Machining by chip removal

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Even if chip removal machining operations are part of the oldest set of machining processes to ever exist, they have managed to stay at the core of mechanical technology, constantly reinventing themselves and staying relevant.


Machining by chip removal, also known as turning, is a machining process that consists of separating material from a piece by means of tools with very defined edges. With this type of process, parts such as screws and flanges can easily be produced, and even parts of household appliances, aeronautics, vehicles, etc.


The chip removal process is carried out by the penetration of a cutting tool into the material, making a relative movement between the part and the tool, resulting in the detachment of chips as the material is shaped.


It is a basic process for the mechanization of parts in the industry, which is why at Boyfre we guarantee the quality and precision of all our chip removal processes.


These processes can be classified as follows:


Basic chip removal machining processes


The turning processes are described below:


  • Sawing: consists of sliding a serrated blade forward and backwards to cut the material
  • Filing: the oldest turning technique, performed manually. It is used to finish the machined part with great precision and with very litl¡tle chip removal. It consists of repeatedly sliding a file to wear down imperfections.
  • Drilling: it is based on the execution of circular holes in the piece. To do this, it is fixed on a flat surface and with the help of a drilling machine, the material is penetrated vertically in a circular motion, generating continuous chip removal until the desired depth is achieved.
  • Tapping: this technique can be done manually, making a thread inside a hole using a tap. For external threads a tap is used.


Ultra definition chip removal machining processes


  • Turning: This procedure is used to create surfaces of revolution by chip removal. For this, the piece has a rotary movement and the tool, called a lathe, linear. Lathe machining can be manual or semi-automatic, or it can be done on CNC machining centers.
  • Milling: It consists of cutting the material with a rotary tool called a milling machine. It has movement capabilities in all 3 axes, so it is capable of  machining all kinds of different parts.
  • Broaching: Broaching consists of passing a rectilinear multi-edged tool, called a brush, over the surface to be carved into the piece, either outside or inside, to shape it a certain way.
  • Mortising: by means of the rectilinear and vertical reciprocating movement of the machine called a mortiser, also known as a vertical filing machine, chips are removed by moving the machine into pieces fixed on the table.


Using these techniques, accuracies in the order of microns can be achieved, while also providing excellent surface finishes.


Once the chip removal processes have been defined, it is important to also take into account the material used in the machining of parts, since this will affect the type of processes that will be used. By the definition that has been given, we see the importance of the machinability of the pieces, that is, the ease with which a metal can be machined. So:


What are the most used materials in chip removal?


Taking into account the machinability of the pieces, the materials most used with this manufacturing technique are metals, plastics and their compounds and ceramic compounds.


At Boyfre, we offer a wide variety of processes and finishing of parts in all kinds of materials for different sectors, offering tailored solutions for each client. You can consult our services by contacting us through our telephone: + 34 93 372 26 05 or by sending an email to