Solid milling cutter CrazyMill Hexalobe

deburringdrillingthread

Most of medical screws are machined on lathes, on the main spindle the thread and on the sub-spindle the hex lobular socket. That particular operation is usually slower and defines the cycle time. With every second of time saving the manufacturer wins: time and money. CrazyMill Hexalobe and CrazyDrill Hexalobe are solutions developed by Mikron Tool to achieve a clear improvement of efficiency when machining medical screws made from Titanium (mainly Titanium Grade 5 ELI / TiAl6V4 ELI / 3.7165) or Stainless Steel (mainly 316LM / X2CrNiMo18-15-3 / 1.4441). Thanks to a perfect machining strategy and adapted parameters, the machining of hex lobular bone screws (better known as „Torx®“) is 50% faster, guaranteeing also a high degree of precision of the profile and achieving nearly burr-free results. Mikron Tool offers with the Hexalobe-program a turn key solution for machining medical screws, which is not only based on the cutting tools, but also delivers a package with the best machining strategy and the right parameters. The most efficient approach to machining „Torx®“-screws turned out to be the one which could do it with a minimum of different tools: pre-hole drilling with 120° chamfer – milling the hex lobe – subsequent deburring. The four operations (pre-hole drilling – chamfering – milling – deburring) are completed in three operations with two tools. First the combined drill CrazyDrill Hexalobe does the center bore and a chamfer and this right away with an excellent surface quality (Ra 0.2µm, Rz 0.8 µm). After the milling of the final shape, this tool will be used once again for deburring → a nearly burr-free surface and superior surface quality are achieved.