PKD Werkzeuge


Product highlights from the PCD/PCBN sector


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PKD Werkzeuge

Multi-fluted fine boring tool

Cylinder head machining
PKD Bohrer

PCD countersinks

Modern composite materials

PKD-Werkzeug Tube Design

Tube Design PCD tool

Low-chip machining

Schneidplatten PKD & PCBN




 Cleanliness-process reliability-wear protection

The SMART CAP PCD milling cutter from Gühring ensures highest productivity and energy efficiency in aluminium processing thanks to its extraordinary technical details. The additive-manufactured Smart Cap solution enables defined chip evacuation, optimised coolant supply and wear protection for the base body.

A barrier-free design enables three-dimensional cooling ducts for the PCD tools. This ensures optimised temperature control of the PCD cutting edges and reliable chip removal even during MQL machining. The use of brazed PCD cutting edges combined with the Smart Cap solution also enables simple handling for the user. The Smart Cap PCD face milling cutter is available from diameter 32mm to diameter 80mm, using 8 to 16 PCD cutting edges for maximum productivity.


Gühring KG


Additive-manufactured PF3000G with Smart Cap


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SMART CAP PCD face milling cutter

Cleanliness – process reliability – wear protection

Fine boring tools for the automotive industry


Valve seat and valve guide machining is the most cost-intensive machining task on the cylinder head. The valves control the load cycle by opening and closing the air inlet and exhaust outlet ducts. For optimum sealing of the valve disc to the valve seat ring, tight shape and position tolerances must be adhered to. Abrasive material also causes a high wear factor. The tool costs are therefore generally very high, during main times as well as downtimes.


Smart Setting System GP 300 with separate indexable insert clamp features integrated fine adjustment for μm-accurate and quick configuration of the precision-ground PCBN cutting edges. Due to the separate tensioning of the indexable insert and clamping holder, there is no need to repeat clamping holder configuration when changing an insert. The 6-fluted machining in the valve guide means that higher machining parameters can be achieved and tight tolerances are maintained at the same time. With the triangular T-insert, only one cutting edge is used for valve ring machining, the remaining cutting edges are protected inside the tool.


Gühring KG


Reduced set-up effort for valve guide and valve seat machining

PCD countersinks

 Machining of modern composite materials

They are lightweight, exceptionally strong and can be adapted to a wide range of applications: Modern fibre-reinforced plastics (FRP) are popular in industry. Particularly high standards of quality must be met when these materials are machined on the edges of components. Fibre protrusion, delamination, chipping and thermal damage often occur in these areas. Typical quality problems like these can be avoided by creating the ideal balance between tool geometries, cutting material, process parameters, cooling and clamping of the components. With the right tool, precise and clean component edges can be created even with riveted countersinks.


The countersink consists of a steel body, equipped with either two or three PCD cutters. This cutting material has cutting edges that remain sharp for a long time and can be reground when they reach the end of their service life – a particularly economical solution. When using the countersink, pre-drilled holes are used as pilot holes. Both fixed and interchangeable guide pins are available. The tool is especially suitable for manual drilling jobs. The customer uses a cage to adjust the countersinking depth. However, versions are also available for drill feed units or CNC machines.


Gühring KG


Machining of modern composite materials


Gühring KG


Machining of modern materials


 Modern composite materials

Modern fiber-reinforced plastics (FRP) are currently finding their way into a wide range of industrial applications for reasons of efficiency, weight, strength or dynamics. When machining these materials, great importance is attached to the quality of the component edges. Typical quality problems here are fibre overhangs, delamination, splintering and thermal damage. To avoid these problems, tool geometries, cutting material, process parameters, cooling and clamping of the components must be coordinated. Even with fibre composite combinations that are difficult to machine, fibre-free edges can be produced with the compression milling cutter.


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Intake manifold
Cylinder head

PCD tools in Tube design

Intake manifold machining – Exhaust gas recirculation valve

Fresh air from the air filter and recirculated exhaust air from the intake valves enter the combustion chamber through the intake manifold. An exhaust gas recirculation valve controls how much exhaust gas is returned to the combustion process. This reduces the vehicle’s emissions. Machining the connection bore in the exhaust gas recirculation valve is particularly challenging. This is a through-hole with several diameters and also a heavily interrupted cut.


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Cylinder head machining – Sealing hole

The sealing hole or water plug hole connects the cooling water circuit in the cylinder head. A sealing plug is then pressed into this bore or a further component is excluded from the circuit.


Objective: Chip-free machining

Both machining operations entail the risk that chips could get into cavities in the components. Removing these chips increases processing time and costs. If chips remain in the component after cleaning, this also has fatal consequences: The chips could impede the combustion process or even cause mechanical damage. The aim was to develop a tool adapted to these machining operations, ensuring safe chip removal from the machining zone.

PCD tools for low-chipping

Two different production variants are used for the tools in tube design:

Variant 1: The tubular tool head is produced using additive manufacturing methods and then screwed onto an HSK alignment adapter. This creates a modular, replaceable tool.

Variant 2: In the monobloc variant, the tubular tool head is also produced using additive manufacturing methods and permanently connected to the conventional base body.

However, both variants have the same characteristics. Therefore, the segment base and the internal three-dimensional coolant guides are produced using 3D printing. Backward-facing cooling channels support the defined chip removal. The chips emerge through two lateral openings at a sufficient distance from the component.

The decision on which variant to use in which case depends on various factors. This includes, for example, the length-diameter ratio in the machining job. The tool with the completely additively manufactured tool head is particularly suitable for machining smaller diameters. The second variant is used for machining larger hole diameters and long protruding tools.

Read more about the application of tube design here.

Two tool options in tube design


Gühring KG


 Tube design tool produced using additive manufacturing methods

Number of cutting edges
PCD tool Tube Design

PCD & PCBN cutting inserts

For the highest standards of surface finish qualities, cutting parameters and tool life

Tools with replaceable inserts with PCD and PCBN cutting edges exhibit exceptional quality and wear resistance. That’s why they are used for drilling, reaming, milling and turning with the best surface finish qualities and tolerances. The high wear resistance of the PCD/PCBN indexable inserts leads to a long service life and enables efficient cutting parameters, even with difficult-to-cut materials.

PCD inserts for machining aluminium alloys & non-ferrous materials

The main area of application for our high-quality PCD inserts are machining aluminium alloys and other non-ferrous materials. The inserts are manufactured in corner-tipped and edge-tipped versions in line with ISO standards. In addition, due to the wide variety of possible variants, we also offer special versions according to customer requirements or for special applications.

PCBN inserts for machining a wide range of materials

Our PCBN inserts meet the ISO standard and are available in a wide range of tooling variants. By adapting the PCBN grades and geometric designs to the task in question, the inserts are suitable for machining different materials – from hardened steel to cast materials. Special versions with restricted tolerances are also possible, which ensure greater repeat accuracy. This reduces the effort required for calibrating the tools and avoids downtimes and reworking costs in production.

We offer solid PCBN inserts in a wide range of geometries for machining cast iron. In addition to a smooth design, a variant with a laser-cut clamping recess is also available on request.

Gühring KG


High repeatability thanks to precise grinding

PCD/PCBN division in numbers


The PCD and PCBN division has been one of the core competences of the Swabian tool manufacturer for over 40 years.


Our service extends far beyond the production of our tools. We will offer you support for the entire service life of your tools, if you wish. Extensive services and after sales support such as tool management and reprocessing of the tools.


95% of PCD/PCBN tools are designed as special tools in close cooperation with our customers.


We are nearby, everywhere all over the world. On all continents, in almost 50 countries and in over 70 locations.

Downloads / Links

PCD-PCBN Automotive
Modern materials
PCD/PCBN and ISO indexable inserts
PCBN ball track milling cutter

HOLLFELDER HPC milling cutter
Hollfelder Smart Setting Motion Tools

Explanation Pictograms

To the homepage of Hollfelder-Gühring Cutting Tools
To the setting instructions
To the technical questionnaires PCD/PCNB
To the picture gallery

Online catalogues


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Gühring PCD-/PCBN plants worldwide on site for you


Weltkarte PKD Standorte

Gühring Online Academy – get even deeper insights into the world of Gühring PCD-/PCBN

Digital World of Learning

As a leading tool manufacturer, Gühring offers a digital learning world with a comprehensive portfolio of training materials. Exciting, varied learning formats not only impart basic knowledge, but also provide the latest product information, underlining the appeal of the learning offer. Practical examples and interactive exercises clearly explain complex topics using high-quality videos and animations. The materials are available to you around the clock, so you can continue to educate yourself whenever you want and increase your skills step by step.


Complex components, new materials


accurate …flexible …innovative


Highest demands on tool & process