I have been using Hypertherm's finecut nozzles to cut 14ga with my model PM1000 plasma. It seems that I am only getting about 10 minutes of cut time and maybe 60 pierces before the nozzle hole gets too big and starts gouging instead of cutting through. I am using the recommended settings of 40A, 79THC, and 130-135ipm speed with a 3/16" pierce height.
Is this short lifespan normal for these tips, or do I have somethig set up wrong? I am buying 5 nozzles for about $22, or about $4.40 each - anything cheaper out there?