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Yeah, whip off the wheel, chainset, drill a 6mm through each bolt, left hand tap into the bushing and knock out, replace and rebuild. 20mins. I’ll time the next one I do without rushing etc.
Rhobbs-
drill a 6mm
What's the drilling through bolts for? Is this when they're seized?
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I honestly think 20 minutes is a bit optimistic, the fastest I can change it is 25 minutes.
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I’ve found that when you drill the head off one side, the other bolt rotates when you try and decapitate the other bolt. How do you stop it rotating? I usually saw it off at that point. Also, what tap do you use? You screw it in and punch it back out from within?
veLLo
edscoble
jj72
£20 is quite cheap for a labour that usually take 30-45 minutes (depending on condition of Brompton).
We are talking about the main hinge right? removing rear wheel, cutting off the hinge as pre instruction from Brompton, removing the brass washer, etc.