Exciting prospects for your production


High performance down to the last nanometer – layer by layer

The right coating can increase performance and cost effectiveness:
H-O-T offers the full range of technologies. In addition to standardized applications, we will also work with you to develop a customized solution – tailored exactly to your own requirements.
Take advantage of our 30 years of expertise, impressive innovations and valuable expert knowledge about practical uses. We guarantee reproducible quality for every coating – as well as the entire H-O-T service package, of course.

Since 1988

H-O-T high-tech coatings have been in use. Globally – in all sectors of industry.

Areas of application

Automotive industry | Medical technology
Aerospace industry | Textile industry
Mechanical engineering | Tool and mold making
Consumer goods

PVD coatings

PVD (Physical Vapor Deposition) stands for the physical deposition of thin layers from the vapor phase. 

This process produces layers with a high proportion of covalent bonds of the layer atoms. Properties such as hardness and thermal and chemical stability are significantly enhanced by the PVD coating of precision tools and high-quality components. At the same time, properties such as the coefficient of friction and the tendencies to jam, clog, stick, corrode and oxidize are significantly reduced. Our high-tech coatings have been used in all sectors of industry since 1988.

PACVD coatings

PACVD (Plasma Assisted Chemical Vapor Deposition) is a development of the CVD process and combines the advantages of both the PVD and the CVD process. In the PACVD process, the coating is deposited by a chemical reaction from the gas phase at temperatures below 180°C with a specific plasma support.


Our coatings are the preferred coatings for machining, shaping and stamping processes, plastics technology and in all areas where tribological properties need improvement.

Area of application

Machining Industry


  • Significantly longer service life
  • No material build-up on the cutting edges
  • High temperatures displaced into the chips
  • Increased cutting parameters
  • Dry machining possible
  • High speed cutting possible


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Area of application



  • Low tendency to build-up
  • Significantly longer service life
  • No sticking and cold build-up
  • Optimization of the flow characteristics
  • Clean cuts and therefore less dressing needed for the work-piece
  • Reduced coefficient of friction and therefore reduction in the stamping and retraction forces


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Area of application



  • Excellent wear protection
  • Protection of structured tools and protection against damage to finishes
  • Improved demolding properties
  • Faster filling > shorter cycle time
  • Reduced cleaning through reduction of plate-out
  • Increased production reliability
  • Improved surface quality of the plastic parts
  • Reduced distortion of the plastic parts


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The new high-performance coating for the machining industry, shaping and stamping technology, and plastics technology.

For more efficient milling, stamping, cutting, …

NovaDur® Prime (AlCrN) can be used anywhere, and it optimizes manufacturing reliability in soft and medium-hardness materials.

  • Significantly longer service life thanks to excellent resistance to wear
  • Extreme temperature and oxidation resistance when wet or dry machining
  • Improved productivity and cost effectiveness due to faster cutting speeds


Areas of application

  • Machining industry: e.g. for machining steels ≤54 HRC
  • Shaping and stamping technology: e.g. for medium and high-alloyed materials


Areas of application
Tool making, machine and mold construction, machining of aluminum

  • Low coefficient of friction
  • Excellent wear protection
  • Extreme hardness
  • Excellent oxidation resistance
  • Brilliant look


TT®-DLC is a metal-free diamond-like layer of carbon and is deposited at low temperatures using the PACVD process. The combination of good wear-resistance and outstanding frictional and non-stick properties makes TT®-DLC coatings an ideal surface treatment for components and tools subject to high frictional forces.


TT®-C-DLC coatings are a sub-group of the amorphous, diamond-like carbon coatings (DLC – Diamond-Like Carbon). Unlike the majority of the commercially available TT®-DLC coatings, they are not deposited from gaseous hydrocarbons (e.g. acetylene or methane) using the plasma-activated CVD process (PACVD – Plasma Assisted Chemical Vapor Deposition).

TT®-C-DLC coatings can achieve both a higher hardness and a lower coefficient of friction than the TT®-DLC coatings deposited by the PACVD process. The properties of TT®-C-DLC coatings are summarized in the table.

TT®-C-DLC coatings are normally deposited with a thickness of 1.5 ± 0.5 μm. Because of their properties, these coatings are often used for standard components.


TT®-ta-C coatings are a sub-group of the amorphous, diamond-like carbon coatings (DLC – Diamond-Like Carbon).
TT®-ta-C is a tetahedral, amorphous, hydrogen-free carbon coating that is produced from solid carbon (graphite) by means of laser arc technology (PVD process).

Coating structure:Hydrogen-free, tetahedral, amorphous carbon, sp³ content adjustable above 85 %
Hardening:4500–7000 HV, adjustabl
E-modulus:300–450 GPa, adjustabl
Coefficient of friction:0.05–0.10 (dry on steel)
Wear coefficient:1*10-8 mm³/Nm (dry on steel)
Temp. resistance:400– 500°C in air, <800°C in vacuum
Coating thickness:bis 1,5 μm

Von H-O-T beschichteter Bohrer für Radschrauben-Bohrung in Alufelgen.


UniTwin® treatment is a combination of special plasma nitriding and subsequent hard coating (PVD and PACVD coatings)


Areas of use

  • Metal forming dies up to 500°C
  • Molds and transport elements for plastics
  • Die-casting tools


Material groups

  • Tool steels
  • Powder metallurgy materials
  • Special materials

The advantages

  • The supporting effect of the nitrided layer reduces the “eggshell effect” and reduces wear on the functional layer
  • Significant increase in the service life of tools and machines
  • Avoids abrasive and adhesive wear
  • Improves demolding characteristics
  • Very good coating adhesion


Reliable high quality over a long period:

hi-Fusion significantly improves the surface hardness – enabling you to win the struggle against wear. It also prevents the mold surface from being scratched, as well as the edges from becoming brittle and the plastics from sticking to the tool. Using hi-Fusion also saves you time and money in post-treatment.

Experience coating technology that is more advanced than ever.

Ensures brilliant results.

Reduces maintenance, repair and reject costs.

Increases productivity by approx. 60%.

hi-Fusion – The new quality class for durability and cost effectiveness

Plasma-supported diffusion coating for surfaces for plastic injection molds

hi-Fusion is a plasma-supported diffusion process for the targeted optimization of mold surfaces (in plastic injection molding) in series production.

hi-Fusion in practice
Hard facts to put you one step ahead ...

  • Improves scratch resistance
  • Increases wear resistance
  • Raises corrosion resistance
  • Improves polishing ability
  • Reduces maintenance costs
  • Extends service life
  • Ensures consistent quality

Production details

Suitable materials:1.2343 | 1.2344 | 1.2379 | 1.2311 | 1.2738 | 1.2083 (vergütet und angelassen > 420° C)
Surfaces:Polished and structured surfaces
Delivery condition: Metallically bright and disassembled
Coating systems:Combination with PVD and PACVD coatings possible
Machine size:ø 1.200 x 2.400 mm (other dimensions on request)
Individual weight:Max. 5 metric tons (other weights on request)

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