Deep holes in one operation — when it comes to this, the XD drills from the Walter Titex brand are reportedly unbeatable. This is true now more than ever, as they have reached a depth of 70xD. Standard depths are up to 30xD; Depths up to 70xD have been achieved in special cases. If we were talking about a slow and gradual approach to larger depths before, we can now talk about a leap.

Factors responsible for this huge increase in performance are essentially three special structural and manufacturing features: Walter is producing solid carbide blanks by applying a new method, which makes this type of long solid carbide twist drill possible. The finishing procedure utilizes a special grinding process. As is the case with all XD drills, cooling is provided by internal coolant channels. Despite the deep drilling depth, high-pressure coolant systems are not necessary.

"On the one hand, the XD70 is based on the technology from its shorter cousins, on the other hand, several unique details make it a completely new tool," according to product management at Walter.

The XD70 is currently being produced as a special tool, in diameters ranging from 0.197" to 0.472" (5 to 12mm). Two tip coatings are available depending on the material: TFP for soft steels and XPL for cast iron.