Rotary broaching a 3/8″ Hex in 416 Stainless Steel using a Haas TL-25 lathe and Polygon Solutions GT Rotary Broaching Tool Holder.
It is possible to rotary broach stainless steel but you will need to choose the correct broach material. For 300 series such as 303 or 304 stainless steel we recommend PM M-4 and for 400 series we recommend PM T-15.