The normal procedure for drilling stainless is:
- Sharp drill
- Slow drill speed
- High pressure.
What happens if your drill speed is too high, and you’re not using enough pressure on the drill, the work you are trying to drill will “work harden” enough to dull your drill bit, and it wlll just screech and not go through the material you’re drilling.
The ladder tubing is fairly thin, and should drill through using the proper technique in a few seconds. The chips will get very hot, and that’s OK.
Remember, the main key is “pressure”.