Mikron Tool CrazyDrill SST-Inox

With CrazyDrill SST-Inox, Mikron Tool offers two exclusive drill types for drilling in stainless steel up to 8 x d and in the diameter range of 0.3 to 2 mm (.012” to .079”).

CrazyDrill SST-Inox type IN for drilling with external cooling and CrazyDrill SST-Inox type IK for drilling with through-tool cooling.

These drill bits differ in their geometry significantly from other products available in the market. For the first time in this drill size diameter range there is efficient cooling, which is an important factor for long tool life.

Significant advances were also made in relation to cutting performance; a drilling process that is one to ten times quicker is now possible.

Mikron Tool recommends the use of CrazyDrill Twicenter, a centering drill with through-tool cooling, as a perfect preparation for high-precision position accuracy and longer tool life with surface-hardened materials.

Additional Information


CrazyDrill SST-Inox offers reliable, accurate drilling from a drill size diameter of 0.3 mm (.012”) in stainless steels, CrCo alloys and super alloys (heat-resistant steels) as well as lead-free brass and copper.

The sturdy solid carbide shaft of this microdrill allows stable drilling without vibrations. The solid tungsten carbide, specially developed for CrazyDrill SST-Inox, has extraordinary bending strength, fracture toughness and thermal shock resistance. Therefore, it meets the requirements for the machining of stainless, acid-resistant and heat-resistant steel.

The polished tip section with small transverse cutting reduces the feed force, gives the drill good centering properties and produces short chips even in materials where long chips are the norm. Cutting edge breakages are thus avoided.

The tip geometry of the drill reduces friction, keeps torque low and prevents jamming.

The digressive helical flute is responsible for good chip removal as it is divided into two areas; one with a steep helix angle for good chip breakage and another with a flat helix angle for better chip flow. The overall result is longer tool life, greater process reliability and ultimately better productivity.