Cycling in Sydney Australia
Doing some renovation on my steel bike and have two stuck M5 bolts and might need some heavy engineering assistance.
#1 is in the steel fork, mid fork rack mount eyelet, steel M5 bolt that has been there since new (about 2 years) , had about a 3mm hex socket which is now completely rounded by my attempts to get the bolt undone. Have applied WD40 liberally a number of times, filed some flats on either side to grip with multigrips but refuses to move, I am afraid that if I use more force the head will snap off. The same bolt on the other fork came out without any drama.
#2 Rear seat stay rack mount, I have had the racks off for 12 months and had put in some pretty anodised aluminium bolts (with grease) to keep water out but when I tried to remove this one it was not as easy coming out as the similar on on other side , applied a little more force (not much really) and the head and a few mm of bolt snapped off leaving about 10mm in the eyelet, nicely recessed so I can't get at it.
The local LBS is not keen to touch them, any suggestions where I might get some heavy assistance at removing / drilling them out or other magic tricks.
I've had good success with thermal cycling, whacking with a hammer, and WD40. Though Sam's brew sounds interesting.
Basically, the thermal cycling and hammering provide a bit of shock to the joint, causing them the move apart and let the oil in. It can take a few days, but using that technique I've gone from a bolt so seized I can't move it, to one that came out with barely any effort at all.
I want this to be a TV mini series. BOLT season one ...
That's very good
hah that's awesome
Bolts do occasionally do that - ie having another go another day will sometimes do it.
Also center drive spanners will often move a stuck bolt that is rounded off from a loose shifter.
In passing you may like to read a classic story about a stuck seatpost in the frame of a friend of mine...
and this bloke who is a major bike nerd PLUS a bike mechanic during the day is offering a prize to help de-stuck his bottom bracket...
(comments/ suggestions also feature cola!!)
bees wax is said to be good for making sure bolts don't seize
Any chance of a picture of the modified offending bolt head ?
And subject the kiddies to Fe2+ porn?