High Speed Steel Stub Drills

High Performance drill for volume production. EMC drills are designed for use on CNC machines, having shank diameters to milling cutter standards for use in milling chucks. Higher cutting speeds can be employed and long tool life can be expected. Powder metallurgy. High cutting speeds and tool life. Century coating for hard, low friction surface and excellent heat dispersal, maintaining cutter edge for longer. Milling cutter shank for secure chucking and concentric chucking for precision drilling. Additional sizes also available.Cutting Speeds & Feeds Recommendations:Data in table is based on hole depth at three times diameter. Where hole depth is greater, reduce feed figure by 2030%. Where hole depth is between three to five times diameter, step drilling is recommended (as shown in table right). EMC drills are self centring therefore a centre drill is not recommended. Cutting fluid is recommended for all applications, for optimum cutting fluid should be in excess of 8 litres per minute.Step feed intervalHole Depth\t3 x D\t4 x D\t5 x D\t6 x D\t8 x D\t10 x DStep Depth\tNo Step\t1 x D\t1 x D\t1 x D\t1 x D\t1 X D