Solid drilling tool EHSE-TH

for hardened steelcarbidehigh-performance

TH Coating and 4 guides with double margins make it last even longer. EDM, which is generally used for drilling hardend steel, has been the biggest impediment to reduction of maching cost. The Epoch TH Hard Drill for hardend steel was developed to solve this problem. 01 Features for Epoch TH Hard Drill TH Coating has greatly improved surface hardness and heat résistance, resulting in machining efficiency and a longer life for the tool. Your problems can be solved by micro grain Carbide with toughness and wear résistance. Four guides with double margins and a thick web enable stable drilling without run out the drill tip. The 20° hélix angle and concave cutting edge can constantly remove small chips. Chamfered cutting edge can moderate stress concentration at corners of blind holes or of hole bottoms. Selection of cutting conditions ① The above conditions apply to a hole-depth of 3 times the diameter or less. ② Cutting performance may vary according to the material being cut and its hardness. ③ Mount the drill on a collet without any flaws. Adjust the drill run out to 0.02mm or less. ④ Supply a sufficient amount of cutting fluid (Water-soluble, dilution of 20 times or less) to machining points. ⑤ Sufficient cutting fluid is not supplied in the case of a turning machine or other machine used in a longitudinal direction. 　 Use values of 70% or less of those in the above chart. ⑥ The drill can start drilling with high performance and accuracy. It is not recommended to conduct positioning using a center 　drill or a starting drill because it may cause chipping　 When conducting positioning, set the feeding length to one third of the value above.