The best drill bit for steel, CrazyDrill Steel, is available in the diameter range of 0.4 mm to 6.35 mm (.016” to .250”, fractional inches available). The standard drilling lengths are 4 x d, 6 x d and 7 x d.
Pilot drilling or centering is recommended on irregular or inclined material surfaces, when there is need for high position accuracy and generally in holes of more than 4 x d at a diameter of 0.8 mm (.031”). These are carried out ideally with the CrazyDrill Pilot or with CrazyDrill Crosspilot when drilling on inclined, convex or concave surfaces. Both pilot drills are perfectly adapted to CrazyDrill Steel in terms of diameter and tolerance (no measurable transition and no jamming).