Page 4 - How to Flare Tube Guide

Prep the tube 37 degree
Cut tubing with a wire fiber wheel, not a tube cutter. The fiber wheel is a clean heat free cut and it is fast. The tube
cutter heats up the end causing work hardening and also roles the inside edge in making it very difficult to flare. Once
the tube is cut it will have a burr on the inside and out side of the tube, this burr must be cleaned off. To take care of
the out side we use a flat file working a 45 angle around the edge of the tube. For the inside edge we use a drill and a
center drill or chamfer bit.

Ready for flaring 37 degree
Once the tube is prepped the end will have a chamfer on both the inside and outside edge. You want the end of the
tube to be as flat as possible with no burr. If the end of the tube is not prepped when a flair is applied the edge will be
rough and dig into the component.

Measure the tube 37 degree
Advance the tube through the die block so it is at the same height of the block. This is the same for all sizes of tube.
Use the side clamp to hold the tube and it can be helpful to clamp in a vise to hold the tool. With the tube clamped
start turning the top handle until the handle pops and spins with no effort. You will feel the tube forming as you are
turning. You can not over tighten this tool once the cone reaches the die block it pops and you are done. This tool has
a off set head so it works the edge of the tube out slowly for a perfect flair.

Inspect your flare 37 degree
This is a single flare so if it is shallow advance more tube up through the die block and if it is too big reduce the
amount of tube though the block. Since tubing varies so will this height. It will take a few times before it is just right.
Since the single flair has a rough edge you may want to file any burr off the edge before installing.

Consult your mechanic
This page is intended for use as a basic guide to help install new brake and fuel lines. If you are unsure about any
part of the installation procedure, please consult a certified professional mechanic for assistance. Inline Tube
assumes no responsibility or liability for improperly installed lines.

Quick Tip: Tube Flaring: Read the instructions - Stainless and steel tube flair the exact same way. The
steel tube is a bit softer and this makes it easier to flair but if you follow the steps the stainless will come out just as
nice.

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