09-05-2012, 09:54 AM
It's my understanding that the cimex units that have a model # R38 or R48 are older units, they have the same rpm as the newer units. I do not know when the year model numbers changed. I know this because I have owned 2 older R48 models and they were manufactured in the 1980's.
I hope this helps!
I hope this helps!

