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Hi GerritNice one! I also have a cut knurler for a few months now and have been experimentig with it a little. What i found is that brass is a little bit tricky because the swarf tends to stick on the wheel and gets rolled back into the knurl, clogging the wheel and also the the knurl itself - which finally results in a poor finish. So what I tried was running it backwards and that worked pretty well - most of the chips fall down then. For steel, it seems to be better to do several passes for a good finish. I would be best to use a stream of coolant for knurling - but i don't have this on my lathe. I want to try a fogbuster (or similar) to see if this works for getting the swarf away but i'll first have to buy or make one. Florian
I will try the run-in-reverse idea next time I do a knurl, great suggestion.
I also thought about just a light stream of air to remove the chips right where they are produced.
McGyver (published in HSM) designed and built a cross hath cut knurler, it uses 2 straight wheels.