Posted by Texasmark1 on August 05, 2013 at 21:15:53 from (172.242.15.27):
In Reply to: OT Mig welder posted by pat sublett on August 05, 2013 at 16:54:46:
20 is a good number per my instructions. I just went through just what's in and out of the bottle and if interested here it is.
I have a #4 tank from TSC (the 48 x 6 1/2 approx bottle), great way to buy gas as it's available, price is $50 for the refill, they sweat the periodic safety check and all. I called the company that supplies the bottles to TSC and they fill the bottles to 2000 psig.
In the #4 tank this gives you 125 cu ft of gas. The smaller of the two gauges and the regulator set the flow rate of gas out of the bottle, not pressure like in acetylene and oxygen.
The flow rate is in cubic feet per HOUR. The MIG tip is supposed to (mine does and it's a Harbor Freight 151) to turn the flow on and off as you depress the trigger.
Therefore with the flow set to 20 you get 125/20 (6 1/4) hours of usage out of the tank for the $50. That's 8 bucks an hour for welding gas and to me that's a deal.
Oh, while on the subject, I had an aluminum welding job I thought I'd try. In short, the .030 alum wire is very brittle as compared to the steel and much harder to keep fed in the standard welder.
I think (opinion) the spool handle gadget where the spool is in your hand, not down the pipe in the welder would work much better even though you may get tired of holding it. I didn't have one so I got some alum sticks for my stick welder to do the job which got-r-done whereas the alum MIG was a waste of time and money......course I am a farm welder, not a registered professional with experience. Big difference in me and the equipment.
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