New indexable insert mills from Horn

Tooling manufacturer Horn has expanded its DA milling programme for corner, face and plunge milling. Suitable for roughing or finishing, the new DA65 system uses a larger insert than the existing DA62, enabling greater axial depths of cut. The patented, six-edged, indexable insert can be used on both sides and has three axial and three radial cutting edges per side, providing an economical cost-per-edge ratio.

The sintered, trigonal insert has a thick cross-section and, despite the negative lead angle, exhibits a positive cutting geometry, ensuring soft machining characteristics and reduced cutting forces. The selected axial and radial rake angles result in low torsional moment and less transverse load on the spindle, allowing use of the system on older and less powerful machines. A further advantage of the chosen axial rake angle is efficient chip evacuation, especially during helical plunging.

The cutting edge profile generates a precise 90-degree corner angle, the maximum cutting depth being 7 mm. Inserts are available with corner radii of 0.8 or 1.2 mm. The proven SA4B carbide substrate is an all-rounder for milling steel, stainless steel, cast iron and aluminium. Inserts are also available in grades SC6A or IG6B for machining other material groups.

Horn’s new tools are available as end mills in diameters 32 and 40 mm with two or three inserts, and as shell milling cutters having a diameter of 50, 63, 80 or 100 mm. Depending on the size, there are four, five, seven, nine or 11 inserts. All tools have provision for internal coolant supply to the cutting zone.