Using a deburring tool before making the flare with the SPIN Tools is totally optional. This step is usually adopted to prevent cracks that may occur when using the conventional tools, which shape the tube by cold working the metal.
The Spin tools, however, shape the tube by hot working, through the heat generated by friction. This process preserves the copper’s ductibility, preventing hardening of the flare area.
The fact that the copper is kept annealed and malleable provides a perfect coupling between the nut and valve (or other accessories) making its application easier and effortless when compared with flares made by cold working methods.
Eventually, the use of the deburring tool is required after the flaring is done, to remove any kind of soot or metal shavings that might occur, generated by the use of tube cutters with dull blades or lack of a sharp cut.
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