Patent ID: 7077606
Filing Date: 2006-07-18
Classification: B23B,B23C,Y10T

Abstract:
1. A drilling and chamfering arrangement for drilling and chamfering a countersunk hole in a workpiece, said arrangement comprising: a drill body; at least one cutting insert having a trapezoid shape and being configured and disposed to cut a countersunk hole; said at least one cutting insert comprising a first cutting insert comprising: a chamfering collar being disposed around said drill body and being removably attached to said drill body; said chamfering collar comprising at least one seat being configured to seat a cutting insert; said at least one seat comprising a first seat being configured and disposed to seat said first cutting insert; said first cutting insert being removably attached to said chamfering collar at said first seat; said first seat having an interior edge being disposed immediately adjacent said drill body and being disposed to run parallel to said back side section of said first cutting insert; said first seat comprising a guide projection being disposed to project along a portion of said interior edge of said first seat; and said guide projection being matingly engaged with said guide recess of said first cutting insert to provide a friction fit between said first cutting insert and said first seat, and also being configured and disposed to prevent contact between said drill body and said first cutting insert.