Chucking reamer with replaceable cutter

Claim 1

A chucking reamer comprising: (a) a shank having an axis and a planar end face transverse to said axis, (1) said shank being formed with an axial bore extending inward of said end face and another bore obliquely inclined to said axis and communicating with said axial bore; (b) a cutter member having an annular rear face in contact with said end face and an annular front face, (1) said cutter member being formed with a bore extending between respective orifices in said front face and rear face, (2) said cutter member being formed with at least one axially extending, radially open flute; (3) the orifice of said bore in said front face being bounded by an annular face portion of said cutter member flaring in a direction outward of said bore; (c) a straight, elongated clamping stud, (1) a first longitudinal portion of said stud being conformingly received in the bore of said shank, (2) a second longitudinal portion of said stud being received in the bore of said cutter member with radial clearance; (d) an enlarged head fixedly attached to said second portion and having an annular face portion tapering inward of said bore in said cutter member, (1) one of said annular face portions being convexly arcuate in axial section and engaging the other annular face portion along a closed loop about said axis; (e) a setscrew threadedly received in said other bore of said shank, (1) said first portion of said shank having a face sloping obliquely toward said axis and toward said second portion, (2) said setscrew abuttingly engaging said sloping face and thereby holding said annular face of said head in abutting engagement with said cutter member in the orifice in said face.