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How do you remove a cracked off stem bolt from a stem?(6 posts)

How do you remove a cracked off stem bolt from a stem?Synchronicity
Aug 19, 2003 9:38 PM
Happened a while ago:

Went to check the tightness of the bolts on my bike and the darned head of the allen bolt for the stem broke off, leaving the threaded portion inside. I've never overtightened ANYTHING before, and until I got my torque wrench -if anything- I wasn't doing things up tight enough.

Normally I'd bin the stem, but we're talking about a pricey IBIS titanium number here. Like the one at the bottom of this page:

Just wondering if there's some trick to gettting the blasted threaded portion out. Could I drill it out somehow? No that would bugger up the female threads of the stem. All I've done is spray it with WD40 in the hope that will eventually seep in there and I can somehow unscrew it a bit easier.

It has been a beautiful stem. A true work of art.

[Wiping the dust off the trusty flame thrower]
And don't anyone give me a lecture about spending lotsa money on expensive parts like this - for this very reason!
re: How do you remove a cracked off stem bolt from a stem?divve
Aug 20, 2003 12:18 AM
Look for a thing called an Easy Out screw extractor.
re: How do you remove a cracked off stem bolt from a stem?boyd2
Aug 20, 2003 7:54 AM
Easy outs are great to have around. Any hardware store should have them. How much of the Cap screw is sticking out of the stem? If you can access it you can use a dremmel tool or a hack saw to cut a kerf in the screw and use a screwdriver to get it out.
here's what I didterry b
Aug 20, 2003 9:18 AM
works if you have a little bit of the threaded end sticking out.

I put a thin grinding wheel on my Dremel tool and cut a straight groove across the end of the broken bolt. The I used a small standard screwdriver to drive it out.

might also be able to do the same with a pointy Dremel bit if there is not much of the bolt exposed.
Aug 20, 2003 4:06 PM
Great idea that, the easy-out screw extractor. I'll look for it.

I already thought of grinding the end of the screw, but there's nothing at all poking out, it is not a stem with a removable clamp.

BTW I don't think ANYONE in the whole of Australia owns a dremmel tool. 8-) Here they're an absolute rip off. Just thought you americans might like to know that.

Aug 21, 2003 6:33 AM
Here in the US prices on Dremmel tools have dropped dramatically since other brands started putting out high copys about 6 years ago. You can get a really well equiped kit for about $40 USD now. They are handy in some situations, but I find there use a bit limited.