Sheared bolt

asprilla

Had a mishap with my bars his morning; they shited slightly when I hit a pothole on the way to work. I stopped to adjust them and sheared one of the facing plate bolts in the stem.

First question; it's sheared flush with the stem so what are my options, if any, for getting it out?

Second question; can anyone recommend a good but cheap torque wrench?


Cheers!

The Rookie

Spark erosion, drill and tap, wind through if its not a blind hole.....

Spark erosion is the best way with steel in alloy, but probably costs more than a new stem.

Drilling a steel bolt out of alloy is a pain, the alloy is softer so the drill wants to go into the alloy not through the steel, however it is possible and I have drilled a snapped bottle cage bolt out of an allloy frame and then retapped it in the past, for that I actually used a dremel and a diamond tipped tile drill to gradually remove the bolt but it took about 2 hours for a little M5!

If its not a blind hole you can often spin it right through......

All told probably easier to buy a new stem I'm afraid.

Simon

antfly

Asprilla wrote:

Second question; can anyone recommend a good but cheap torque wrench?


Cheers!

Ritchey torque key, it`s meant for bars and stuff.

davis

Broken screw extractor? One of them things with the left-handed thread.

You'd need to drill a really tiny pilot hole in the screw first, which might be tricky. Maybe with a left-handed drill bit too...