Version :3-flute drill, specially developed for use at very high feed rates. Outstandingly suitable for machines with high installed power and stable operating conditions.Special cutter geometry with stable cutting edges and large clearance at the centre enables very high feed rates.The patented tip is optimised for chip flow and generates low cutting pressure with good chip breakage. The sector-leading technology of the drill point guarantees optimum self-centring behaviour. 3 guide chamfers guarantee a stable exit from the hole and an exact roundness of the hole.

Note :Flute length LC = L2 + 1.5 × DC. For process reliability when using the 12×D drill, an initial centre drilling with an NC spotting drill No. 121130 with 155° point angle is necessary.