37 degree or 45 degree brake flares

Hi All,
What's the difference if I use 37 degree flares on my brake lines instead of the 45 degree. I own a hydraulic shop and we use the 37 degree flare on 3/8" .049 tube 5000 psi systems all the time.
I am planning on using 5/16" .035 or .049 stainless steel lines for my brake system. I can get the adapters and hose ends to match the MC and calipers. The reason I'm asking is because I have all the flaring tools and fittings for the 37 degree in stock already.
Thanks
Paul

 

37 degree will work no problem. I've run 37 degree Areroquip fittings on their teflon stainless braid flexline for brake lines for years without problems. I've also run 37 degree "female" fittings on 45 degree male fittings without issue.

Kipp

 

Should not matter. I think the DOT requires 45-degree double flares, but from a technical standpoint it won't make a difference. The 37-degree AN fittings are better for repeated install/removal cycles.

 

Thanks, I didn't think it would matter. It looks like the 45 double might be a stronger flare for the vibration but I plan on clamping them down close to the termination points with GOOD clamps.
I just looked at my F450 and it has 1/4" tubing out of the MC I dont see the need for 5/16" tube do you? My calipers aren't even close to the size of the 450's.

 

BTW, HAVE A GREAT THANKSGIVING!!
Paul

 

No point on using 1/4" lines unless your going with vintage Ford parts. If you using modern stuff then go with 3/16", reason I like the 45 deg stuff is no adapters needed (plus I have the tools for it).....remember the more connection points the more places to leak.