How to Use Keyhole and T-Slot Router Bits

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Here I go through the process of making a t-slot cutter from a piece of O1 tool steel It works in

I am attempting to cut a 58 slot on A36 steel using a woodruff cutter in a HAAS Mini Mill t scratch the part The only mismatch is inside the boss T-Slot Milling Cutters 3mm Depth 25mm Cutting Dia 8 Flutes HSS Shank Diameter 12mm T Slot End Mill High Speed Steel Keyway Knife for Shallow Groove

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