Hole-saw with brazed or welded endcap

#The present invention generally relates to the field of tools. The present invention relates specifically to a hole-saw with an endcap. In general, a hole-saw includes a cylindrical structure with cutting teeth at one end of the cylinder and an endcap at an end opposite the cutting teeth. In use, the endcap is coupled to a sidewall to spin the hole-saw at a high rate of speed, cutting a hole in a workpiece that has a size and shape that generally matches the size and shape of the cylindrical sidewall structure.

#One embodiment of the disclosure relates to a hole-saw, including a cylindrical sidewall forming a hole-saw body when coupled to an endcap. The hole-saw includes a cutting edge at a first end of the sidewall and a second end coupled to the endcap. The endcap includes a plurality of radially extending projections. The sidewall includes a plurality cut-outs, slots, and/or notches to receive the projections on the endcap. When the projections couple to the notches of the sidewall, a cylindrical hole-saw is formed. The sidewall couples to the endcap to form a cylinder. The cylindrical sidewall includes an outer surface and an inner surface defining a hollow internal area or interior. Each sidewall notch couples with a projection of the endcap to form a brazed or welded joint between the projection of the endcap and the notch.

#According to an aspect, embodiments of the disclosure relate to a hole-saw with an endcap and a cylindrical sidewall. The endcap has a plurality of radially extending central projections. The cylindrical sidewall forms the hole-saw body when coupled to the endcap. The sidewall has a cutting edge at a first end of the sidewall, a second end coupled to the endcap, and a plurality of notches located at the second end of the sidewall. The central projections on the endcap are received within the notches of the sidewall and couple the endcap to the sidewall.

#FIG. 1 is a perspective view of a hole-saw and arbor, according to an exemplary embodiment.

#FIG. 2 is a perspective view of a hole-saw, including a sidewall and an endcap, according to an exemplary embodiment.

#FIG. 3 is a plan view of the hole-saw of FIG. 2 showing an endcap, according to an exemplary embodiment.

#Referring generally to the figures, various embodiments of a cutter or hole-saw, including an endcap coupled to the sidewalls, are shown. In general, a hole-saw includes a cylindrical sidewall, a cutting end with cutting teeth at one end of the cylindrical sidewall, and an endcap at the other end of the cylindrical sidewall. As will be generally understood, the endcap includes a mounting structure that mounts to a driving device (e.g., a power tool). As the power tool rotates, an arbor couples a rotational tool to the endcap to drive the hole-saw in rotation and cut a hole in a workpiece. The endcap provides support and rigidity to the sidewall.

#As discussed herein, the sidewall of the hole-saw discussed herein includes notches positioned to receive central projections extending from the endcap to couple to the sidewall. In various embodiments, the endcap discussed herein is assembled with central projections constructed to fit within notches of the cylindrical sidewall. This projection and notch assembly of the endcap and cylindrical sidewall ensures a perpendicular (or orthogonal) joint. In addition, the projections may be bent and/or brazed or welded to provide a reliable orthogonal brazed or welded joint with the sidewall.

#For example, once the endcap is joined to the sidewall, a brazing or spot welding process on the overlaid brazed or welded joint ensures a right angle is formed between the cylindrical sidewall and the endcap. The inner surfaces of the sidewall and lateral projections also provide brazing or spot welding locations. Applicant has found that the notch and projection endcap assembly discussed herein allows for easier assembly and allows for endcap components that require less precise tolerances than conventional endcap assemblies.