Single or double flare for brake lines

I know a double flare would probably be better for my 1/4" brake lines connections, but I'm having a heck of a time getting my POS flaring tool to put the initial crush in the tube for the double flare. The tube either slips in the holder or it bends to the side. My lack of expertise with the tool doesn't help any either, I'm sure. It will make a single flare relatively easily, though. I've used the single flare on brake systems before, but am always a little concerned about not being able do it "right" and use double flares. Should I be concerned about using single flared connections on my brake lines?

 

If you can not make a good double flare and must do it yourself buy a set of pre-bent replacement lines or go to the store and buy an assortment of double flared brakeline and some couplers\unions and make you own.

Mike

 

I agree...it's gotta be a double flare. This is a fuel & brake systems engineer talkin'! :Smarty: :grin:

Devon

 

You have to taper the end of the line with a file before you press the 1st flare. Steve

 

brake lines

Double,double,double. Do what ever is neccessary to arrive at double flairs.
Single will lead to catastrophic failure. :Brow:

 

Yep, just like Jason said, it's all in the tool.

 

My flairing tool must also be made by POS..... The tubing does slip when doing the initial flare. I clamp the fixture in a vise to give it some extra holding force, and it will work fine!
Be sure to deburr the tubing end, and put a slight chamfer on it like Gun-G sugested.
The height of the tubing in the fixture is aslo critical for a good flare. The intsructions should specify that.
Oh yeah, one more suggestion....Practice!

 

I would say clamp it in the vice like mentioned previously to hold it better. Then use a little oil to help everything slide. You have to do double flares though.. Oil is the key.

Bob

 

I've tried to do it myself and just gave up and ordered a complete set from inline, (not the most patient person I know.)

 

Double Flares !

Use a good quality flaring tool, as stated previously!
I borrowed a 'Snap On' flaring kit for all my lines, and did not have any problems! Double flares were required, and easy to do !
Practice a few double flares, to get a feel for it, before you start replicating your lines - it's really not that difficult,
if you have the right tool ! o No: :TU:

 

I did some brake lines not to long ago and the lines had a copper core,nice and soft to work with,made excellent flares and no leaks!..They said they are for the bubble flared cars?

 

You could find a local Autozone or something and "borrow" their flaring tool. You "buy" it and get a refund when you return it. I'm not sure of the quality of their tools though, but it worked fine for me. I have a good flaring tool, but it won't do the double-flare. Some day I'll buy the little parts I need for it.

 

That may have been the C70600-Copper Nickel 90-10 that is getting popular in Europe...supposedly easier to flare. It has burst strengths near that of the brazed low carbon tube which is a plus. Not having tried to use it on my projects or at work, I can't comment.

Devon

 

check this site out www.stu-offroad.com click on the brakes link good info

bob m