Holes from 3 to 7 mm in diameter may be drilled into solid material using Supermini HP tools without a chip breaker. While the performance data cannot compete with normal drills, the system is a practical solution if the number of cutter locations in a machine is limited. With the single-edged version, various hole diameters can be produced using a single tool.
The Supermini HP offers the option of immediately boring an inner contour after drilling without having to change the tool. An accurate 90° shoulder can be achieved at the base of the hole, while the wiper geometry produces excellent surface quality, even at high feed rates, says Horn.
The company also provides tools with a chip breaker, which are recommended for turning applications. Here, the slightly twisted flute helps to remove chips efficiently from the machining zone, while the EG35 coating allows machining of both standard and stainless steels.
In addition to the HP geometry, Horn has developed a tool holder for the Supermini type 105, whereby clamping is achieved using a tensioning wedge on the face rather than on the circumference, as was previously the case. The tool is held in place with more force, which in turn makes the entire system more rigid. Furthermore, the design results in a higher level of repeatability when changing the tool and permits more compact construction. Even when working with Swiss-type lathes, a user is able to change the tool without removing the holder.
