Help! > Mistakes, muckups, and dangerous behaviour

Broken screw in die

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awake:
How small is a 12BA? Yet another option, if you have a mill, is to get some cheap carbide endmills from eBay or other sources, assuming you can find some small enough. Spin the endmill as fast as you can, and peck out the screw.

I had to do this recently after breaking a tap in a part - in my case, 2mm endmills were an appropriate size. Obviously, the larger the endmill, the less fragile!

steamer:
I see at least 2 plausable ways to do it.   I'd go for the ball end mill myself...but the piercing saw will work if the screw isn't hard.

Dave

tghs:
being at under 1/16th for 12BA take a dremel and grind out the threads,chips and burrs in the round holes near where break happened,, then try a #60 drill from the back side,, it may spin out.. no use wasting a HSS die..

Jo:
The tapping size for a 12BA is 1mm. Things will happen very quickly with power tools in the  die  :paranoia:

Jo

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