The Stovebolt Site Forums The Shop Area Paint and Body Shop Combination Punch & Flange Tool - What size ?

I was looking at the Website for HTP 3/16" and 5/16" size Combination Punch & Flange Tool they have. What should be good for me to restore my 52 with Hobart 140 MIG welder.

Any advise is appreciated..

Rgds.,
Ganesh

Either will work. The larger punch just gives more edge to weld and results in slightly more strength to the welded joint.

5/16 OR 8MM.I WOULD GET A PISTOL STYLE ITS EASIER TO SEE WORK AND GET IN TIGHT AREAS IF NEEDED.

Thanks guys, we have two different opinions and I am confused now. For 18 gauage steel, If I use MIG welder trying to fill-in 3/16" hole, will it weld through the bottom sheet metal or it can still hold up till I complete filling up the hole.

Ganesh

Ganesh,

No, it won't "burn thru" the base metal if you get going and move around the edge of the hole (assuming good metal and proper welder setting). It's just like doing the edge of a lap joint, just going in a circle.

From your question you have not done this before. Practice is the key to welding. Either size punch will work. Get some scrap metal, drill a dozen holes of both sizes, clamp the sheets together and practice.

Everyone has their own method. I like to strike the arc on the base metal then go out to the hole edge and run around the hole, then pull back in and fill the center if needed. With a little practice you will have a strong bond and flat surface with little grinding to do.

Remember to move your clamps to each hole because any space between the two sheets will allow things to get too hot and burn back the edge.

Paul

Thanks Paul, that helps I am newbie to welding so I will practice before I invest.

Ganesh

I'd go for the smaller punch if I had it to do over. I'm finding the 5/16 won't punch heavier gauges of steel, like my floorboards for instance. I'm using a cheap step drill to prep my new parts.