公开(公告)号：US11278970B2

公开(公告)日：2022-03-22

申请号：US16594622

申请日：2019-10-07

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Alexander R. Greenhill ,  Brett A. Parendo ,  David Hlavac ,  WeiJie Wu ,  Gang Huang

IPC: B23B51/02

Abstract: A drill bit includes a body having a first end, a second end, and an axis of rotation extending centrally through the body from the first end to the second end. The drill bit also includes a shank adjacent the second end. The drill bit further includes a cutting head adjacent the first end. The cutting head includes a pilot tip and a cutting portion. The cutting portion has first tip surfaces and second tip surfaces on opposite sides of the pilot tip. Each first tip surface extends radially outward from the pilot tip to a corresponding second tip surface. The first tip surfaces define a first tip angle through the axis of rotation that is less than 180 degrees. The second tip surfaces define a second tip angle through the axis of rotation that is smaller than the first tip angle.