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Posted by Maxwell on May 3, 2008, 3:37 pm
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I have a Millermatic 35 I use for general purpose welding on mild steel
usually 1/4 and less thick. Since buying it 30+ years ago, I have always
used .035, ER70S-6, and CO2 gas. I tried some Argon mixes years ago, but
IIRC, I didn't get enough penetration to suit me. I have never been real
happy with it's penetration qualities, but it's so much faster than stick.
The machine has never seemed quite smooth enough either. No matter where I
set the wire speed, it still seems a bit lacking.
Obviously things have changed a good bit over the years, and I'm revisiting
my choice of wire and gas. So I thought I would check the consensus of the
group.
Current recommendations friends and suppliers have been:
CO2 gas with ER70S-6 wire, but go with the .030 as opposed to .035.
CO2 or 25/75 gas with E71T-1M, or E71T-E7, .030.
No gas and E71T-GS, .030.
Would welcome any and all suggestions. All position would be nice, but I
need at least vertical down. Good penetration on hot rolled steel (without
pregrinding) would be a must.
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Posted by Ernie Leimkuhler on May 4, 2008, 3:00 pm
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> I have a Millermatic 35 I use for general purpose welding on mild steel
> usually 1/4 and less thick. Since buying it 30+ years ago, I have always
> used .035, ER70S-6, and CO2 gas. I tried some Argon mixes years ago, but
> IIRC, I didn't get enough penetration to suit me. I have never been real
> happy with it's penetration qualities, but it's so much faster than stick.
> The machine has never seemed quite smooth enough either. No matter where I
> set the wire speed, it still seems a bit lacking.
>
> Obviously things have changed a good bit over the years, and I'm revisiting
> my choice of wire and gas. So I thought I would check the consensus of the
> group.
>
> Current recommendations friends and suppliers have been:
>
> CO2 gas with ER70S-6 wire, but go with the .030 as opposed to .035.
>
> CO2 or 25/75 gas with E71T-1M, or E71T-E7, .030.
>
> No gas and E71T-GS, .030.
>
> Would welcome any and all suggestions. All position would be nice, but I
> need at least vertical down. Good penetration on hot rolled steel (without
> pregrinding) would be a must.
>
>
>
A Miller 35 is a great old machine.
I am surprised you say you can get penetration, since if you run that
machine balls-to-the-wall you can switch into spray mode (using C25
gas) and weld 1" plate.
I recommend using 0.035" ER70S-6, and C25 gas (75% Argon, 25% CO2) for
light gauge work (1/4" and below)
For heavier plate move up to 0.035" ER71T-1 (gas shielded flux core)
with a C25 gas shield.
For really big stuff over 1/2" thick, move up to 0.045" ER71T-1 with
the C25.
For work outdoors go to 0.035" or 0.045" ER71T-8 (self shielded flux
core)
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Posted by Maxwell on May 5, 2008, 5:41 pm
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>
> A Miller 35 is a great old machine.
> I am surprised you say you can get penetration, since if you run that
> machine balls-to-the-wall you can switch into spray mode (using C25
> gas) and weld 1" plate.
Well, like I said, I haven't experimented much with it. Just CO2, and the
.035, ER70S-6. I think the mix I tried before was either 25% Argon or 50/50,
and running this wire with CO2 only, and balls out to get the penetration,
you get some pretty big dill berries. I'll get a bottle of C25 this week for
sure. It sounds like gas alone might cure 90% of what's ailing me.
-----
> I recommend using 0.035" ER70S-6, and C25 gas (75% Argon, 25% CO2) for
> light gauge work (1/4" and below)
> For heavier plate move up to 0.035" ER71T-1 (gas shielded flux core)
> with a C25 gas shield.
>
> For really big stuff over 1/2" thick, move up to 0.045" ER71T-1 with
> the C25.
I would have never thought of anything bigger than 035 on a MM35, but will
keep it in mind. Can't imagine ever need to weld enough thick material to
justify a roll of it though. But I will try the 035 for sure.
-----
>
> For work outdoors go to 0.035" or 0.045" ER71T-8 (self shielded flux
> core)
I'm assuming gasless here. How is this for vertical up, or a wide gap? Would
another wire be better for all position?
-----
What would you recommend for welding the thinnest possible sheet metal with
this machine?
-----
Have you ever used E71T-E7 or 1M?
--------------
Thanks for taking the time Ernie, I really appreciate it.
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Posted by Ernie Leimkuhler on May 5, 2008, 8:34 pm
Please log in for more thread options
>
> -----
>
> >
> > For work outdoors go to 0.035" or 0.045" ER71T-8 (self shielded flux
> > core)
>
> I'm assuming gasless here. How is this for vertical up, or a wide gap? Would
> another wire be better for all position?
>
Jumping gaps is a balance of voltage to wire speed to travel speed.
If you do a classic triangle weave with gasless flux-core you can climb
fast and jump a moderate gap.
E71T-8 is all position, E70T-8 is flat only
> -----
>
>
> What would you recommend for welding the thinnest possible sheet metal with
> this machine?
0.030" is the thinest wire I would run in that machine, mainly due to
the gun and it's liner.
If you want to run 0.024" wire you would have to get a smaller gun
liner.
> -----
> Have you ever used E71T-E7 or 1M?
>
> --------------
>
E71T-1M is a lincoln wire and I HATE it.
My favorite flux-ciore wires are made by ESAB, Dual-Shield and
Core-shield 8.
> Thanks for taking the time Ernie, I really appreciate it.
>
>
>
>
>
>
>
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Posted by Grant Erwin on May 5, 2008, 10:01 pm
Please log in for more thread options Ernie Leimkuhler wrote:
>
>
>>
>
>
>>-----
>>
>>
>>>For work outdoors go to 0.035" or 0.045" ER71T-8 (self shielded flux
>>>core)
>>
>>I'm assuming gasless here. How is this for vertical up, or a wide gap? Would
>>another wire be better for all position?
>>
>
>
> Jumping gaps is a balance of voltage to wire speed to travel speed.
> If you do a classic triangle weave with gasless flux-core you can climb
> fast and jump a moderate gap.
>
>
> E71T-8 is all position, E70T-8 is flat only
>
>
>>-----
>>
>>
>>What would you recommend for welding the thinnest possible sheet metal with
>>this machine?
>
>
> 0.030" is the thinest wire I would run in that machine, mainly due to
> the gun and it's liner.
> If you want to run 0.024" wire you would have to get a smaller gun
> liner.
>
>
>
>>-----
>>Have you ever used E71T-E7 or 1M?
>>
>>--------------
>>
>
>
> E71T-1M is a lincoln wire and I HATE it.
>
> My favorite flux-ciore wires are made by ESAB, Dual-Shield and
> Core-shield 8.
Coreshield 8, however, is not made in sizes smaller than 1/16".
http://tinyurl.com/4b9ab3
Some of the dualshield stuff comes as small as .045". Most of the ESAB
wire, though, seems made for bigger machines.
Grant
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> usually 1/4 and less thick. Since buying it 30+ years ago, I have always
> used .035, ER70S-6, and CO2 gas. I tried some Argon mixes years ago, but
> IIRC, I didn't get enough penetration to suit me. I have never been real
> happy with it's penetration qualities, but it's so much faster than stick.
> The machine has never seemed quite smooth enough either. No matter where I
> set the wire speed, it still seems a bit lacking.
>
> Obviously things have changed a good bit over the years, and I'm revisiting
> my choice of wire and gas. So I thought I would check the consensus of the
> group.
>
> Current recommendations friends and suppliers have been:
>
> CO2 gas with ER70S-6 wire, but go with the .030 as opposed to .035.
>
> CO2 or 25/75 gas with E71T-1M, or E71T-E7, .030.
>
> No gas and E71T-GS, .030.
>
> Would welcome any and all suggestions. All position would be nice, but I
> need at least vertical down. Good penetration on hot rolled steel (without
> pregrinding) would be a must.
>
>
>