Rotary cutting tool

Claim 1

A rotary cutting tool, comprising: a holder which is elongated and generally cylindrical and to which can be attached a cutting insert, said holder having a longitudinal axis, and in axial cross section having a vertical axis perpendicular to a horizontal axis, one end of said holder having a recessed area including a first surface formed by the removal of a segment of said holder generally defined in axial cross section by an arc and chord of said holder; a first recess extending in an axial direction and into said holder from the periphery thereof, when viewing said holder in axial cross section said first recess being located at a first radius of said holder which is coincident with said vertical axis; a second recess extending in an axial direction and into said holder from the periphery thereof, when viewing said holder in axial cross section said second recess being located at a second radius of said holder which forms a first angle with said first radius; a first threaded aperture extending into said holder from said first surface along a first axis which is spaced from and parallel to said horizontal axis; a second threaded aperture extending into said holder from said first surface along a second axis which is spaced in an axial direction from said first axis and spaced from and parallel to said horizontal axis and said first axis; a third threaded aperture extending into said holder along a third axis which is parallel to said first and second axis; a third recess extending into said holder from the periphery thereof along a fourth axis which forms a second angle with said vertical axis and which is spaced about 180° C. from said first radius; a first guide pad positioned within said first recess and having a first guide surface extending therefrom, said first guide pad having a first vertical axis which is coincident with said first radius; a second guide pad positioned within second recess and having a second guide surface extending therefrom, said second guide pad having a second vertical axis which is coincident with said second radius; a first adjusting screw threaded into said first threaded aperture and having a first camming surface for engaging a corresponding camming surface of said cutting insert; a second adjusting screw threaded into said second threaded aperture and having a second camming surface for engaging said corresponding camming surface of said cutting insert; a clamping screw threaded into said third threaded aperture; and, means attached to said elongated holder by said clamping screw for holding said cutting insert within said third recess such that a cutting edge of said cutting insert will extend along a fifth axis which is (a) parallel to said longitudinal axis and (b) spaced about 180° C. from said first radius.