Tough, reliable even in tough drilling

This allows for significantly improved chip removal – and therefore a higher level of process reliability and drilling quality. The coolant outlet directly on the cutting edge also contributes to the drilling body's longer tool life. The D4140 can be equipped with four different grades and indexable insert geometries. The Walter "Color Select" inserts are designed for machining a specific ISO material group and, thanks to their colour, are also easy for the user to select.

A well-proven insert seat design also contributes to increased precision and process reliability: A 100° prism centres the indexable insert optimally each time and therefore makes it extremely easy to fit. According to Walter, the range of applications for the D4140 includes solid and stack drilling, as well as inclined inlets and exits up to ~5°. They can be used on drilled holes up to 10 × Dc) inch tools now also: 3.5 and 7 × Dc) and for all materials in the ISO material groups P, M, K, N, S. Potential application areas include mould and die making, the energy and automotive industry, and general mechanical engineering.