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How deep are the slots, and how deep a cut are you taking?
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Ideally 1.25 to 1.5mm slots, 4 to 5mm deep.
Tonight tried the slitting saws I have for the first time on some scrap, I realised now why they where cheap! Anyway, it was much easier than I had thought, as stated neat and straight. I am using the fine feed for the distance between the slots, after taking out the slack with head locked I can now get the fins pretty much spot on, all the same thickness, so thanks for the info everyone.
Seems to cut better with a medium speed and wd40, going slower resulted in a jam twice. The cut was thicker than the blade, I seem to have a bit of run out caused by cheap saws, or at least the mandrel |(if that's the correct name)
Tapmagic is out at nearly £400!!!! I could buy a second mill for that
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If you are using a slitting saw then full depth of cut in one pass with speed
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so if the depth is 5mm, I have a choice of cutters, one has fine teeth, and rest are much coarser but smaller diameter, does the speed vary according to diameter? The saws say 20000rpm but the machine surely is much less than this?