I'm looking for an alternative to brackets actually made for punch bags as those available to me are very expensive. I need a bracket capable of holding a ~35kg/77lb punch bag that would be swinging around. Ideally a part of it would stick out giving the bag some space.
I'm struggling to think of what these brackets might be called so I can find a way to search for shops who sell them etc.
If it has no mounting holes, I could drill one, so that doesn't matter too much.
Best Answer
If it really must be attached to the wall, I would go with heavy-duty shelf brackets, like these:
The 16"x18" version like this one at Home Depot is rated for 600 lbs each.
I would use two, anchoring each to a stud with lag bolts. I would then bridge between them with 3/4" plywood, and probably a 2x4 on top of the plywood at the point you want to attach the heavy bag.
Using two plus the plywood platform would keep the brackets from racking as the bag swings.