Brake line flares: 37 or 45 degree? (1 Viewer)

[disassociative]

Here is a picture of double 45* flare (left) next to a single 45* flare. The "double" layer of material on the flare is what makes it a double flare, which is nicely illustrated in trd55's image.

The 'seat angle' is where the 45* comes from and is measured from the outside diameter of the thread or tube along the sealing face of the flare (inside on female fitting, outside on male) to the centerline of the tube. The second image below shows a 45* flare.

Double flares require two bends of the tube as well. This is partly why I had so much trouble with the stainless steel lines. The third image I've attached is off one of the flaring tools I managed to break. Drawing #2 shows how the first bend is made.

Hope this helps.

 

[Tapage]

here you go.

big thanks !

 

[Tapage]

Here is a picture of double 45* flare (left) next to a single 45* flare. The "double" layer of material on the flare is what makes it a double flare, which is nicely illustrated in trd55's image.

The 'seat angle' is where the 45* comes from and is measured from the outside diameter of the thread or tube along the sealing face of the flare (inside on female fitting, outside on male) to the centerline of the tube. The second image below shows a 45* flare.

Double flares require two bends of the tube as well. This is partly why I had so much trouble with the stainless steel lines. The third image I've attached is off one of the flaring tools I managed to break. Drawing #2 shows how the first bend is made.

Hope this helps.

At the end what did you get to make double flared lines .?

 

[Poser]

At the end what did you get to make double flared lines .?

The tooling is shown in the pictures.











.

 

[Tapage]

The tooling is shown in the pictures..

ya my bad was asking for model / brand .. but already google few ones ..

 

[disassociative]

The Ridgid tool in the pictures is for single flares, I ended up using a Matco tool for the double flares on the Cupro line. I still don't have a tool that will double flare stainless.

 

[ntsqd]

I doubt that you will find one. Single flaring SS tube is hard enough. Even annealed I don't think that it will double flare w/o cracking.

 

[disassociative]

I doubt that you will find one. Single flaring SS tube is hard enough. Even annealed I don't think that it will double flare w/o cracking.

It is possible to double flare the stainless, but you must use a lubricant of some kind or the stainless WILL crack. Even lubed, it is very difficult to get a good double flare.

Even if you get good at this, without high quality tooling you won't be able to make many. Biggest problem for me was holding the tube in place while forming the first flare (drawing #2 above). Lube just makes this more difficult.

If you're dead set on doing stainless, get something like this or plan on buying more than one tool. http://store.fedhillusa.com/flaringtools.aspx

 

[lcolon]

Thank you for the explanation and the experience. This is not something I have tried since a friend of mine redid the brakelines on his Mustang when we were in high school. Ended up taking it to a shop because we could not get it all working right... long time ago but I remained with the memory of how difficult this can be without the right experience or tools.

 

[zebrabeefj40]

I have the Mastercool tool and it works great for stainless brake line. My brother and I have replaced the brakelines on the Ford towrig with stainless line from Summit Racing. I've done countless other lines here and there with the Mastercool stuff and it works very well. Well worth the $300 we paid for it.

We also have an old Imperial Eastman manual double flaring tool that will do stainless. A little harder to do that way but it works. Never bothered to check if it was "stainless rated" just used it. The only double flaring tool I won't use is the cheapy ones on the rack at Autozone/Advance. The flaring cone on the one I bought got mangled on the first flare with standard mild steel line.

Nick

Figured I'd just quote myself rather than retype... The SS lines on the F250 are still there and not leaking. Mastercool tool still works fine but I think I might need to replace the 3/16 clamp blocks for some wear issues.

Nick

 

[rickyrockrat]

45 degree brake flare tool

I just bought a OTC-4503 from Summit Racing, for $32.97, and the very first flare I did with it looks perfect (in fact, better than the factory that made the brake line for Schucks). I'm not going to by a $300 dollar tool (though it would be nice).
This is from OTC Tools (used to be somewhere in Minnesota, and was recently bought by Bosch), part number 4503.
Here's a pic of the resulting flare.

 

[Mace]

hook it up and see how well it seals..