Solid carbide drill bits for stainless,
acid-resistant and heat-resistant steel

CrazyDrill SST-Inox of Mikron Tool is the solution for reliable, accurate drilling from a drill size diameter of 0.2 mm (.008”) in stainless steels, CrCo alloys and 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 especially developed for CrazyDrill SST-Inox has extraordinary bending strength, fracture toughness and thermal shock resistance. It therefore meets the requirements for the machining of stainless, acid-resistant and heat-resistant steel perfectly.

The drill for stainless steel differs significantly in geometry from today's standards. 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 common. Cutting edge breakages are thus avoided.

The tip geometry of the drill reduces friction, keeps torque low and prevents jamming. The patented digressive helical flute is responsible for good chip removal. 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 for the customer is better tool life, greater process reliability and ultimately better productivity.

The new coating also meets all requirements. It resists thermal loads, keeps friction low thanks to a smooth surface and allows good chip removal. Moreover, adhesion to other materials is low, which prevents chips from sticking to the cutting edges (no material buildup on cutting edges).

In addition, the version CrazyDrill SST-Inox type IK has an integrated cooling. Three to four cooling channels go through the shaft. The efficient coolant jet keeps the temperature under control and flushes the chips from the helical flute. This results in better tool life and allows drilling with pecks of 1 to 2 x d. Cutting parameters increase 20 % - 30 % in comparison to the variant with external coolant supply. That’s why Mikron Tool recommends this variant to everyone who has a spindle that allows the use of coolant through the spindle.

Mikron Tool also offers CrazyDrill SST-Inox in customer-specific executions:

• Counterclockwise drill
• Drills with varying drill size diameters and lengths for the standard program

Do you need more information about our possibilities? Contact us here.