Drilling stainless steel can be difficult, but cutting a hole in stainless steel using a hole saw is even more difficult. In this video I cut out a 1 inch hole in some 316 stainless steel which has about a 2mm wall thickness. A traditional hole saw will really struggle on this grade of stainless steel, which is why I use the Starrett carbide tipped hole saw.
You can buy these Holesaws at the following link https://www.starrett.co.uk/shop/power...