Blu Ox tow bar

A new tow bar this one is past its useful life

Are you saying it's hard to slide in and out of the receiver? This is fairly common. Wire brush the part that goes into the receiver.. Get rid of any rust or dirt. Then wire brush the receiver.

Though I had no luck finding it online I do recall...long time ago.. Finding wire brushes with square heads designed to brush out a 2" receiver...
Then oil it.

Thank you for your comments. Very helpful....safe travels.

My Blue Ox tow bar never leaves the receiver there is no hitch ball involved. I just store it in the folded position and it stays put. So I don't understand your predicament either?

The prior owners of our class A through in a 10K# Blue OX tow bar that is similar in age to yours, it was pretty stiff but when we drove back home after purchasing rig I was able to clean and lube. Functions quite well for it's age, maybe one day I will replace it but attaching/detaching toad takes but a couple of minutes, we leave Blue Ox locked in rig's hitch.