I use Milton A-style on my tools as they are push to connect. Not sure about air flow on these, but have had no problems with 1/2 “ impact and lug nuts. I use a Stedlin on the compressor just for noise Control. Being older with some hearing damage makes it very pleasant to unhook a longer...
I use one of these quite a bit. Find one that fits your hand well. I have to have the striking cap on the handle as I use it to remove a lot of trim. Mine is a Goldblatt I bought from the flooring store.
I have done a few pool motor bearings, but have not seen a collar like that. If it is a pressed on spacer may be able to pull it with the bearing. Could put the puller on and heat it to see if it moves. Can you find that part on a parts list, see if it is a threaded part or shaft. Just...