Bubble Flare Tutorial

[moss1972]

Hi Guys,

In the spirit of giving back once again I have documented the process I found most successful for creating the ISO / Bubble Flare for the brake lines on the Fiat. I have a 1979 Spider 2000. This process worked fantastically. I went through 12 attempts before finding the one that yielded the best results. This is using "cheap tools" so they are not pro grade, but they went on, did not require very much torque at all to seal and DO NOT LEAK. That's all a guy can ask!

https://www.youtube.com/watch?v=BlW5tTVQuTA

[DieselSpider]

You can use the deburring tool that comes with some tubing cutters or a stand alone deburring tool instead of the dremel which will save time and give more consistent results. One critical step after deburring is to blow out the tubing to ensure no metal particles from the cutting or deburring process remain inside the brake tubing.

This style is nice because it has both inside and outside cutters that will deliver fairly consistent results:
https://www.amazon.com/Inside-Outside-T ... ive&sr=1-5



One additional point to keep in mind is that the tubing clamp has a flat and a tapered side so one has to be cautious and only use the tapered side so that you create a correct Bubble or ISO Flare and not one with a very sharp bend on the back that can cause to fitting to leak or shear off in the future.