Ringwood-based
Horn Cutting Tools Ltd 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, leading to 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 the system to be used 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 90deg corner angle, maximum cutting depth being 7mm. The inserts are available with corner radii of 0.8 or 1.2mm. The proven SA4B carbide substrate is an all-rounder for milling steel, stainless steel, cast iron and aluminium. The inserts are also available in grades SC6A or IG6B for machining other material groups.
The tools are available as end mills in diameters of 32 and 40mm with two or three inserts, and as shell milling cutters having a diameter of 50, 63, 80 or 100mm. Depending on the size, there are four, five, seven, nine or 11 inserts and all tools have provision for internal coolant supply to the cutting zone.