DIN Specification for Convex Flare
DIN Specification for Convex Flare
(OP)
I am trying to find the appropriate DIN specification that would specify the dimensions/tolerances/etc for flared tubing used in european automotive braking systems. Particularly I need to know the dimensions and tolerances for the DIN Convex Flare.
I found document DIN 74234 at ihs.com and techstreet.com but there is not enough information in the description to tell if it is the data I need.
Any help appreciated.
Thanks.
I found document DIN 74234 at ihs.com and techstreet.com but there is not enough information in the description to tell if it is the data I need.
Any help appreciated.
Thanks.





RE: DIN Specification for Convex Flare
It describes the dimensions and tolerances of the inverted flare (Bördel E) and the convex flare (Bördel F)
for the tubing of outer diameter:
4,75 mm / 6,00 mm / 8,00 mm / 10,00 mm.
The most usual dimension is 4,75 mm.
Unfortunately the standard is strongly protected by copyright, but IHS is a very quick source.
You also will need the DIN 74233 part 1 for the flare nuts and part 2 for the bore-holes.
The tolerance js14 (outer diameter) is acc. DIN ISO 286-1:
3 ... 6 mm: ± 0,15 mm
6 ... 10 mm: ± 0,18 mm
10 ... 18 mm: ± 0,215 mm
With the DIN 74234 you will have now all the data you need for the end forming.