Hole saw with large carbide overhang
AssigneeMilwaukee Electric Tool Corporation
InventorsGeoffrey R. Piller, Austin J. Kazda, Christopher J. Rechlin
Life of this patent
Estimating the term…
Abstract
A hole saw with various teeth sets and/or sizes that overhang a sidewall is provided. In some embodiments, a large tooth overhangs an inner diameter of the sidewall to create a larger kerf than the sidewall's thickness. Similarly, a tooth set or variations in the circumferential directions of the teeth increase the kerf in a work-piece, either inward or outward. In various embodiments, one or both an enlarged tooth overhang and/or a set of the teeth increases the kerf of the hole saw relative to the sidewall thickness. This results in improved wear resistance, decreased heat on the teeth while cutting, and facilitates slug removal.
Claims21
A hole saw, comprising:
- a sidewall extending axially from a base to a cutting end of the sidewall opposite the base, the sidewall having a thickness extending between an inner sidewall diameter and an outer sidewall diameter;
- first cutting teeth arranged on the sidewall at the cutting end, the first cutting teeth having a width that is the same as the thickness of the sidewall;
- and
- overhang cutting teeth that are wider than the first cutting teeth, wherein the overhang cutting teeth extend radially inward from the sidewall to form an inner kerf diameter that is less than the inner sidewall diameter, and wherein the overhang cutting teeth have radially outer surfaces, and wherein an entire length of the radially outer surface of each of the overhang cutting teeth is flush with an outer surface of the sidewall;
- and
- an endcap coupled to the base of the sidewall.
A hole saw, comprising:
- a cylindrical body, comprising:
- a sidewall extending axially from a base to a cutting end of the sidewall opposite the base, the sidewall defining a thickness extending between an inner sidewall diameter and an outer sidewall diameter;
- first cutting teeth arranged on the sidewall at the cutting end, the first cutting teeth having a width that matches the thickness of the sidewall;
- and
- carbide cutting teeth at the cutting end, the carbide cutting teeth wider than the first cutting teeth and defining a kerf with an inner kerf diameter, wherein an entire radially outer surface of each of the carbide cutting teeth is flush with an outer surface of the sidewall, the carbide cutting teeth comprising:
- inner overhang cutting teeth, wherein the inner overhang cutting teeth of the carbide cutting teeth extend radially inward over the inner sidewall diameter;
- and
- inner set cutting teeth of the carbide cutting teeth defining an inward angle relative to the inner sidewall diameter, wherein the inner overhang cutting teeth and the inner set cutting teeth form the inner kerf diameter that is less than the inner sidewall diameter;
- and
- an endcap coupled to the base of the sidewall.
A hole saw, comprising:
- a cylindrical body, comprising:
- a sidewall extending axially from a base to a cutting end opposite the base, the sidewall defining a thickness extending between an inner sidewall diameter and an outer sidewall diameter;
- first cutting teeth with no set relative to the inner sidewall diameter arranged on the cutting end of the sidewall, the first cutting teeth having a width that is the same as the thickness of the sidewall;
- an inner set cutting tooth that defines an inner set with an inward angle relative to the inner sidewall diameter, wherein the inner set cutting tooth extends radially inward at the inward angle from the inner sidewall diameter, such that an inner kerf diameter that is less than the inner sidewall diameter;
- and
- an outward set cutting tooth that defines an outward set with an outward angle relative to the outer sidewall diameter, wherein the outward set cutting tooth extends radially outward from the outer sidewall diameter at the outward angle, such that an outer kerf diameter is greater than the outer sidewall diameter;
- an overhang cutting tooth wider than the first cutting teeth and wider than the thickness of the sidewall, the overhang cutting tooth having a radially outer surface, wherein the whole radially outer surface is flush with an outer surface of the sidewall;
- and
- an endcap coupled to the base of the sidewall.
Dependencies are inferred from the claim text.