PCD tools
We manufacture PCD tools according to your requirements and will be happy to advise you at any time. Tools with very hard surfaces and long tool life are playing an increasingly important role in machining technology. Only with them it is possible to work cost-saving, precise and with a large number of different materials. At Lehmann Präzisionswerkzeuge GmbH you will therefore find a large selection with PCD tools for every need.
- long-term and cooperative partnership
- tools optimized for your needs
Experience
since 1991
Employees
more than 110
Made in Germany
100%
Certification
according to DIN EN ISO 9001
The advantages of our PCD tools at a glance
PCD tools are characterized by a number of advantages, thanks to which they are suitable for many different fields of application. Here is a brief overview. First of all, there is their hardness, thanks to which it is possible to machine a wide range of materials. The high abrasion resistance and the associated wear resistance also score points. Tool life is significantly longer than with HSS and carbide tools. This significantly reduces the time needed for tool changes. In addition, there are other advantages related to the high stability:
Due to these properties, PCD tools make it possible to achieve cutting speeds of 2,500 - 6,000 m/min with manufacturing tolerances of less than H7. In addition, a surface roughness of 2.0 to 0.7 micrometers is possible thanks to the high surface quality.
- high process reliability, as fewer radius corrections are required for circular milling up to the end of tool life compared to solid carbide tools
- significantly longer tool life than HSS and carbide tools -> reduced tool change data
- reduced machining times due to high cutting values
- low inspection effort due to high dimensional stability
- PCD tools can be designed in such a way that they combine several machining steps
- very good price-performance ratio
Due to these properties, PCD tools make it possible to achieve cutting speeds of 2,500 - 6,000 m/min with manufacturing tolerances of less than H7. In addition, a surface roughness of 2.0 to 0.7 micrometers is possible thanks to the high surface quality.
PCD milling tools
PCD milling tools, made of Polycrystalline Diamond, are characterized by their high wear resistance and excellent cutting speed. Their ability to be used in demanding milling tasks leads to efficient production and high-quality results.
PCD drilling tools
PCD drilling tools are highly valued in industry for their durability and ability to cut through even the hardest materials. They are made of polycrystalline diamond (PCD), an extremely hard and wear-resistant material that makes them ideal for demanding drilling tasks.
PCD reaming tools
PCD reaming tools, also known as polycrystalline diamond reaming tools, offer excellent resistance to wear and enable precise machining of materials. Their high thermal stability and exceptional hardness make them ideal for demanding industrial applications, improving both the efficiency and quality of manufacturing processes.
PCD combination tools
The PCD combination tools are ideal for complex machining of hard materials due to their high abrasion resistance and durability. They are available in different versions and can be used for various applications, such as drilling or milling, as required.
We are here for you
If you have any questions about these or other topics, our friendly staff will be happy to help you at any time.
Benefit from the many advantages offered by Lehmann Präzisionswerkzeuge GmbH.
Benefit from the many advantages offered by Lehmann Präzisionswerkzeuge GmbH.
Your expert for PCD tools
PCD stands for polycrystalline diamond. This is a synthetically produced mass of diamond particles that are bound into a metal matrix. The material is characterized by its hardness and very high resistance, which is why it is very well suited for the production of cutting tools. PCD tools are manufactured by a two-stage sintering process:
1. high pressure high temperature synthesis
- A metal-graphite mixture is subjected to great pressure and high temperatures.
- Once the melting temperature is reached, the metal covers the graphite particles with a thin film. The graphite then dissolves to the saturation point.
- Increasing pressure and temperature reduces the solubility of the carbon.
- It is important in this process that the diamond does not graphitize again. Therefore, the temperature is lowered while maintaining the pressure.
- The cycle is repeated several times. This results in larger monocrystalline diamonds.
2. high pressure liquid phase sintering
- A diamond layer is applied to a cobalt-containing carbide base body.
- Predefined diamond grit sizes with 2 - 100 micrometers are used for the production of cutting materials.
- Monocrystalline diamonds are bonded to form a polycrystalline matrix. Various sintering aids such as solvent catalysts are used in the process.
- The high pressure shapes and compresses the diamond body.
- The liquid cobalt penetrates the remaining cavities and dissolves the remaining graphite.
- Once the saturation limit is reached, the graphite is again precipitated as a diamond crystal. This creates a bond between the diamonds.
- The sintering process is not complete until there is no more graphite.
The most important areas of application for PCD tools
Due to its hardness and long service life, PCD is used in many different areas, in aerospace, automotive manufacturing and the pneumatic-hydraulic industry. One of the most important applications is the production of cutting materials for cutting tools:
- Tool systems for grooving and copy turning.
- end mills
- Threading inserts
- twist drills
- Step drills
- Cutting inserts with chip grooves
Note: For all their versatility, the use of PCD tools also comes with limitations. Steel cannot be machined economically with them. This is due to the high affinity of iron to carbon. The carbon contained in the diamond diffuses with the steel as the temperature increases. This limits the tool life.
You can find these PCD tools at Lehmann Präzisionswerkzeuge GmbH
- PCD tools with axial and radial run-out adjustments
- Monoblock tools with steel base body for direct adaptation to the machine spindle from HSK to steep taper for high runout characteristics
- Bell tools for the production of concentric outer contours via countersinking and circular milling options
- PCD tools for drilling, reaming and milling in single-stage and multi-stage versions
- PCD tools with complex cutting edge geometries for the production of difficult part contours
- Tools with steel and solid carbide basic bodies in all common cylindrical shank variations
Challenges in the use of PCD tools / Notes on use
High temperatures are generated when working with PCD tools. Therefore, reliable cooling is required. CO2 flakes or gas are usually used for this purpose. Another challenge in the maintenance of PCD tools is sharpening. Due to the high inherent hardness, it can only be done by spark erosion or grinding with diamond grinding wheels.
Materials that can be machined with PCD tools
The materials that can be machined with PCD tools are very versatile. The areas in which cutting tools made of PCD are used are correspondingly extensive. Enclosed are the most important materials that can be machined with them:
- chipboard, fiberboard, plywood
- fiber-reinforced plastics
- composite materials
- aluminum alloys
- glass fiber
- plastics, rubber
- non-sintered and sintered ceramics
- mineral and thermoplastic materials in building renovation
- copper, brass, bronze
Your advantages when you order PCD tools from Lehmann
- many years of experience in the design and manufacture of PCD tools
- improvement of the machining process in terms of machining quality and machining time by technical consultant directly on site
- very good price-performance ratio
- short delivery times
- individual solution proposals for all application areas
- competent advice by application engineers
- regrinding and retooling of PCD cutters through reliable PCD service
Send request:
PCD tools
Just send us a short message and we will be happy to answer your open questions by phone or mail.
