Depends on the torch type.
For any torch tip, you can obtain small reamers from your local
Smith acet and air, they are larger and I have found it difficult to
scrape out the residue. The ultrasonic works best. They also have two
rubber o- rings which must be ordered directly from Smith. They are
cheap, but necessary. Checking the rings on a monthly basis is a good
idea. If you see cracks in the rings, replace them immediately. Our
torch tips get a major workout at the school, but they are workhorse
of gas tips.
For the little torch, the reamers work well. Natural Gas or Propane
Oxy, there is less buildup. No ultrasonic here though. You should be
using only tip sizes 4-7. The ruby insert will get too plugged up.
For oxy/acet on the Little Torch, the tiny reamers are perfect for
the small ruby tip.
Water torch, best to speak with Spirag.
However, I haven't tried using an ultra sonic on the Little Torch.
Guess I should try it out.
M E T A L W E R X
School for Jewelry and the Metalarts
50 Guinan St.
Waltham, MA 02451
781 891 3854