect to the axis of rotation (A) such that an imaginary extension of the deflecting surface ( 38 ) intersects the axis of rotation (A) at a point forward of the cutting head, and a rear end ( 41 ) of the deflecting surface ( 38 ) joins the peripheral surface ( 18 ) adjacent the cutting section ( 20 ) and distal the rear end ( 16 ) of the cutting head ( 10 ).