With the latest development of the 117 form drilling system, Paul Horn GmbH now offers the option to drill into solid material. The profiled tools provide economic advantages in series production and make it possible to reduce tool costs for large-diameter holes. Horn provides the profiled cutting inserts from a diameter of 16 mm (0.630") based on the 117 tool system to customer specification for use on turn-mill centres. The patented, precision insert seat of the 117 system guarantees high concentricity and axial run-out accuracy as well as highly precise changeover to within microns. The accurately ground inserts allow a high degree of manufacturing precision, with tolerances up to 0.02 mm (0.0008") and high surface quality.This is also reflected in the production of precise grooves for O-rings.

Cost savings arise due to the ability to change the insert, the lower tool cost and the reduced machine downtime, as the inserts can be changed quickly. Furthermore, the coating cost is lower, as only the insert is coated. The internal coolant supply via the round shank at both cutting edges ensures cooling in the contact zone and efficient removal of chips.

Horn offers the tool system in widths of 16 mm (0.630"), 20 mm (0.787") and 26 mm (1.024"). Special profiles are precision-ground in accordance with the
requirements of the application. The profile depth is t_max = 9 mm (0.354"), 12 mm (0.472") and 13.5 mm (0,531"). Maximum profile width is 26 mm (1.024"). The tool coating is specially selected for each application and is available for the material groups P, M, K and N. The round shanks are available with diameters 16 mm (0.630"), 20 mm (0.787") and 25 mm (0.984") in designs A and E as standard. Horn also offers special holders with greater support for the inserts. All variants have an internal coolant supply.