I run mine on the fastest setting. I started slow, which was painfully slow, then went to the middle for a long time. Finally I tried it on the fast speed and found the blade still lasts months and months cutting stainless steel. I have tried several brands of blades and get the most life from Starrett blades. 14 to 18 tpi seems to be the happy spot where it cuts fast enough without stripping teeth prematurely. 24tpi cuts clean but requires entirely too much pressure from me pushing the steel into the sawblade to get it to cut.