Specially made for the machining of austenitic stainless steels, the twist drills EF-Drill-VA are available in the designs acc. DIN 6537 short (3 x D) and long (5 x D).

An increased number of flutes, plus a redeveloped geometry and a general optimization in relation to the standard GSF and GF series, permit faster machining, a smoother operation, and, as a result, increased tool life.

Depending on the material to be machined, the extended cutting part and the long chip flutes of these machine taps permit the production of thread depths up to 4 x d1. These machine taps are now available in sizes from M20 to M48.

Sophisticated roughing operations in High Performance Cutting (HPC) ­demand extremely high clamping forces, which usually can only be reached by form closed clamping (e.g. side-lock). The cause of this pull-out happens due to a micro-creeping motion of the tool inside the chuck, as is the case when using shrink-fit chucks with high cutting-speeds and high pull-out forces. The combination of spiral-fluted grooves in the tool shank ends, gripped by form closed drive keys inside the chuck and the counter-rotating load on the cutting-edge provides an enhanced fixing of the tool.

The latest model series Softsynchro® Modular combines the well-proven patented technology of the Softsynchro® minimum length compensation with the required flexibility of tool equipment in modern production. The modular set-up allows the length adjustment of threading tools with male or female centered tool shanks. The HSK shank adaptation to the machine spindle can be adjusted for 1- and 2-channel minimum quantity lubrication systems as well as fluid lubrication. The loss-free transfer of the lubrication medium and the effectiveness of the Softsynchro® technology result in a clear improvement of the thread cutting process and are unique on the tap holder market.