Die UNC 7/8-9 2A HSS DIN 22568 Cztool

Technical data of UNC 7/8-9 thread cutter

- notched thread d1 - 7/8-9,

- thread pitch - 9 turns per inch,

- external diameter d2 - 55 mm,

- thickness h1 - 22 mm,

- number of chip holes - 4,

- required diameter of the shaft - 22 mm.

7/8-9 UNC inch unified tooling

American7/8-9 UNC unified threading machine for cutting external threads. Circular machine tool is a multi-cutting tool for cutting external threads. It is a uniform threading machine, which means that it makes a thread in one pass, after less than 2 turns, or more precisely 1.75 P, a full thread in 2A tolerance is already made. The principle of the tool is to screw it on (like a nut on a bolt), during which the blades of the tool cut the thread. The tool is made of high-quality SW7M high-speed steel from the HSS family. It is possible to use the dies both in manual and machine processing. An important issue when making threads by hand is the use of toolholders for the dies, thanks to which the proper execution of the thread is ensured and damage to the dies can be avoided. Structure of the dies. The 7/8-9 UNC dies have chip holes that are designed to drain the cut material, depending on the size of the dies, there can be usually from 3-6 holes. In the working part of the burnisher, there are cutting parts (exist on both parts of the working part) and a guiding part located in the center of the working part.