This material is the standard high-cobalt material used at Metalbor and gives excellent performance at high rates of cut in both standard and highly-alloyed steels, cast alloys and Titanium alloys. It tolerates vibration and interrupted cuts. It is in most respects superior to M35 5% cobalt HSS which is used as the standard cobalt material in Europe.
Round toolbits traditionally are offered in a more limited variety as standard, but because of their routine method of production, specials are much more easily and quickly available to order. They are usually finished with ends ground at 90° to the length, but some smaller sizes may have coned ends. This is because they are most often extracted from the drill manufacturing line. Tolerance on diameter is generally tighter than for squares, and toolbits ex blanks from drill manufacture will have the same h8 tolerance as finished drills.
