BROKEN TAP IN TITANIUM!! HELP

T

tom mayo

Joined
Jan 27, 1999
Messages
6,277
I remember reading about sticking the whole thing in something and it would dissovle the tap...what was it...I tried everything and it wont budge......Help mr wizard!!!!!
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Tom: That would be a good trick-I'd like to know that one myself. What I usually do, for small taps, is to tap them with a carbide tipped scriber (after grinding the broken surface smooth from both sides) Usually, you can shatter the tap and knock it out.
You can also try (gently) drilling the tap out with a small carbide drill. Touchy, touchy.
But, with any luck, wnough threads will stilkl be there when you're done.

RJ Martin
 
Tom,
I think Darrel posted on that topic awhile back. It was an acid. Eats steel but won't hurt Ti. I just can't recall what acid it was.

Hey Darrel.
 
Soak it in Ferric Chloride for a day or so, it will eat the steel and not the Ti. I know there is an acid that works faster but for the life of me I cant remember which one it is... easiest meathod I can think of would be to hook it up to an anodizer and burn out the steel tap, I know it works on detent balls...
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Hope it helps, I am pretty sure you have a radio shack there that you can get some ferric chloride from...
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Alan Folts...


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If a Man talks in the forest, and there is no Woman around to hear him, is he still wrong?
 
thanks alan.....what exactly is ferric chloride....right now i have it soaking in solder flux...it was the strongest thing i had in my shop.....and I tried whacking it and tapping it and whacking it....this is bumming me out.....i guess i could try the carbide drill route...but a drill that small is gonna bust for sure.....its a 2-56 tap. thanks you guys....will ask darrel too... tom
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luckily for me...i made it with three minutes to spare before they closed til mon morn...and even luckier that rob wasnt pulling a fast one on me and giving me the name of some stuff that robin hood used to stick the feathers on his arrows.....thanks guys...got it soaking now.....
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Tom,
Ferric cloride is also used to etch damascus. I've tried several different solutions and I like the ferric cloride the best. Happy Easter.
Tom
 
Works on ti fine . Most acid except a few will not effect the ti even when anodized .
Takes about a day for i to disolve the get a small scribe and clean the carbon ask out of it. I check it once in a while and clean away the ash so the acid can get to a new layer. A stiff brush will wask it carbon away..

Roll taps are the worst. They take a day and a half.. Regualr taps take a day or so..
depending on the strength of the acid..
Ferric I use 50 / 50 with water.
Coke work great for ano solution also ..
It last longer than anything I have used.
Most of the cleaner type solutions seem to in my shop get stronger and then after 30 days or so burn pits in the ti..

Good luck..

7 up does a good job for those who like to see the color... hehehhe I like the surprise
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