making very fine cuts with the 40AMP/50AMP torch

[docweathers]

What consumables would I replace if I wanted to make very thin, fine cuts on thin steel with my 40AMP/50AMP torch?

[Ray]

Assuming you have the S45 torch. There are tips with smaller orifices available, Standard is .8 or .9 mm.
I have seen them down to .6, smaller orifice, finer kerf but less power capabilities.
If you looking for smoother cuts, try using a “new” tip, raising the air pressure slightly (confines the plasma stream). Or using less current.
Travel speed and consistency (steadiness) has a big effect on how smooth the cuts are.
Mark might have some suggestions also.

[performance]

The current tips DO offer about as fine as cut as practical.

[docweathers]

Actually I am not wanting to cut with it. I am doing some art work and I found that I could make some very interesting surface "etching" with the current nozzle. However, on thin metal, the margin between etching and cuttng is very slim with the current nozzle. So, I want something a bit more delicate. And yes, I have the S45. I checked with my local welding shop and they wanted to know what brand the S45 torch was. What is it? And, where might I buy these tiny nozzles?

[everlastsupport]

Trafimetusa.com or google for trafimet S45 consumables. You will have to weeds though a number of sites. But they are out there.

[performance]

Its hard on cons, but to etch, just don't use the ground clamp and the torch will not cut.