Walter Tools has unveiled a number of additions to its drilling tool range, aimed at reducing cutting costs, maximising efficiency and enabling safe handling.

With the X·treme Evo solid carbide drills from the DC160 Advance range of drills, Walter aims to forge a link to the ‘next generation of drilling’. By introducing lengths of 16 to 30 x D, the tool manufacturer its expanding its range to now include deep-hole drilling. Like its predecessor the Alpha 4XD drill, which has been established on the market for a long time now, the DC160 Advance makes deep-hole drilling possible in a single operation without pecking – and therefore boasts the advantages of XD Technology.

The coating and geometry have been optimised. Just like the existing versions of the DC160 Advance, the deep-hole drills also feature the innovative new thinner web with 140° point angle and the fourth land in an advanced position. The former ensures increased positioning accuracy and reduced cutting forces in the centre, while the latter optimises the guidance of the drill.

The grades of the drills (WJ30ET and WJ30EU) are another new addition. These comprise the K30F fine-grained substrate and a TiSiAlCrN/AlTiN multi-layer coating (as a point or complete coating). The layer structure makes the drills both tough and wear-resistant, and plays a crucial part in the process reliability and performance of the DC160 Advance drills. Polished flutes from 8 x Dc also optimise chip evacuation. Typical application areas of the drills, which are available with or without (internal) cooling, include general mechanical engineering, mould and die making, and the energy and automotive industries. Walter offers intermediate sizes and special dimensions via its Xpress service with faster delivery times.

Drilling precision parts reliably

Walter’s externally cooled DB133 Supreme micro drills have become established around the world for machining precision parts. Walter has now released two new developments in micro drilling: the DB133 Supreme solid carbide micro drill with internal coolant in dimensions of 5, 8 and 12 x Dc; and the DB131 Supreme pilot micro drill, with a geometry and diameter tolerance perfectly tailored to the DB133 Supreme, in the dimensions of 2 x Dc.

Both drills cover the diameter range from 0.7mm to 1.984mm, while the pilot drill is also suitable for diameters from 0.5mm. The combination of these two drills is not the only factor behind the positive effects. Thanks to a new flute design, the chips break so that they are shorter and are reliably evacuated. A special cutting-edge preparation enables outstanding surface finish quality on the component and ensures a long tool life.

With these new products, Walter has further refined the adaptation of the L/D ratio to the required drilling depth. The result is a range of micro drills that ensures maximum stability when machining thanks to its broad scope and the optimised design. Walter offers both micro drills in the WJ30EL grade with micrograin carbide and full-length AlCrN coating, while the DB133 Supreme is also available in the WJ30ER grade with micrograin carbide and AlCrN point coating.

The drill and pilot drill can be used with emulsion or oil and are suitable for all ISO material groups. In addition to the watchmaking industry and medical technology, the premium manufacturer cites general mechanical engineering, mould-&-die making, and the energy and automotive industries as other specific areas of application.

All-round cost efficiency

When machining components made of materials with difficult cutting properties, such as turbine blades, drive parts or engine parts for the energy or aircraft and aerospace industries, round insert milling cutters are often the first choice. Until now, single-sided indexable inserts have primarily been used for this purpose.

With the indexable insert size RNMX1005M0 for small depths of cut, Walter is bringing an extension for the M2471 copy milling cutter to the market – the first to feature a double-sided round insert with eight useable cutting edges. The system for milling cutters with diameters of 25mm or more with ScrewFit, parallel shank or bore adaption is suitable for machining steel, stainless steels and materials with difficult cutting properties. Indexing using the flank face of the indexable insert ensures simple, safe handling.

The M2471 copy milling cutter brings all the benefits of single-sided round inserts to double-sided round inserts, particularly in terms of their positive cutting behaviour. To ensure that this does not negatively affect process reliability, the insert and body are designed so that their overall stability is guaranteed during use of all eight cutting edges. The technical features, as well as the eight useable cutting edges, reduce cutting material costs by up to 20%.

Walter offers the new indexable insert in geometries ‘G57 – The universal one’ and ‘K67 – The easy-cutting one’, respectively for medium and good application conditions. It is also available in Tiger·tec Silver PVD grades WSM35S and WSP45S.

On the safe side when drilling

In 2018, Walter launched a flexible all-rounder onto the market in the form of the D4120 indexable insert solid drill. The tool manufacturer is now completing its D4120 product range. With dimensions of 2, 3, 4 and 5 x D, Walter offers a wide range spanning diameters from 13.5 to 59mm.

Specially developed outer and centre inserts ensure precise balancing of the cutting forces. To this end, centre inserts slightly larger than the outer indexable inserts were selected and equipped with a corner protection chamfer. Besides greater process reliability, this plays a crucial part in increased precision and minimal drilling noise.

Walter also offers a version with wiper edge for high surface finish quality. The drilling body features two coolant-through channels and a measuring collar (Dc) for easy drill identification, even when assembled. Polished flutes and a hardened surface optimise chip evacuation and wear resistance.

The combination of D4120 and four-edged indexable inserts offers users cost-efficiency advantages and the greatest possible flexibility thanks to a coordinated system. This is of interest to users, both in the case of difficult machining operations, such as cross holes, chain drilling and inclined inlets and exits, and because these drills can be used in ISO materials P, K, M, N and S.

Users in general mechanical engineering, mould-&-die making and the energy and automotive industries can benefit from outstanding precision in hole diameters, a high degree of process reliability and cost-efficiency. Alongside the standard dimensions, Walter also offers the D4120 in special dimensions via Walter Xpress with faster delivery times.