Threading is the process of making screw threads. More screw threads are produced annually than any other machine element. There are many methods for producing yarn, including subtractive methods (many types of cutting and milling the yarn, as described below), deformative or transformative methods (rolling and shaping, printing and casting), then additive methods (such as 3D printing) or with the combination. (Source:

Subtractive method

Yarn cutting, as opposed to forming and winding the yarn, is used when the full thread depth is required, when the quantity is small, when blanks are not very accurate, when threading to shoulders is required, when fixing tapered threads, or when the material is brittle.

The most common subtractive threading method is tap and die cutting. Unlike drill bits, hand taps do not automatically remove the chips they make.

Deformative or transformative methods

Thread forming and thread winding are processes of forming, not cutting, screw threads, with the former referring to the manufacture of internal threads and external threads. In both these processes, the thread is formed into blanks by pressing a shaped tool, usually called a ‘thread rolling die’ on the blank, in a process similar to knurling.


This process is used for large production runs because the typical production rate is around one piece per second. Forming and winding does not result in fewer cuts and materials because the size of the blank starts to be smaller than the blank required for cutting the thread; there is usually a 15 to 20% material savings on the vacant lot, by weight.


Additive method

Broadly speaking, threaded parts must be potential to be generated through additive manufacturing (3D printing), of which there are many variants, including fused deposition models, selective laser sintering, direct metal laser sintering, selective laser melting, electron beam melting, multi-layered manufacturing. objects, and stereolithography.

For most additive technologies, it has not been that long since they emerged from the end of the laboratory in their historical development, but further commercialization is accelerating. Until recently, most additive methods tended to produce materials that were rough surface finish and tended to be limited in the properties of the material they could produce, and thus their initial commercial triumph was on the part of acceptable limitations.

The following is a checklist inspection form for threading which you should use properly.

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About the Author: Andres Ina Rivai

Good work is always to follow good and precise procedures. Don't forget that safety and health at work are always the top priority

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