Custom Cobalt Steel Unibit Tree Step Double Slot Cone Cutting

The hole has to be 1316 diameter with a flat bottom, about 34 deep T-slots Inc does sell a bit which they call a 1316 Counterbore Cutter

34568mm Multipurpose Titanium HSS Drill Saw Bit Slot Cutting for Wood Metal · Fastener-Kingdom · % positive Feedback

slot que mais paga Choose from our selection of slot drills, including square end mills, drillmill end mills, and more In stock and ready to ship

slot alibaba So I decided to remove the metal from the slot by chain drilling and filing The bit that has to be right is the marking out and centre