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Old 10-13-2018, 03:34 PM   #3
RT Firefly
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City: Slicker?
Join Date: Oct 2007
Posts: 16,565
Greetings,
Mr. fb. The problem I've always had with the punch and base system you bash with a hammer is "squish" force and alignment. Hit the punch too hard and the crimp deforms. Too lightly and the thing falls apart after the first couple of pulls. Couple that with an off center or crooked crimp and failure results.


What I have found is if I chuck the punch in a drill press and place the die on the drill press base/table, one can accurately align and apply the proper crimping force to the fitting. Last summer I resized a polypropylene tarp and added grommets by using this method. Perfectly pressed grommets hardly distinguishable from factory grommets. Crimping for snaps is pretty well the same as for grommets. You need to get an even turn over of the stud.
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