Long machine tap DIN 357 HSS

The Koronet long machine tap, made in accordance with DIN 357, is designed for the production of ISO metric internal threads in workshop and production conditions. The tool is designed for stable, repeatable machine operation, where process control and even cutting load are important.

DIN 357 standard – extended cut and lower cutting resistance

Compliance with DIN 357 means the use of an elongated cut that ensures:

• smoother entry of the tool into the material,

• gradual increase in cutting load,

• reduction of cutting resistance,

• more stable threading process.

This geometry promotes precise thread formation and reduces the risk of tool overloads, especially during machine work.

DIN 357 standard – extended cut and lower cutting resistance

Compliance with DIN 357 means the use of an elongated cut that ensures:

• smoother entry of the tool into the material,

• gradual increase in cutting load,

• reduction of cutting resistance,

• more stable threading process.

This geometry promotes precise thread formation and reduces the risk of tool overloads, especially during machine work.

Working geometry – controlled and stable cutting

The working part of the tap is equipped with straight grooves, allowing you to:

• stable guidance of the tool in the hole axis,

• controlled threading process,

• Achieve a clean and accurate thread profile.

This solution works well in a wide range of standard machine threading operations.

Machine Construction

The tap is adapted to work in CNC machine tools and conventional machines. The compact, axial design enables secure clamping in machine holders and ensures high process repeatability.

Application

The DIN 357 HSS machine tap from Koronet is used in the processing of:

• structural steels,

• low-alloy and alloy steels,

• medium-strength materials.

The tool is designed for applications where precision, stability and reduction of cutting resistance during threading are important.