New Topic: So after some discussion, it seems like the best solution for my original question about welding casters to some black iron pipe would be to weld some plates to the pipes then mount the casters to those plates. The conversation now is how to best prepare the black iron pipe itself for welding.
Any and all suggestions are welcome!
Thanks!
Archived Question - already answered
Original Post: I took a MIG welding class a few months ago and thought I could apply it to an upcoming project.
Iām building a desk and was going to use black iron pipe as the legs, would I be able to safely weld some of these casters to the black iron pipe?
Iām still very unsure of what metals I can āsafelyā weldā¦
The specs donāt say if itās galvanized or not (usually these are), if it is, donāt weld it.
Iād suggest that youāll probably have better results (and be able to replace the wheels in the future if you need to) by welding a small piece of plate to your pipe, then bolting the casters to the plate.
Only thing to mention is that the steel must be shiny/clean within an inch or so of the weld. You donāt want to weld over the black coating on the pipe.
Finding a caster that isnāt galvanized is going to be your problem.
Sorta. Welding in itself does but off some gases. Itās best to clean the black coating off the pipe before welding. A wire wheel or flap disc will take that off. As long as you are not welding galvanized pipe, its ok.
Edit Iād also second Brads suggestion of making a plate for the casters to bolt to.
From the research Iāve done, it looks like some acetone and elbow grease can get the black coating off as well, is that correct?
I was going to have to do that anyway, I wanted to spray paint the final hardware a different color.
And once youāve done so, flash rust is a distinct possibility. Be prepared to prime immediately once stripped to bare metal. Like within 10 minutes in Dallas summer humidity.
Consider just roughing up the varnish with 220 grit sandpaper, cleaning, and priming/painting over.
I hate being the voice of reason but why not drill a piece of plate to bolt the casters to? then weld the plate to the end of the pipe? If a caster fails it can be replaced. I am pretty sure the surface you want to weld to is a surface for the castor bearings and getting them hot or distorted with a weld could very possibly result in premature failure of the bearing. Lots of casters have bearings with nylon cages holding them in place. Just thought I would throw that out there.
I am sorry, I admit that I did not read all 13 posts, they all seemed to be heading down the same trail. You have restored my faith in humanity. If I go back and read all 13 will I find a reason why this idea was dismissed?
Your post does not appear on my screen was it a PM to the OP?? I just realized you are talking about buffing the black off the black iron?? I have always understood the black to be Iron oxide and would not wash off with acetone or any other solvent but I could have been misinformed. I have welded black iron a few times and have never experienced and off gassing even with MIG
The issue moved from āwelding the caster to the black pipeā to āwelding a plate to the black pipeā but the other issues (re: pipe coatings) didnāt change, so then conversation topic didnāt really change either.
