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Brake line Fabricator

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R6MGS

R6MGS

Yoda
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I got a Snap on brake line fabricator from a box of parts i bought....It's the one from making double flares.It doesn't have any instructions so I was wondering if someone wouldn't mind explaining to me how to work it.

Thanks /ubbthreads/images/graemlins/cheers.gif
 
Nice....thanks
 
What is the reason for double flares? More strength?

Bruce
 
Exactly, Bruce. A properly made double flare is much more resistant to cracking. Single flares should be backed up with the appropriate sleeve.
Jeff
 
And aren't most british brake lines double-flared anyway? I've heard that using regular single flared lines... They'll leak and fail eventually.
 
Kenny, most British brake lines are ISO, or "Bubble" flared.
A true single flare line is merely flared, and a double flare has a portion of that flare bent back onto itself, providing two layers of metal at the flare junction.
Jeff
 
With the metal bent flat on itself there's less chance of a stress riser at the mating surface, less chance of cracking/leaking. To make a bubble flair, ya just forget to do "step four" -- the "flattening". I find the most important step in all this is to file the end edges on ID and OD of a piece of Bundy nice and smooth before making the bubble. I use a small "Swiss" round file. It greatly reduces the chance the tubing will split during the compression process.
 
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