Can you use a tubing cutter tool ?
Optimal ?
How many ? Per hour ? Per year ?
Mix of sizes ? Lengths ? Tolerance of length ?
Requirements of the cut edge ?
How much money Ya got ?
Doug asked a lot of important questions, a couple more how hard is the stainless tube?
You mentioned production, how many of each?
I have cut a couple of pieces with a pocket knife, roll the tube on a work bench with the blade till you get a "score" all the way around, then snap it. that is good enough for some work. Thousands of pieces of with a plus .0005 minus nothing tolerance and a need for a clean square end demand something else.
CutTubing - YouTube
That set up works for extreme tolerances down to .020" hypo tube up to 4mm. When we needed .016" tube cut we sent it out and had it EDMed. That same set up worked duplex aluminum tubing for making cable loops with no deburring needed.
For small quantities (5 or 10 pcs)I have used a threading tool to cut tubing on a lathe, after that the ends would be faced square, to length and deburred.
Your saw blade on a Dremel is akin to the carbide blade used in the video except with almost zero control of feed. I imagine the teeth would be chipped right away then the dull tool will push the metal instead of cutting.
Never used the abrasive cut off tools advertised by the tubing suppliers but I would think they would push a pretty good burr ahead of the edge and not give as square and precise cut a carbide blade on a horizontal mill.