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Posted: 9/28/2011 8:01:16 AM EDT
I'm new to plasma cutting, only done MIG welding. I am looking at a cutter rated to 1/2" steel. With plasma cutters, can I make multiple passes to cut through, say, 3/4" steel, or is the 1/2" a max, and multiple passes won't cut any more? Thanks!
Link Posted: 9/28/2011 8:03:52 AM EDT
[#1]
I suppose you could, but it'd be ugly & messy, not to mention hard on the consumables.  You'd basically end up having to make multiple passes to make a 'v' then cut through the bottom of that.  Not really recommended.  Which cutter are you looking at?  Is the 1/2" a cut or sever rating?
Link Posted: 9/28/2011 8:04:46 AM EDT
[#2]
No way to get oxy/acetylene torch?
Link Posted: 9/28/2011 8:06:49 AM EDT
[#3]

I suppose you could scarf away material to cut something thicker than the maximum, but it would be a mess.

Proper amps and slow down for the thicker stuff.
Link Posted: 9/28/2011 8:07:16 AM EDT
[#4]
What cutter are you looking at?
Link Posted: 9/28/2011 8:07:20 AM EDT
[#5]
You get what you pay for in a plasma cutter.  Get a Miller Spectrum 625 or better.  It will cut in a single pass.  

I bought mine on Craigs for 1/2 of what a new one goes for.  Yes, you have to be very quick to catch a deal like that, and I camped out for a couple hours waiting for the meet, to insure I got the box.
Link Posted: 9/28/2011 8:14:21 AM EDT
[#6]
Where plasma cutters really shine is cutting 3/8 stock or thinner with great precision and little to no dross. Even if a machine is "rated" for 1/2 or thicker, those kinds of jobs are usually better left to a oxy/acetylene and if precision is needed, then a bandsaw.
Link Posted: 9/28/2011 8:17:32 AM EDT
[#7]



Quoted:


Where plasma cutters really shine is cutting 3/8 stock or thinner with great precision and little to no dross. Even if a machine is "rated" for 1/2 or thicker, those kinds of jobs are usually better left to a oxy/acetylene and if precision is needed, then a bandsaw.



Good advice.
 
Link Posted: 9/28/2011 8:22:27 AM EDT
[#8]
Quoted:
Where plasma cutters really shine is cutting 3/8 stock or thinner with great precision and little to no dross. Even if a machine is "rated" for 1/2 or thicker, those kinds of jobs are usually better left to a oxy/acetylene and if precision is needed, then a bandsaw.


I was going to say something similar to this.
Link Posted: 9/29/2011 3:47:43 PM EDT
[#9]
Quoted:
You get what you pay for in a plasma cutter.  Get a Miller Spectrum 625 or better.  It will cut in a single pass.  

I bought mine on Craigs for 1/2 of what a new one goes for.  Yes, you have to be very quick to catch a deal like that, and I camped out for a couple hours waiting for the meet, to insure I got the box.


Millers are definately nice machines, even nicer if you can find a deal on one. I have a Thermal Dynamics that does a nice job.
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