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Old 12-10-2012, 03:33 PM   #31
t6pilot
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Actually the best is a crimp then a dab of solder followed by heat shrink tubing, I know that's being anal, really hate to chase loose or broken wires. Being retired/retarded allows me to be that way
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Old 12-10-2012, 05:29 PM   #32
the_gr8t_waldo
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lately, i've taken to dipping the bare wire into some dielectrical grease, before crimping with tool #2. this makes a great crimp, and seals off the obvious entry points for corrosion. transfer of electricity is virtualy uneffected. for anything higher that 50 volts i woundn't use it.
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Old 12-11-2012, 07:46 AM   #33
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If you want to know if you have made a good crimp the way to test it is to pull it. It is best to test the particular wire, lug and tool you will use by pulling to destruction. In this spec in Table 12-2 are the pull specs
http://www.hq.nasa.gov/office/codeq/doctree/87394.pdf
In general you can tell it is a good crimp by the wire breaking before it pulls out. At a more practical level, just give the wire a good tug after crimping to verify it was a good crimp.

Now you can buy the ratcheting crimp tools for about $35, which makes them reasonable for home use. http://www.hamcq.com/tools/crimping-.../prod_273.html
These tools work much better than the simple plier type tools.
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Old 12-11-2012, 10:29 AM   #34
stevemd
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Quote:
Originally Posted by GSWayne View Post
If you want to know if you have made a good crimp the way to test it is to pull it. It is best to test the particular wire, lug and tool you will use by pulling to destruction. In this spec in Table 12-2 are the pull specs
http://www.hq.nasa.gov/office/codeq/doctree/87394.pdf
In general you can tell it is a good crimp by the wire breaking before it pulls out. At a more practical level, just give the wire a good tug after crimping to verify it was a good crimp.

Now you can buy the ratcheting crimp tools for about $35, which makes them reasonable for home use. http://www.hamcq.com/tools/crimping-.../prod_273.html
These tools work much better than the simple plier type tools.

I looked at the $35 tool above and the $9.99 one on Harbor Freight (search on 97420) because I need a better one. The 2 tools look the same. Not saying they ARE the same tool but they sure look the same.

stevemd screwed with this post 12-11-2012 at 11:49 AM
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Old 12-11-2012, 03:08 PM   #35
buickid
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The magic lies in the dies, they're made to be used with a specific connector. The HF one might not be an exact millimeter by millimeter copy of the "legit" ones, but in my experience, it does the job for the backyard mechanic, where most of the time we're probably using some hardware store brand connectors anyway. For $10, give it a whirl and see if the connectors stay on when you pull them. If they do, your golden.
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Old 12-11-2012, 03:29 PM   #36
machinebuilder
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Quote:
Originally Posted by GSWayne View Post
If you want to know if you have made a good crimp the way to test it is to pull it. It is best to test the particular wire, lug and tool you will use by pulling to destruction. In this spec in Table 12-2 are the pull specs
http://www.hq.nasa.gov/office/codeq/doctree/87394.pdf
In general you can tell it is a good crimp by the wire breaking before it pulls out. At a more practical level, just give the wire a good tug after crimping to verify it was a good crimp.

Now you can buy the ratcheting crimp tools for about $35, which makes them reasonable for home use. http://www.hamcq.com/tools/crimping-.../prod_273.html
These tools work much better than the simple plier type tools.
So we've gone from trying to help a guy with a small shop project to building space ships


You don't NEED a $35 crimp tool to make good crimps.

After you crimp it tug the wire to make sure its secure.

The more expensive tools make it harder to screw it up, and for some specialized connectors/terminals are the only way to crimp them.
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Old 12-11-2012, 07:10 PM   #37
troidus
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Originally Posted by machinebuilder View Post
So we've gone from trying to help a guy with a small shop project to building space ships
I'd say that a motorcycle is a harsher environment than space is. Once you get past boost phase, you really just have thermal stress and radiation bombardment to deal with.
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