Solid carbide machine tap

Solid carbide machine tap

Solid carbide taps have become increasingly popular and important in recent years. The reason for this is that more and more machines are used in production. The threading tools must therefore be more durable and wear-resistant.

Detailansicht: drei vollhartmetall Maschinengewindebohrer (VHM) mit unterschiedlichen Nuten zum Gewindeschneiden

What are solid carbide machine taps

Solid carbide machine taps (solid carbide) are used when machining hard materials (up to HRC 63), as solid carbide tools have a very high hardness and wear resistance, resulting in a long tool life even in the most difficult working environments.

Solid carbide machine taps are suitable for both through holes and blind holes.

What is solid carbide?

Solid carbide (VHM) is a composite material. It consists of sintered, ultra-fine carbide tungsten carbides. Usually tungsten carbides are used as metallic hard material and cobalt as binder. Grain size of the metallic hard materials and the type of binder determine the properties of the material.
Type K 44 UF is used for machine taps.
K stands for the assignment to the material group, UF stands for grain size (ultra fine) and 40 is a code number for the wear resistance of the material type.

Solid carbide has the following physical properties:

  • density [g/cm³] : 14,05 ± 0,15
  • Hardness HRA: 92,5
  • Hardness HV 30: 1680
  • Flexural strength [N/mm²]: >4000
  • Grain size [μ]: Ultrafine ~0.4 – 0.6

Are there differences between solid metal tools and carbide?

The decisive difference between solid metal tools and carbide is that with a solid carbide machine tap the complete tool is made of solid carbide.

With carbide taps, the tool body and cutting edges have different materials.

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