While researching the Orchid Book on the Flex-shaft, I was given a
sample of FX wheels to try out. They polished pretty well, but they
had two problems. One being the “glue” which adhered the FX wheel to
a permanently mounted mandrel kept failing, making mass production
difficult. The other was the amount of debris that flew away, meant
that in small quantities, you would be burning through quite a few.
I found that using them in a flex shaft, the heat generated from the
friction in final polishing made it difficult to hold. Upon
searching for the MX polishing wheel at Rio, this looks the same.
Could be a 3M product that was sold or an OEM. Don’t know for sure.
The FX wheels as a flex shaft product are in the book, and I believe
they had intended to sell them, but were discontinued.
Hmmm, maybe I can sell mine on Ebay. LOL