Welding unit bearing cups?

[Brad]

MIG does not stick them in as well. Even with preheat. I've seen several MIGed in spindle snouts rip out at the weld. I've never seen a TIGed one pull out. Similar to rossets, never MIG those. Put that thing up on stands so you can spin it, lay the propane torch so it's aimed down the tube and let it rip. Even with multiple passes, it goes quick.

You stick or tig rosettes?
Now this isn’t directed at you entirely, just used examples
308 was a waste for welding the inside. Seeing what it looks like from the first pictures it wouldn’t matter what rod he used. Too hot and not enough filler or too much with not enough heat. It’s leaking because there is cold rolled spots and hi/low everywhere. He would have been better off just washing over everything the first time. Pretty welds aren’t always strong or airtight.
Never seeing a tig one pulled out and mig ones have? I’ve seen plenty of the opposite. Process depends entirely on the integrity of the weld and that’s based on the person welding it. Give a squirt gun operator a tig and vise versa. Results may vary.

OP have you checked the flatness of the flange after all the welding and rewelding? You are getting contamination and loss of coverage(which can be caused by contamination burning off and pushing the shielding gas away)somewhere. The orange/black soot is a clear indicator.

 

[bdkw1]

You stick or tig rosettes?
Now this isn’t directed at you entirely, just used examples
308 was a waste for welding the inside. Seeing what it looks like from the first pictures it wouldn’t matter what rod he used. Too hot and not enough filler or too much with not enough heat. It’s leaking because there is cold rolled spots and hi/low everywhere. He would have been better off just washing over everything the first time. Pretty welds aren’t always strong or airtight.
Never seeing a tig one pulled out and mig ones have? I’ve seen plenty of the opposite. Process depends entirely on the integrity of the weld and that’s based on the person welding it. Give a squirt gun operator a tig and vise versa. Results may vary.

OP have you checked the flatness of the flange after all the welding and rewelding? You are getting contamination and loss of coverage(which can be caused by contamination burning off and pushing the shielding gas away)somewhere. The orange/black soot is a clear indicator.

I don't stick anything if I can avoid it. Outdoors is the only time I use stick and I try to avoid that too. I have done plenty of stick, just prefer TIG so things like this.

 

[arse_sidewards]

I don't stick anything if I can avoid it. Outdoors is the only time I use stick and I try to avoid that too. I have done plenty of stick, just prefer TIG so things like this.

Why? I fucking love it. I never pick up the MIG gun unless I'm doing material below 1/8".

 

[cj3a]

Why use 308? It’s clean steel just walk the cup around the outside 1/8 rod at around 100 to 125 amps

 

[YJLOPES]

A buddy of mine forwarded my pics to a welding instructor. I was advised it was most likely a lack of shielding gas that lead to the pinholes. Possibly from a leak in the machine or excessive stick out.

I'll grind it out and try again after I check the machine over for any leaks. It's a brand new MIG, so I haven't had it long enough to break something, but it is entirely possible that a leak existed out of the box. I won't be back to my shop for a week or 2, so this is on pause for now.