Titanium Weld in Bungs

[Peter Jack]

Titanium is really muley to machine but if you want to try something interesting try cutting it with an oxy/acetylene cutting torch. It cuts beautifully and really quickly.

Pete

[bbarn]

PJ, that is evil!  I sent a guy to the grinder once with a piece of titanium to grid off a large nub...I bet he is still seeing green spots when he blinks 20 years later!

[wobblywalrus]

The book "The Racing Motorcycle" vol 2 has a lot of info on Ti.  The 6-4 is annealed.  Usually I cut and tap Ti for a 60% thread depth.  I will try a tapered hole and tapping to 60%.  It is getting that last little bit of tread depth that is the problem.  I will also use anti-sieze as a thread cutting lube.  I did not do that last night.

[Peter Jack]

PJ, that is evil!  I sent a guy to the grinder once with a piece of titanium to grid off a large nub...I bet he is still seeing green spots when he blinks 20 years later!

I'm serious, it works really well and of course you should be wearing proper cutting goggles.

In one shop I partnered in we used to weld a fair bit of magnesium. We used to do a fair bit of prep on a 20" grinding wheel. If you left the grindings on the table the next guy who ground a piece of steel saw a fairly decent flash. 

Pete

[rouse]

We cut, machine, burn, roll, thread, and weld Titanium all the time, peace of cake.

Your right, cutting with torch is the way to do big parts, fast very fast, lots of smoke, unbelievable amount of smoke, BIG-ASS Fan not enough.

Rouse