spot welder welding machine

[marc.collin]

hi

somebody have experience with spot welder welding machine?

i saw some on alibaba less then 200$

like
http://www.aliexpress.com/item/Hand...ne-repair-Laptop-Mobile-phone/1364762797.html

or
http://www.aliexpress.com/item/Spot...ni-notebook-hand-touch-welder/1911840430.html

 

[more_vampires]

The link for the first one says it can only weld ".2 mm" max thickness. That works out to almost 34 gauge sheet metal. Doesn't sound like much of a welder.
The second looks about the same. Neither link really gives much detail.

What projects do you want to do with this welder?

http://www.amazon.com/dp/B0000CBIKA/?tag=cpf0b6-20
This one claims over 16 gauge (about 1.52mm.) $330. Looks a whole lot more versatile.

By the way, some people refer to these kinds of welders as "cracker box" welders.

 

[alpg88]

well it is in battery section, so i assume he needs it to weld tabs to cells, normally tabs are 0.1-0.2mm so first one is enough.

the one that is for 1,52mm is way too much of an overkill, it needs special 30A outlet, while other will work fine with household 15a outlet.

 

[NoNotAgain]

Don't know what you plan on welding with the spot welder, but I build AK's using a Harbor Freight 120 volt model. Spot welding in the rails and ejector and the .040" thick shell only take 10 seconds. I had to do a lot of experimentation to reduce the power or the weld times were under one second.

I ended up using a 50' 12 gauge extension cord to reduce the power the welder saw. The welder uses close to 17 amps @ 120 volts.

If you are planning on spot welding battery tabs, you don't need much power.

 

[marc.collin]

Don't know what you plan on welding with the spot welder, but I build AK's using a Harbor Freight 120 volt model. Spot welding in the rails and ejector and the .040" thick shell only take 10 seconds. I had to do a lot of experimentation to reduce the power or the weld times were under one second.

I ended up using a 50' 12 gauge extension cord to reduce the power the welder saw. The welder uses close to 17 amps @ 120 volts.

If you are planning on spot welding battery tabs, you don't need much power.

only want to use it to spot wedling battery tabs (18650).

do you have a photo of your setup?

you have this one: http://www.harborfreight.com/welding/arc-welders/70-amp-ac-120-volt-stick-welder-60768.html

 

[NoNotAgain]

only want to use it to spot welding battery tabs (18650).

do you have a photo of your setup?

you have this one: http://www.harborfreight.com/welding/arc-welders/70-amp-ac-120-volt-stick-welder-60768.html

No, I have this model http://www.harborfreight.com/120-volt-spot-welder-61205.html . I replaced the lower tong with a piece of high conductivity copper http://www.mcmaster.com/#standard-red-metal-rods/=w305wi and installed Miller screw in spot welder tips http://store.cyberweld.com/mispwetista.html .

For what you are doing, check with some of the used equipment sellers. I had the perfect set up at work that they would not give to me when I retired. Instead they threw it away. Makes perfect sense to me.

 

[marc.collin]

for 18650 battery,

0.1mm thickness is ok?

or is better 0.15mm?