– drilling & sawing into a stainless steel cooking pot hole sizes 5/8″ – 2 ΒΌ”
– will bimetal hole saws cut stainless steel?
– what sort of saber saw blade might one use to cut a 10″ diam. Enclosed hole in a sheet of stainless steel?
If you are drilling a hole into a boiler the easiest way to do it is with punch- they are expensive (http://www.grainger.com/product/GREENLEE-Knockout-Punch-1ED81) for a cheaper option use a step drill bit- use oil to keep it cool and go slowly- but apply a lot of force.