Precision cemented carbide threading tap
AssigneesKennametal Inc., Yamawa Mfg. Co., Ltd.
InventorsWillard E. Henderer, Sadayuki Akaki
Life of this patent
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Abstract
A precision cemented carbide threading tap is designed for use in precision tool holders in synchronous high speed tapping. The precision tap includes a fully cylindrical shank without the aid of squares, flats or other notches. The precision tap further includes a threaded body portion and a threaded cutting chamfer portion. The threaded body portion and the threaded cutting chamfer portion of the precision tap are concentric to the cylindrical shank of the tap within a runout of 10 microns. The precision cemented carbide threading tap improves the accuracy, life and speed by which internal screw threads are produced.
Claims12
A precision cemented carbide tap, comprising:
- an axially rearward end including a cylindrical shank;
- and
- an axially forward end including a threaded body portion and a threaded cutting chamfer portion,
- wherein the threaded body portion, and the threaded cutting chamfer portion are concentric to the cylindrical shank within a runout of 10 microns.
A precision cemented carbide threading tap including an axially forward end including a threaded body portion and a threaded cutting chamfer portion, and an axially rearward end including a cylindrical shank without squares, flats or other notches.
Dependencies are inferred from the claim text.