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Compass Marine How To | all galleries >> Welcome To MarineHowTo.com >> Making Your Own Battery Cables > Crimp Position
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Crimp Position

This FTZ Industries battery lug is industry standard black color code for 1/0 ga wire and is embossed with the letters E-A for the die settings.


This E-A embossing tells you the correct dies to use when crimping with industry standardized crimpers. The industry standard crimp tool for battery lugs is generally the AMP Rota-Crimp tool. While there is no standard acceptable range that I can find for lug crimping tolerances, the Amp is the tool of choice for many professionals, industrial plants, factories aerospace, trucking industry etc..


FTZ uses the *same rotating die standard with the same letter codes as the AMP tool. I have crimped Ancor, FTZ, Quick Cable, Molex, T&B, AMP lugs & more with the FTZ tool. It works tremendously well on all those lugs with minor manufacturing variations resulting in slightly differing pull out numbers. Apparently Ancor/Marinco is now sourcing whatever they can get for the least amount of money and the tolerances are often out of whack to the rest of the industry. Their "heavy duty" lugs are also not color coded or embossed with die settings. Sometimes their lugs are fine others they are quite different from the rest in terms of heft.


*About as close as it gets I suppose, without patent infringement.


As you can see in the photo there are two positions separated by black stripes where your crimp tool is to make two separate crimps. In the picture I am in the position to make the first crimp.

Nikon D200
1/60s f/5.6 at 56.0mm iso400 full exif

other sizes: small medium large original auto
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Guest 05-Apr-2014 13:55
I read somewhere that your first crimp should be toward the head of the lug and not the wire end.
David D. Nelson 07-Sep-2012 03:31
I have been told by those who have been running Electric Vehicles for 30+ years and work in the heavy duty electrical industry that you want to crimp the position farthest from the hole first. Crimping the one closest to the hole has the potential to cause the wire to be pushed out since the crimp in near the end of the wire. The first crimp being farthest from the hole will keep the wire from moving for the second crimp. I assume that any "lug stretching" will be less than the potential wire movement from crimping closest to the hole first.
Turbinedoctor 16-Dec-2010 05:36
I think it should be stated that you will want to make the first crimp closest to the bolt hole since the lug will stretch a little and leave a gap in the top if crimped at the bottom first.