Hole saw with replaceable cutting tip

Abstract

A device for cutting a hole, such as in sheet metal is provided. The device includes an axially rotatably cylindrical body that is operable with a rotatable drive. A distal end portion of the body includes a replaceable cutting tip and a replaceable pilot. The cutting tip is secured within a notch in the body and extends distally from the distal end portion. A shank portion is also provided which is adapted for securement within a rotational drive mechanism, such as a hand held drill.

1 . A device for cutting a hole in sheet metal, the device comprising: 
 a rotatable cylindrical body defining a longitudinal axis, the body having a lead edge portion and an engagement end portion;    the lead edge portion defining an interior recess defining a frustoconical portion,    a notch for directing sheet metal debris away from the cylindrical body;    a pilot drill bit detachably secured within the interior recess along said axis and extending from the lead edge portion, said pilot drill bit adapted to align the cylindrical body;    a detachable cutting tip securable with the notch, a cutting edge of the cutting tip extending distally from said lead edge portion; and    a shank member integral with the body; the shank member extending axially from the engagement end of the body, the shank member adapted for engagement with a rotational drive.