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How to bend PX12 brakes 80mm to 90mm

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awesam
Posts: 14 - Karma: 35
so I've got a pair of px12s with 80mm brakes I wanna mount on some 87mm volkl walls.

I've read the px brakes are harder to bend than most other brakes, and I've tried bending them using the pole technique but they wont budge.

I'm gonna try using a blowtorch to heat it up and bend it in a vice, does this sound like the right way to go?

Also, anyone know how to remove the brake from its housing? I've taken the brake part off, but I can't seem to find a way to get just the brake part it out of the plastic/metal housing, so havent been able to put it in a vice properly, and worried that if I do go and heat it with the blowtorch, it'll melt the plastic.

any techy ideas?
Jun 25 2010 6:31AM
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suckmyjagon
Posts: 142 - Karma: 22

Use a bench-vise and a pair of solid vice-grips. 

With the brake housing removed from the binding, the vice grips should be narrow enough to find a point to grab onto the brake.

Once the vice grip is on, put the handle part of them in your bench-vice.

Now the pole technique will work as long as the pole is long enough.  Get torque on it and wiggle a bit if need be.  Bend them straight, move your vice grips, bend them back to square at 90mm. 

Remember to add about 5 mm to your measurements for the radius of the bend.

I did this move with my mojos, which are supposed to be a bitch of a bend.

here's a pic from this thread on TGR:

Click for larger image

Jun 25 2010 1:45PM
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TimmyK
Posts: 779 - Karma: 15
What i do is i have an old ski pole that is cut off to a point where it will slip over the brake, this gives you leverage now just pull slowly, you can also grab both arms of the brakes with your hands and just pull apart.  Another trick if you need just a few millimeters is to shave the plastic on the inside of the arm. 
Jun 25 2010 4:22PM
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LC.
Posts: 5952 - Karma: 2,423
Yeah vice grips are the key.

Pretty sure dude above meant subtract 5mm - if you measure exactly and then bend on the mark then they'll end up wider than ideal.
Jun 25 2010 4:40PM
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