Hole Saw and Method

摘要

A breakage resistant hole saw that reduces damage of the pilot hole drill bit caused by the sudden contact of the cutting teeth on the hole saw's cutting body against the hard working surface after the drill bit has penetrated through the working surface. The hole saw disclosed herein includes a cylindrical cutting body mounted on an arbor. Formed on the circular lower edge of the cutting body is a plurality of angled teeth that cut through a working surface when rotated in one direction. Mounted on the end of the arbor is a pilot hole drill bit with a spiral cutting flute configured at a spiral cutting angle to penetrate the working surface when rotated in a direction opposite the cutting direction of the cutting teeth on the cutting body. Also disclosed herein is a method for forming a hole using a hole saw that reduces damage to the pilot hole drill bit.

主权项

1. An improved hole saw, comprising:
a. an arbor; b. a cylindrical cutting body mounted on said arbor, said cutting body includes a circular lower edge of the cutting body with a plurality of angled teeth configured to cut through thin metal when rotated in one direction; and, c. a pilot hole drill bit mounted on the distal end of said arbor, said pilot hole drill bit includes a spiral cutting flute configured at a spiral angle to penetrate a metal surface when rotated in a direction opposite the cutting direction of said cutting body.