My son was recently gifted a "hole in the water that he can throw money into."
HIs first expense was to buy a used trailer to haul the boat home.
When he backed it into his driveway, one of the four wheels to the trailer FELL OFF!!!
While he worked at pulling the engine's starter, I jacked the trailer and cleaned up the axle.
The inner bearing, was shredded, and non-existant. Therefore I didn't have one to see what the replacement should look like.
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He had bought a replacement hub kit, but it didn't fit.
I went to a tractor supply, and brought the removed hub to get an actual fit bearing set, if they had one.
Well, it seemed that the outer bearing fit, but the inner bearing did not. The inner bearing fit the hub, but not the axle.
Using a vernier caliper, I took dimensions of the axle spindle and tried to find an inner bearing that would fit. I was looking for a bearing that had a tapered inner race.
I wasted a LOT of time. I quit for the day.
A couple of days later, I decided to go to a place that sells trailers, and ask for help in locating a bearing. I asked my son to send me a photo, of the axle, so I could better describe the taper of it. He sent me the above picture.
Upon close examination, and enlargement, I noted that there appeared to be a little seam at the inner aspect of the tapered cone. Sun of a gun. With some additional WD40, a prying screwdriver, and a little coaxing with a hammer, and the inner race slid off.
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I was delighted when I made that discovery, and successfully installed the bearing, and the wheel.
I was disappointed though, that I wasted so much time, because I didn't know what I was doing.
I guess I learned that when things just don't make sense, there is probably a reason why.
I think my next step would be to remove another wheel and hub, to see what the replacement bearing should look like, and take measurements and pictures of it. I would have discovered the problem pretty quickly.