Horn has added a variant with a precision-ground rake face to the Supermini system especially for ultra-fine machining of bores.

As a result of precision grinding of the cutting edge, it is free from notches when magnified approximately 200 times. The tool system can be used from an inside diameter of 0.3 mm (0.012").

The sharp insert geometry enables process reliability even with very small infeed and cutting feed rates. The specially developed coating is suitable for stainless steels, non-ferrous metals and other metallic materials.

The insert of the Supermini Type 105 system requires only one tool holder for well over 1,000 insert variants. This applies equally to left-hand and right-hand versions.

The carbide inserts are available in coated and uncoated versions in different grades for every application including hard machining up to 66 HRC.

The patented droplet shape of the cross-section has a vibration-damping effect and delivers excellent repeatability when changing the insert. Internal coolant supply to the insert increases tool life, enhances cutting performance and improves chip removal.

Horn offers the tools with elements for face clamping. This allows, for example, the insert to be changed easily without having to remove the holder from the machine.

History Horn Supermini
In 1989, HORN launched the technically superior Supermini system at EMO in Hannover, Germany. After considerable technical development, it was possible to successfully manufacture precision internal grooving tools for bores down to 5 mm (0.197") in diameter.

​The Supermini system was born and over time became one of Horn's most successful products. In addition, the Supermini system was the first precision tool to benefit from Horn's own in-house coatings.

Carbide cutting tools have revolutionized various industries with their exceptional hardness, heat resistance, and longevity. Understanding the intricate details of the cutting process and the meticulous production of carbide tools sheds light on their unmatched performance in the world of machining. Whether it's the intense forces at the cutting edge or the precise control of cobalt binder content and carbide grain size, carbide tools continue to shape the future of manufacturing and engineering.

Paul Horn GmbH is expanding the range of carbide grades for the DAH milling system to enable its use for machining a wider range of materials. The new grades SC6A and IG6B complement the tool system for high feed milling. The expansion gives customers the opportunity to choose grades best adapted to their machining applications. 

The SC6A grade is suitable for machining the ISO M material group, as well as ISO S materials as a secondary application. Horn has developed the IG6B grade for machining the ISO P group, while it is also suitable as a multi-purpose grade for other material groups. 

With the DAH82 and DAH84 systems, Horn introduces a new generation of tools for high feed milling. The eight usable cutting edges of the precision-sintered insert offer a competitive price per cutting edge and hence economical and efficient machining. The positive cutting edge geometry ensures a soft and quiet cut as well as good chip flow despite the negative mounting position.

Horn offers the inserts in the substrates SA4B, SC6A and IG6B, which are suitable for universal use machining various materials. The large radius of the main cutting edge of the insert produces a soft cut, ensures an even distribution of cutting forces and thus ensures long tool life.

​The maximum cutting depth is ap = 1.0 mm (DAH82) and ap = 1.5 mm (DAH84).  

​The DAH82 variant is available as an end mill and as a screw-in milling cutter in the following diameters (z denotes the number of inserts):

The Challenge 
The challenge was to achieve both hard and soft cost savings, as well as time spent on drilling flanges from one side, chamfering the backside and creating a controlled chamfer on the top surface which was a secondary process.

The Solution
We designed an indexable drill with our rear cutting carbide deburring insert along with a fixed pocket chamfer insert to create the precision top chamfer that was required. The spade drill insert also had a special feature that allowed it to chamfer the top side of the bottom hole that was pre-drilled.

The Results
​Four operations were completed in one pass.

The EZ Burr Burr-Free Drill drilled the hole, deburred and chamfered the back all in one step, thus eliminating the secondary step of chamfering the bottom surface on the top hole.

This saved time as well as money, plus the tool life of the Burr-Free Drill achieved a more consistent result and had a longer tool life than the previous method.