Arc welding off dual batteries...really?

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In the 1st vid the rods on the positive and the you tube vid its on the ground and he talks about that bin important,

Can anyone explain why it's important yet as shown in the 1st it worked the other way,
 
warrior said:
In the 1st vid the rods on the positive and the you tube vid its on the ground and he talks about that bin important,

Can anyone explain why it's important yet as shown in the 1st it worked the other way,
Click to expand...

Electron flow if your using gas or gasless, to concentrate the heat on workpiece or filler.
If you get a ordinary mig on gas and swap polarities it doesnt work properly
 
I read this thread a week or so ago and though that's really useful to know, but never thought I would actually need it.

But yesterday, when out green laning with a few mates this happened to the gear stick on one of the vehicles



We had plenty of batteries between us, plenty of jump leads, but no welding rods!!! But you can be sure we will next time!!!

So after many phone calls, and a slowwww journey (he was stuck in 2nd gear) from one side of Dartmoor to the other, we arrived at an agricultural plant engineers yard where a friend of a friend was waiting to help us out



and he did a proper weld on the gear stick



But if only we had a welding rod (and a pair of welding goggles) with us, it would have saved us a couple of hours!! :rolleyes:
 
DTd5 said:
I read this thread a week or so ago and though that's really useful to know, but never thought I would actually need it.

But yesterday, when out green laning with a few mates this happened to the gear stick on one of the vehicles



We had plenty of batteries between us, plenty of jump leads, but no welding rods!!! But you can be sure we will next time!!!

So after many phone calls, and a slowwww journey (he was stuck in 2nd gear) from one side of Dartmoor to the other, we arrived at an agricultural plant engineers yard where a friend of a friend was waiting to help us out



and he did a proper weld on the gear stick



But if only we had a welding rod (and a pair of welding goggles) with us, it would have saved us a couple of hours!! :rolleyes:
Click to expand...

That seals it then. I'm carrying welding rods at all times. What gear were you stuck in?
 
payydg said:
That seals it then. I'm carrying welding rods at all times. What gear were you stuck in?
Click to expand...

Fortunately it wasn't my vehicle, but a mate who we were laning with. He was stuck in Second Gear.

matchmetisse said:
I think in the case where you have to think of everything a small set of oxyaccetylene would be better, easier to weld with and more useful!
Click to expand...

I think the whole point of the original post was how you could carry out 'emergency repairs' with minimal equipment to get you going again. I don't really think carrying around tanks of gas is the answer in this respect and given that we effectively had everything needed to carry out the repair other than a welding rod and protective goggles goes show just how beneficial carrying a couple of welding rods would have been.

Also bear in mind that we had 4 vehicles including one with a dual battery set up so 5 batteries in total between us (normally though there are 6 of us - so 7 batteries).

So even if we ended up draining 4 batteries whilst carrying out the repair (which is highly unlikely), we could have still kept one vehicle with a fully charged battery to jump start the other 3 vehicles with their flat batteries :D therefore carrying cylinders of gas makes no sense really.

Anyone got any recommendations as to the best rods to carry for this type of emergency repair??
 
Dr_evil said:
Just mild steel isn't it so 6012 or something like that ?
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all depends doc how thick the materials is and tensile strength is needed.

Better choice would be 6011 and 7014 in 3/32 dia rod, 6012 is shallow penetrating rod for sheet metal and those that do not know how to weed. covering a crack is not much good. 100% penetration is a good repair. If a solid material broke, what is a dab of weld going to do
 
Its more likely to be for thicker materials as opposed to sheet metal.

Things like trasmission and suspension I would guess are the most likely things to fail (which could be rewelded) and prevent you carrying on???
 
DTd5 said:
Its more likely to be for thicker materials as opposed to sheet metal.

Things like trasmission and suspension I would guess are the most likely things to fail (which could be rewelded) and prevent you carrying on???
Click to expand...

transmission are either alumiunm or cast iron not much good for either then
 
Thor1950 said:
all depends doc how thick the materials is and tensile strength is needed.

Better choice would be 6011 and 7014 in 3/32 dia rod, 6012 is shallow penetrating rod for sheet metal and those that do not know how to weed. covering a crack is not much good. 100% penetration is a good repair. If a solid material broke, what is a dab of weld going to do
Click to expand...
Wrap the rods in cling film as they absorb moisture and you'll get porous welds. Remember to take the cling film off before use though!
 
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