Sigh.... I was putting in some new bottle cages on my bike tonight when one of the hex screws broke of in the frame. I have no idea how to get it out. If anyone has any ideas I would greatly appreciate it. Thank you!!!
(1)Try to back it out with some needle nose plyers. (2) super glue the broken bolt head and shaft to the surface of the broken bolt, let it dry, no glue on the sides, back it out softly (3) drill it and use an ez out to pull it out.
I hope this helps. It really sucks when this happens.
If you've got something sharp and fairly tough, you could try to scrape a slot into the top of the trapped bolt deep enough that you can get a grab in it with a small flathead screwdriver. Dremel with the right bit would do it too. If you're feeling salty, just try to set a small screwdriver into it with a hammer. Sometimes it works like that, sometime you have to go back and enhance the slot.
Don't use a big hammer.
Sunday River Mtn Bike Park
Wachusett Brewing Co.
For me, drilling and a screw extractor has been the easiest. Use a left-handed bit. Sometimes the broken portion starts to spin. You want it to spin out. Though it wouldn't be the end of the world if it fell into the frame. Just that much more trouble.
"Don't buy upgrades; ride up grades." -Eddy Merckx
Find a flexible solid plastic rod that has a diameter a bit smaller in size as the bolt that got stuck. Chuck the other end in a drill with a reverse function and the other end on top of the stuck bolt. If the bolt is not tight enough, it would easily come out. This is the technique our fitters use in our machines with snapped bolt.