Solid drill bit CrazyDrill Hexalobe

for titaniumfor stainless steelhigh-performance

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. CrazyDrill Hexalobe and CrazyMill 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 time-consuming milling process can be done with helical interpolation (with max. pitch 0.8 x d) or with side milling (with stepover max 0.5 x d). 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).