Housing doesn't compress that way.
Two possibilities come to mind.
1- that isn't cable housing, but hydraulic line, and therefore lacks compression strength altogether. This is easy enough to confirm by looking at the ends which should have a circle of steel strands cut end on. Anything else, ie a bunch of thin strands, vs roughly 15-20 rigid wire ends, and it's not cable housing.
2- you used the wrong style ferrules, with conical bottoms, and the structural strands are pinching toward center and extruding through.
Just looking at the outside, I lean toward hydraulic line, but that's just based on cosmetics.
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Last edited by FBinNY; 07-25-15 at 07:44 PM.