When you're installing welding leads, a copper lug is very important for attaching the leads to the welder and the ground clamp. Proper attachement of lugs is a must, as they must take a lot of power, and be well connected to the wire to conduct it well, and because they at the ends of the leads, they also take strain from all the movement they will see during their life time.
Considering this, it's surprising how often I see welders that have lug improperly installed on the leads, most often resulting in the leads pulling partially or fully out of the lugs.
Step 1: Tools
It's rather simple and easy, all you need in the way of tools is -
large flat head screwdriver
and sometimes you might need some cutters for trimming the wire.
Supplies, all you need is the wire you want to make leads from, and a copper lug for your size wire.
Step 2: Stripping
You want to trim the wire to the full length of the lug, remember, you want all the connectivity you can get.
Step 3: Insulator beveling.
I like to slightly bevel the end of the insulator, letting me push it in slightly for a nicer look and a tighter fit. Just tkae your knife and slightly bevel the end.
Step 4: Fitting.
If you eyeballed it right, then when you push the wire into the lug it will fit nice and snug, and you'll have to really push it. If it's too long, it won't fit all the way in, to short and it will fit in too easily. In the first photo i stripped it a little too long, so I trimmed the copper a little until it fit in nicely (second photo).