
Originally Posted by
halojumper
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Q: I put my 130 together tonight. Tungsten's stick out of the Gas Lens Cup about 0.89"
quite a bit longer than the recommended 6x diameter.
I have seen reference to up to an inch being okay.
Is this acceptable? I put my water cooled SR-18 torch together, and there is plenty of adjustment room for the tungsten and the length it protrudes from the cup.
This is with brand new 7" tungsten and the long backcap
Some of the "long" backcaps are not quite long enough for 7" tungstens, only 6". The solution is to just shorten your tungsten, or get a longer backcap. You will no doubt need some short ones anyway for use in tight places with the shortest back caps, so you might as well trim a few inches off to use for that. The easiest way to cut tungsten is just to grind it. Then you are left with two roughly pointed pieces that you can grind finish points onto. Some you can just snap with your hands, but there are some that will break into a bunch of pieces if you try that, so grinding or using a cutoff wheel is best. Don't use wire cutters, it's way too tough for that.
.89 is a bit on the long side depending on cup diameter and gas flow. A large gas lens can do that, but unless you need that much stickout, it is a waste of argon as you will have to crank up the flow to get good coverage.
Long arc, short arc, heliarc and in-the-dark!