I don't know if this is a thing or not, but your RPMs leave the feed at a never ending decimal. But yeah, low revs (REALLY LOW FREQUENCY) can mess with things. I feel like it shouldn't be this hard and ready to pull all my hair out but before I do that, I'm hoping someone might have a few insights into what might be going wrong. I can run the taps by hand without too much trouble except the form tap does like to stick. I am running them in a compression head on a UMC750 and keeping them 0.05-0.070' from the hole bottom. Both taps do feel quite warm after tapping a hole. The cut tap doesn't generate as much smoke or squawk but still breaks on me. The roll form tap drives just fine but as soon as it retracts, it starts squawking and generating a lot of smoke. The drilling is going beautifully as it drills right to size and shows no sign of dulling the drill or work hardening the material. I drill the hole with a HSS drill at 25 SFM 0.0025 IPR and am targeting 65% thread (verified with pins) I'm running the tap at 10 SFM (200 rpm) with liberal amounts of Hangsterfer's Hard-cut 5125-UB tapping oil. I've tried using OSG EXOPRO XPF(form) and OSG EXOTAP VC-10 (cut) taps which are specifically made for titanium and I'm only getting 5-7 holes a tap. I'm working on a job that has a few #10-24 blind threaded holes 0.4' deep and getting my butt absolutely kicked by the tapping.

Form tapping titanium