Super cut 50 plasma cutter

[I_Love_Plasma]

Should I maintain my desired pressure while air is flowing or should I set it and then cut?

Thanks as usual,
I Love Plasma

[performance]

Flowing,

I will post a video(s?) in the next day or so so that people can get the idea. It will be on the PP60, but will give you a good idea of how the unit cuts, and is operated.

[I_Love_Plasma]

Hi All,

We've been trying to build a skidloader bucket.
Many buckets have a replaceable cutting edge.

When we were plasma-ing out the angled portion cutting edge for the bucket we had the piece standing on edge, and we torched it, holding the wand at an angle, rubbing the tip on straight board for a guide. Does anyone have good ideas about how to cut this out? It turned out fairly good, but could have been better.

I've attached a picture. I'm hoping it works.

[WAYNESWORLD]

Your use of a guide is right on. The limit is the thickness of the cut and the fact you are not cutting 90 degrees to the surface. Try a slower cutting speed.
Wayne

[I_Love_Plasma]

Thanks a lot Wayne.

How would you go about cutting such a hard to do cut?

[performance]

What you are doing there is an art form. It takes skill and practice to draw a torch that distance with or without a guide.

There are limits to plasma. This is one of those borderline cases if the angle you cut was steep. A 45 degree bevel on 1/2 inch would equal about 3/4 of an inch deep cut. If it is steeper, it would be a deeper cut. It could be done on a track torch machine and would make a perfect bevel. However, hand operation is difficult and what you did is about as good as it could be rigged. A jig could be made to work, but I doubt it would be time efficient though perhaps the jig could be reused or adapted to other operations.

Now with that said, my recommendation, based of having done this myself before, is to use OxyFuel for this, since even the smallest torch will cut a long steep angle like this at a faster speed. I have both oxyfuel and plasma in my arsenal. I use both, though the plasma gets 80% of the work these days. An Oxyfuel rig will always save you in a pinch. Also, a plasma is no good at heating, welding, or brazing.

[rinktumbody]

Your use of a guide is right on. The limit is the thickness of the cut and the fact you are not cutting 90 degrees to the surface. Try a slower cutting speed.
Wayne

I bought one of those wheel guides and found it works well, except I have a hard time seeing my lines on the metal with my mask set to 9. Any ideas on how to make the shape outline easier to see with the mask down? Many thanks.

[performance]

For the larger plasmas, we have wheel guides like the one pictured.

Rink,

Generally, No more than a shade 7 us required for plasma cutting. I recommend a 5 unless its over 60 amps. The arc is not usually as visible and partially obstructed so a darker lens is not required.

With that said, I use a pair of Nemesis cutting glasses instead of the cutting shield or welding helmet. Its adequate and freeing.

[rinktumbody]

Thanks for your response. I went over to the Central Welding Supply site.
Here's what they recommend for plasma:
Current Level
in Amps Minimum Shade Number

Below 20 #4

20-40 #5

40-60 #6

60-80 #8

I'm still looking for a clever way to protect my eyes and see my drawn
lines for the cut.
Thanks again.
Jerry

[I_Love_Plasma]

I bought one of those wheel guides and found it works well, except I have a hard time seeing my lines on the metal with my mask set to 9. Any ideas on how to make the shape outline easier to see with the mask down? Many thanks.

Yeah just get a set of two 500 watt halogen work lights that drywallers use. And Black Board chalk works good, cheap too. Makes every thing light up. I use them all the time.

[performance]

Put that vise on a table....lol...

I call it the monkey squat...

[Ray]

Hi, I do a lot of “hack” fabricating, I mean “expeditious field repairs” . And have used plasma a lot for the kind of stuff I think your doing. I hate to push others products but one of the best investments I think I’ve ever made in my plasma set up was a circle cutting kit I happen to have one made by/for Thermal Dynamic, it was uber expensive, but I use it A LOT, now your probably wondering why that has anything to do with slicing off the cutting edge, or is it the bucket side? The kit has a bunch of guides and rods in it that you can put together in several ways and a magnet and suction cup base for the circle cutter, but has these cool guide wheels and a collect that fits over the torch head, there are several adaptors for different types of torches. Anyway enough of the unauthorized sales pitch.. What I do with this and most stuff with plate or darn near anything I need a strait cut on is use the wheels or if it’s a rough surface the angled point guide, against a piece of flat strap clamped or even tacked to the work, at a distance from the intended cut (about 1.75”) and guide the wheels down the edge of the strap. You may be able to do pretty much the same thing with the guide ring on the torch as well. As far as the angle you can set the wheels at different heights to maintain a consistent angle, I’m going to try to attach a picture. Hope this helps.
Ray

[I_Love_Plasma]

Thanx Ray,

I'm considering Mark's track idea. There's a potential that I'll need to cut quite a few of these out these out.
Everlast sells a metal guide wheel set, I think it's Brass or a similar product.
Please take a look at the pics I posted down there on my initial post. I'm cutting a bevel on the edge of the flat stock to create a cutting edge for a bucket.


Hey, welcome to one of the greatest forums around. I appreciate that your first post is posted to help me out.

BTW,Mark, We've got a OxyAcetylene torch but the refill prices are much more than a couple sets of 60A tips. I like Ur idea about that track system.

Thanx as usual,
I LOVE Plasma

[Ray]

Thanks, didn't intend to muddy the waters, the track sounds like the way to go , here is what I was talking about on the angle. I think it was Wayne that said somthing about a 45 deg. angle, my recomendation would be to use a 20 -30 deg. angle, but that depends a lot on what you're digging I guess. I assume you're not using an actual hardened cutting edge?