Soldering, 8ga to 8mmthe bullet connector

[Fella1340]

Hello all, I am in the process of attempting some soldering as the title says. I am finding it tricky to say the least. If you could share how you prepare and go about doing it I would very much appreciate it
My biggest concern is the space left to fill with solder as the 8ga wire is smaller than the connector itself. Gap filling with solder seems a bad idea to me, I can understand why a lot of people have connections come apart on them under heavy amp draw. I.was thinking of driving a small.diameter piece of copper up the center of the wire to get the mire to spread and fit the connected properly. Any suggestions!
I need help!
Thanks
Jeff

[Doby]

Make sure that with insulation is stripped as far back so the maximum amount of wire is in the connector.
Use a RMA flux on both the wire and the connector.

Pre solder the wire and the connector separately.

Make sure you have a powerful enough soldering iron!!!!

When joining the pre soldered connector to the pre soldered wire, use RMA flux again!

Heat both up at the same time and then apply more solder to help the two join.

The biggest thing to worry about with those gauge wires is to make sure you have the proper soldering iron (Big one)

When done, clean off the RMA flux residue.

Can you post a link to the connectors you are using?

[rickwess]

Did a quick google and this is pretty much how I do it. You will be filling the "extra space" with solder.

The important part is to make sure there is enough heat transfer when you place the wire inside the bullet connector. Keep the soldering iron there for a few seconds.

http://www.youtube.com/watch?v=MnldHRtjre8

[ray schrauwen]

Lots of Ontario'ians in here, cool The more the merrier.

[Fella1340]

Thank-you very much for info. The bullets were from kintec, they were cheaper
By far from the others. I thought quality may have been a concern so I tried the castle ones
with the same results. I was using a 80watt Weller iron. People have posted about the great success
they have had with them but I found to much head was being put into the wire (esc lead) than should have been. Seemed to take to long to bring to temperature. I picked up the weller200/250 yesterday and am hoping for better results. The gap still bothers me a lot, the wire should fit snugly into the connected so the wire is.in contact all the way.around rather then letting the solder do such a large8
part of the current transfer. In industry running DC drives (or AC) when pulling those kind of amp
the connection would be made by crimping or being sandwiched together like you would see in a
relay. I realize we can't do that here but I still don't like the idea of such a large gap. Please tell me if
It makes no difference and that I should just get over it already! I suppose may be making an issue out of nothing. Thanks for the help. I will watch the video tonight rickwess and try your step by step tonight with my new iron!
I have also tried the torch, keeping temperature is tough though. I keep flashing of the solder, that makes a nice mess!

[Doby]

can you post a pic of the gap that concerns you?

This is what I use....100W! With a big assed chisel tip...heat everything I have thrown at it so far..

http://www.flexibleindustrial.com/FI-Products/Weller-Soldering-Irons-Category/Weller-W100PG

[Fella1340]

Hi Don't, I just tried taking a few photos. I only have my phone and I couldn't get a close up.
I will have to get that straightened out before I start this build! It doesn't seem to be an issue
with you guys so I will leave it at that and just fill the gap. To bad the connectors weren't better
Sized for 8ga. I have my new soldering iron to try out, hopefully that does the trick. I have a
feeling that my 80.watt Weller wasn't putting out what it should. Still open to ideas though!
I will post back tommorow to report my success or failure. Thanks guys

[Fella1340]

That was supposednto read doby, spell correction at its finest!

[rickwess]

It's not my video, but it almost exactly what I do.

You can always drop down to 6.5mm if you are concerned. They're rated at 200A.

[Fella1340]

I watched the video, it was very good. Got out the new iron and retinned the existing wire leads.
I never would have thought to re tin factory done leads. The process worked as it was supposed to!
Very neat job, although still don't like that its not a snug wire to connecter fit. I will just have to get
Over that! Thanks for the help it was really appreciated. Jeff

[rickwess]

Glad you're all set.