Make A Retractable Caster For Metal Bench

[Saltfever]

edit . . . Just not with the fitments shown in this video. If everything was tight and close fitting sure TIG with no filler rod.

Go to 4:51 and SLOW down your viewing speed to 25%. Look carefully at his Left hand. He is steadying his torch hand with it and NOT holding any filler rod. Yet, he is running a continuous bead. It requires some skill but is quite easily done. You concentrate your heat on the thicker (upper) metal and let it flow and fuse to the thinner lower metal. Zinc, as mentioned, complicates (or contaminates) the weld and usually results in poor quality or cosmetics. However, the weld is on the underside facing the floor and will never be seen. I doubt he cares about the looks if he can stay out of the hospital!