초록 ▼

The present invention is a drilling system for cutting flat bottomed holes in work pieces. The tool has two opposing angled cutting edges extending from a rotational axis, with the inner portions of these cutting edges extending upwardly to create an overlapping web at the center. The overlapping we

The present invention is a drilling system for cutting flat bottomed holes in work pieces. The tool has two opposing angled cutting edges extending from a rotational axis, with the inner portions of these cutting edges extending upwardly to create an overlapping web at the center. The overlapping web strengthens the center portion of the cuttings edges of the tool. The angle at which the inner portion of the cutting edge is inclined can be increased to create a center point on the cutting surface of the tool. The center point adds stability to the tool as it rotates along its longitudinal axis. The cutting edge has a rake surface with a positive rake angle that lessens the forces on the insert and also allows for better formation of chips of stock material being removed. Chip breakers can be cut into the cutting edges of the insert, further aiding in the removal of stock material.

대표청구항 ▼

[ What is claimed is:] [1.] A drilling system comprising a tool having a longitudinal axis, a substantially cylindrical side surface, and a mounting end and a cutting end,said cutting end having at least first and second cutting edge, said first cutting edge extending radially from a position adjace

[ What is claimed is:] [1.] A drilling system comprising a tool having a longitudinal axis, a substantially cylindrical side surface, and a mounting end and a cutting end,said cutting end having at least first and second cutting edge, said first cutting edge extending radially from a position adjacent said longitudinal axis to a first outer end, and said second cutting surface extending radially from a position adjacent said longitudinal axis in a direction opposite said first cutting edge to a second outer end, and including a web extending between said at least first and second cutting edges through said longitudinal axis which connects between said first and second cutting edges, to form a continuous cutting surface, wherein said first and second cutting edges and said web provide said cutting surface.