Being a novice mechanic I have a question...
Q. Should I be flaring my brake pipe ends with a single or double flare?
I'm guessing that as the hole seems to have a cone shape going away the single flare would seem to fit the shape better.
Double flare every time as it gives better sealing
Assuming the following meanings :-
a)Double flare = Flare cone wrapped back inside itself (2 x wall thickness)
b)Single flare = Flare in double cone form, with dia going min-max-min;
Single flare used in most "standard" Euro/UK brake ports. Double flare used by Japs, and sometimes in ally cast bodies (because steel or brass
inverted cone inserts are used). The inverted cone seat determines the use of the double flare.
From lengthy experience in brake engineering, the double cones were preferred where repeated tightening/untightening was needed.
Dick Axtell (ex Girling/LucasGirling/Lucas Automotive/LucasVarity/TRW).
quote:
Single flare used in most "standard" Euro/UK brake ports. Double flare used by Japs, and sometimes in ally cast bodies (because steel or brass inverted cone inserts are used). The inverted cone seat determines the use of the double flare.
As someone that struggled like mad to understand how to make a flare when his tool came without instructions, I can hardly claim to be an expert here.
However I have piped up my car sucessfully now, so here goes!
A single flare is the one that looks a bit like a 'mushroom' head. A double is when you push the tool into that flare to bend it back into the 'belled
out' shape.
On my car, some of the existing fittings already dictate which to use. A concave milled hydraulic item can only take a single flare.
When I had to join items together I used a double flare.
Once you get the hang of the tool its a synch. Just get a tube cutter and a small needel file to chamfer the ends before flaring
atb Steve