I have used the Pulsar to tap from 6/32's to 3/8-16's so far. No hint of any torque issues. I don't have a reason to tap anything bigger and 1/2-13 might be the largest practical tap you would want to use. Anything larger then thread milling would probably be the best option. As for smaller taps, it should have no trouble with those either. It is very smooth when tapping and it just doesn't break taps unless it is operator error.