Strange results from cleaning pellets

the one i purhased is not that big..i bought a small one that is 7 inches x 4"x 3"deep
if it was too strong for lead, what would it do to vinyl?
Mine is bigger with two inducers. I've cleaned hundreds of LPs without incidence. 6 lps rotating through the bath for 20 minutes. The bath is water, a cap of Kodak photo-flo and 2oz of 99% alcohol.

It seems weird lead is damaged since the same unit can be used to clean gold jewelry. Granted that isn't pure gold, but it never damages gold or other metals.
 
ok..i thought it was one of those after market pieces
Thanks Tim
I considered one until I saw the price tag. I am not sure there is any significant accuracy advantage to them other than enriching the manufacturer? Sorry to drift this thread off topic, with my post, which was added to the WRONG thread. Sorry guys. Just another senior moment. Now back to the original posters' topic...
 
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It seems weird lead is damaged since the same unit can be used to clean gold jewelry. Granted that isn't pure gold, but it never damages gold or other metals.
After some more research I agree with 6gun it appears to be cavitation damage. Cavitation will eat through steel under the right conditions.

The Internet wisdom recommends even higher frequency up to 170kHz, cooler bath temps, and lower cleaning times.

David