Some weldors only use Oxy/Acet to weld with. I've used it on steel, aluminum, brasses and bronze as well as silver soldering and brazing. If I had only one process available to use Oxy/Acet would be my choice as you can cut, braze, heat and weld with it. It is the process of choice for artists and craftspeople.
Be very careful with that set oxyacetylene tanks. I'm getting ready to do some oxyacetylene welding.
Oxyacetylene welding can be used for welding most common metals, including carbon steel, stainless steel, aluminum, copper, and brass. However, it is typically not suitable for welding reactive metals like titanium or zirconium.
the left hand thread is for acetylene use only
mixture of oxygen and acetylene (oxyacetylene)
The best fix would be to weld it yes. To do a proper weld on aluminum you are going to want to only use a TIG welder. You can also have decent results with industrial J-B Weld. The area would need to be properly prepped and cleaned though for best results.
I would use epoxy, J B Weld or Araldite.
Yes, brass can be welded using various methods such as oxyacetylene welding, TIG welding, and brazing. The specific welding technique used will depend on the thickness of the brass and the desired strength of the weld.
Fire
Yes, you can weld steel to steel. You can use steel welding rod.
When welding something like gears, you need a rod that gives good penetration, and also has a fairly high density. I would probably use 6011 rods. These are the best for any "out of position" weld. Just be sure it's a close weld. Otherwise you'll get a lot of spatter (which you would then need to grind off).
Oxyacetylene flames can reach temperatures up to 6,332°F (3,500°C) when burned with the optimal ratio of oxygen and acetylene.
weld up planet gears more you weld the better just to stop them from turning,dont recommend for road use though!!!