- Rounded bolt in stem- how to drill out?
Assuming the bolt is stuck in there due to a rounded Head? Try undoing the bolt with a similar sized torx bit maybe inserted with the help of a hammer. If the thread is seized give it a dose of plus-gas and try again.
If you do have to drill, with the bolt being obviously much tougher than the surrounding stem body the drill will likely wander and I suspect you will need to re-tap the hole at a larger size if you want to re-use the stem.Posted 4 years agoNorthwindSubscriber
Left handed drill bits sound like the sort of thing you’d send the new boy off to find on his first day but they do exist 😉 but yeah in this case try the other end of the bolt.
Torq should be first point of call though. I’m assuming it’s the steerer bolt not the faceplate? Is it stuck in a bike currently? If not chucking it in a jar of diesel for a day or so for Ultimate Unseizing could help. Drilling a bolt out is generally harder than just removing it.Posted 4 years agoVanManMember
This is why I have a set of these:
work a treat to fix my ham fistednessPosted 4 years ago
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