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Originally Posted by BlackCoupe Porter Cable makes Random Orbital and Rotary. |
Having said that, the Porter Cable Random Orbital is also referred to as "Dual Action" or "DA". To add to the confusion, Porter Cable has E-Mailed me the following:
"RE: Porter Cable 7424 This is not a Dual Action Polisher; it is a Random Orbit Polisher."
"Dual Action Polishers are typically air powered and does oscillate and rotate. The Random Orbit Polisher does oscillate and rotate but is subjected to harmonics generated by electricity flowing thru the motor which in turn can cause the pad to rotate in either direction and sometime momentarily stop movement altogether. Thus the term "random orbit". This technology was first developed for sanders to be used in cabinet shops for their aggressiveness, lesser expense to operate and their inability to leak oil on the wood (as air sanders do), and later discovered it worked well as a polisher as you well know."