The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Proper way to spot weld with a MIG welder

bondobob · 09-07-2006, 07:58 AM

I find you can turn up the heat more than recommended for a given material thickness because you are welding on to solid metal on the lower piece and you are only "there" for a few seconds. I like 5/16" to 3/8" holes to weld thru because with small holes the arc tends to jump to the upper piece and not get a good bond to the lower piece. Get the arc started in the center and do a little swirl around the hole and you are done.

09-07-2006, 07:58 AM	#5
bondobob Registered User Join Date: Feb 2005 Location: Deep River, Ct Posts: 135	Re: Proper way to spot weld with a MIG welder I find you can turn up the heat more than recommended for a given material thickness because you are welding on to solid metal on the lower piece and you are only "there" for a few seconds. I like 5/16" to 3/8" holes to weld thru because with small holes the arc tends to jump to the upper piece and not get a good bond to the lower piece. Get the arc started in the center and do a little swirl around the hole and you are done.