What is the best bit to drill thu 316 stainless plate

[Mr. Sandman]

I normally don't use that many bits either, ...maybe break one per year. But I got carried away with this.

I may abandon these plates and start again with fresh material, bits, and a new perspective.


I have to figure this out because I have another project where I have first make 6 bends then drill a doz or so small holes thru 1/2" SS 316 tubing ( I am also buying some Al tubing just in case this turns out bad but I would prefer using SS)

[Mr. Sandman]

Ok...Thank you for your advice. I have it working now.
I did it slowly reduced rpm, light pressure and in 3 steps increasing the bit size, and lubed. No smoke, no damage to bits. It took a little while but it's went thru and the bits still cut.

thanks