Does it have a notch on it that a drill can catch on? Or is it just a round shaft?
My barley crusher has this and I don't even use the chuck to tighten it down.
I'd say long term is anything beyond a standard primary fermentation. A few weeks or a month.
My sours go for well over a year. I'm not saying you can't do a sour in bucket, but it's going to pick up more oxygen than a lower permeability fermenter. Maybe you want that. For a Flanders, you'd...
I think buckets are great if they are replaced semi-regularly. Easy to carry, easy to clean.
I would think twice about long term storage in a plastic bucket. There is some oxygen permeability. I'm not a big believer in secondaries though, so this doesn't bother me.
I do use glass when I...