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I have 2 rough-running, four-point, orbital, oscillating buffers that need to run smooth again. Answered

These are heavy duty, 2-handled, 2 Amp, 3240 rpm, four-point, orbital, oscillators that were converted to professional massagers. Both of them now run really rough and I can't keep buying new ones nor can I afford to ship them back to the company for refurbishing. I assume they only need lubrication, but I can't figure out how to open them up nor does there appear to be any one around here who repairs power tools. (Rock and a hard place, eh?) Can anyone help? I have a photo, although those two black knobs do not exist on my units.


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To remove pop rivets, use a drill bit that's smaller than the rivet head to drill into the rivet until the core comes out, then use pliers to extract the rivet from the hole. If you have a replacement rivet to compare to, use a drill bit that's just a hair smaller than the shank of the replacement rivet.
Do not use a grinder to remove the rivet heads instead if there is any plastic near the rivets, as they will get hot enough to melt through the plastic and ruin the rivet holes. I know this from regrettable personal experience.

Thanks ... I missed that reply button. Redid it.

Also thanks for the specific info on rivet removal. Haven't worked with rivets before. Fortunately, this thing is heavy gauge steel as it gets hot during use and would melt plastic all by its self.

Rough? Metal-scraping against metal rough, or not very-smooth motion rough?
You might be right, or there may be some flexible bushing in there that needs replacing.
I see pop-rivets on that, pop-rivets can be drilled-out and replaced (e.g. with more pop-rivets).
If you can't use 'em - take one apart and see what you find.


 No metal scraping, but loud and very rough motion.

I'm thinking there's some rubber (natural or synthetic) that used to damp out the roughness, and it's worn / cracked. I saw this on an orbital shaker once.
Get it in bits, it could be an easy fix.