Chain drilling and milling a slot tool, steel

Does anyone know where I can get a 4mm end mill or slot drill with a shank? This is the biggest collet I can fit in my spindle

HSSCo8 Long Slot Drill 4mm The YG1 Brand HSSCo8 Slot Drills are high-performance cutting tools designed for demanding milling applications Made from high-

amazon slot Until now, I have held end-mill slot-drill cutters in ER25 collets And 4mm Metric Collet crunched down to Despite a deep rooted instinct to

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