Oster Blender blade disassembly?

I have an Oster blender that uses the classic Oster blade:

https://cdn3.volusion.com/vukbm.ylfdv/v/vspfiles/photos/OS031014104000-2.jpg\


I mainly use the blender to make smoothies from frozen fruit, so the blade gets some serious stresses as it collides at high speed with frozen chunks, and the blender motor is powerful. Over time, the blade assembly has gotten somewhat wobbly on its shaft and leaks thru the base (enough to make a small mess on the counter). New blade assemblies don't cost that much (8 bucks or so) but I thought I'd take it apart and see if there's a way to get it tightened back up again. Not so easy to do, as it turns out.

It appears to be either press-fit together or perhaps riveted (see top of the assembly in the image). There's a brass collar-ish fitting on the underside that looks like it might unscrew, but I was unable to budge it.

I am hoping that a fix-it guy here will have worked with these particular blades and know if it's possible to take one apart without destroying it, and if so, how to do it.

Thanks.

 

That's not a repairable part, which is why they sell new blade assemblies for $8.

 

Figgers. OK, thanks for the quick reply.

 

They use a brass or bronze sleeve for the bearing and they just wear out.

 

Unless you have a machine shop and time to kill I would consider it a disposable part. When the blades get loose I've touched them with the welder but that's about it. There's nothing the average person can do about the leaking.

 

In this case, the blades aren't loose on the shaft or in relation to each other; the shaft is loose in its housing, and a worn bearing (per Pjmax) could explain it,

 

Yup. I had a Waring blender from the year ought. It had been thru some rough times. It used a bronze bushing as a bearing and it was completely worn out. My mixed drinks were escaping out the bottom.

 

I hope Waring parts are as cheap as Oster parts...

 

that's alcohol abuse! lol!