Drilling a straight and centre crosswise hole through a tube is notoriously difficult. You have one additional challenge on the brake bridge and that's getting the angle right too. Create a little jig for the job and make sure of your angles first. Start with a pilot hole and then progress with a step drill. A standard twist drill creates a triangular hole slightly bigger than nominal size.hello I'm looking for any pointers/ tips, with drilling out the rear brake bridge, I was going to try to hand drill with a 8mm drill bit and mole grips to fit recessed brakes, the forks look straight forward enough to do
Exactly correct, the front brake caliper is identical to a rear, they just have a longer bolt.The easiest way round this is to fit a front brake there using a nut, or buy a nut fitting brakeset.
I'd be wary of taking a drill to an old frame.
Unlikely to be possible on the rear, as the seat tube will be in the way. Most brake bridges are drilled before brazing.hello I'm looking for any pointers/ tips, with drilling out the rear brake bridge, I was going to try to hand drill with a 8mm drill bit and mole grips to fit recessed brakes, the forks look straight forward enough to do
Not to mention that they generally don't have enough 'meat' to allow drilling without becoming weak if they're just a piece of tube, then there is the fact that ideally you need a pair of concave washers to fit them securely.He wants to adapt the rear brake bridge to accept a sleeve nut - but things are going to get in the way, given the angle, the available space and the direction of drilling.
|Thread starter||Similar threads||Forum||Replies||Date|
|R||Press fit bottom bracket tool||Bicycle Mechanics & Repairs||6|
|Sun Dome/Sun Pipes....anyone had one fitted?||DIY, Home & Garden||19|
|Modern handle bars-bit harder to get brackets to fit.||Components, Accessories & Clothing||5|
|will any modern frame fit 11 speed?||Bicycle Mechanics & Repairs||5|