Thread cutting tap and a method of its manufacture

Details Thread cutting tap and a method of its manufacture Thread cutting tap and a method of its manufacture

2002-04-29

2009-06-30

Bryant, David P (Department: 3726)

Cutting by use of rotating axially moving tool

Tool or tool with support

With pitch-stabilizing ridge

C408S230000, C470S198000

Reexamination Certificate

active

07553114

ABSTRACT:
A thread cutting tap having a threaded portion for cutting out a thread in a wall of a workpiece opening into which the threaded portion is to be introduced. The threaded portion is provided with at least two cutting edges extending in a circumferential direction of the body. Each cutting edge is an integral peripheral part of a flank portion extending substantially radially from the body. The flank portions define between one another a chip removal flute extending in the longitudinal extension of the body for removal of chips. At least one of the flank portions has a side wall divided into a pair of elongated concave surfaces separated by an elongated ridge constituting a chip-breaking member. The chip removal flutes are at least partly helically shaped.

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