Version :Developed for use with very high cutting speeds. Outstandingly suitable for machines with low installed power and high speeds.Clear reduction in cutting forces due to special cutter geometry.Coating for best wear resistance even at high process temperatures.Polished flutes for good chip clearance. A slim chisel point and the special arrangement of the 4 guide chamfers ensure high positioning and alignment accuracy. Optimised micro-geometry for increased working life and performance capability.

Note :Flute length LC = L2 + 1.5 × DC. For process reliability when using the 12×D drill, an initial centre drilling with NC spotting drills No. 121068 – 121130 is necessary. Form HB and HE are supplied at the same price as HA. Order form HB: with No. 123226. Order form HE: with No. 123225 + 129100HE.