Going real slow, with plenty of lube and backing off every half turn coupled with lots of prayer can see the job finished, but be prepared for a broken tool The nice thing about Ti is that since it is near to resistant to most acids, then one can dissolve a broken HSS steel tap out of the part using e,g. And it usually happens when trying to back off. That causes the part to swell and suddenly catch on the tap or drill, breaking it off or jamming it permanently in place.
Heats up even when turning taps slowly by hand. It tends to work harden and also it heats up catastrophically when worked with a cutting tool. And likes to friction weld with everything.ĦAl4V is pretty nasty to tap. just not possible.Īnd 6AI4V is already on the upper end of forming tap hardness/tensile strenght range. Low modulus of elasticity makes it behave like rubber and the hole is going to squeeze on the tap creating lots of friction. Don't work with it myself, just wanted to share my love of forming tapsMy guess is that titanium sucks for forming taps. Few dozen per forming tap and I'm still on the same one, the lack of removed material makes them a LOT stronger.Ĭan't help you much with coating, I have no idea what works for titanium.
I've got a recurring job running a 2-56 thread 1/2" through O1, I was lucky at the start to get 1-2 holes without snapping a cutting tap just because of how delicate they are. That said if you can go with a roll tap for 2-56 then by all means do. From what I've heard of titanium, I'd be curious to see if they'd actually work or if they'd just snap. Much as I love thread forming taps, I've heard they don't really work in materials prone to work hardening.
0 kommentar(er)
