Holesaw and pilot bit with threaded tip

The holesaw assembly of claim 17, wherein the radial faces taper radially inwardly to cut out regions in an axially rearward direction from the threaded tip.

A holesaw assembly comprising:

• a holesaw comprising a hollow cup defining a center axis, the cup having a round base perpendicular to the center axis, a peripheral wall coupled to and extending axially forward of the base to a peripheral edge at a free end of the wall, and one or more hard metal cutting inserts coupled to the peripheral edge, each cutting insert including a straight cutting edge and a rake face, the rake face disposed at a hook angle relative to a line parallel to the center axis, the hook angle being between approximately −5° and approximately +5°;
• and
• a spade bit received in the holesaw along the center axis, the spade bit having a shaft received in the base, a cutting head with a plate-like body coupled to a front end of the shaft, and an at least partially threaded tip coupled to a front end of the body, the body including first and second side faces extending radially outward from center axis, first and second cutting edges extending radially outward from center axis, and radial faces connecting radially outward edges of the first and second side faces, each of the radial faces tapering radially inwardly in a circumferential direction from the cutting edge to a trailing edge.