Explanation Of Thread Rolling Processes

Explanation Of Thread Rolling Processes

Thread rolling is a specific type of metal rolling processes that are used slightly different purpose. Here we explain the thread rolling process, products, and process parameters. 

Thread rolling process(Image Source:www.profimach.com/nl/vormrol-draadrol-machine).

What Is The Thread Rolling Process?

Thread rolling is a process that thread geometries as obtained by rolling the cylindrical parts between the sets of rollers. Threaded parts are very important in mechanics such as bolts and screws. With thread rolling, serial and mass production of these machinery parts is possible. 

The thread rolling process is applied at room temperatures generally. Because of this fact, the thread rolling process can be classified as a cold working process.

The geometry of the thread die surface, which came in contact with the starting blank, defines the thread geometry of the finished part. 

Two types of dies are used in thread rolling processes generally. The first type is the flat dies which are doing reciprocating motion according to each other to form threaded forms. Round dies are the second type that threaded geometries are obtained with the rotation of these dies. 

Thread cutting is another alternative to the thread rolling process, in which the machining operations are applied. There are very important advantages of the thread rolling process over the thread cutting process; 

  • Stronger thread structures are obtained because of the work hardening of the work part between dies. 
  • Better surface characteristics can be achieved with the thread rolling process.
  • Material use in thread rolling is more efficient. 
  • Because of the action of compression forces applied to the work part, the fatigue resistance of the produced part increased. 


The general characteristics of the thread rolling process can be summarized like this. 

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