Tap
AssigneeNachi-Fujikoshi Corp.
InventorsShunsuke Takami, Yuki Kurita
Life of this patent
Estimating the term…
Abstract
A tap 1 has a threaded portion 2 including a cutting blade 5 on an outer circumferential surface, a flute portion 3 that divides the threaded portion 2 in a circumferential direction, and a shank portion 4 formed continuously from the threaded portion 2 and the flute portion 3 along a central axis O. The flute portion 3 includes, in a cross-sectional view, a first flute 31 formed continuously from the cutting blade 5 of the threaded portion 2, a second flute 32 formed continuously from the first flute 31, and a ridge line portion 33 being a boundary between the first and second flutes 31, 32. A distance “e” from the central axis O to the ridge line portion 33 is longer than a distance d1 and a distance d2, respectively.
Claims7
A tap comprising:
- a threaded portion that has a cutting blade on an outer circumferential surface of the threaded portion;
- a flute portion that is formed so as to divide the threaded portion in a circumferential direction;
- and
- a shank portion that is formed continuously from the threaded portion and the flute portion along a central axis,
- wherein the flute portion includes, in a cross-sectional view,
- a first flute that is formed continuously from the cutting blade of the threaded portion,
- a second flute that is formed continuously from the first flute, and
- a ridge line portion that is a boundary between the first flute and the second flute, and
- a distance from the central axis to the ridge line portion is longer than a distance from the central axis to a flute bottom of the first flute and is longer than a distance from the central axis to a flute bottom of the second flute,
- the distance from the central axis to the flute bottom of the first flute is shorter than the distance from the central axis to the flute bottom of the second flute.
Dependencies are inferred from the claim text.