In article
,
harry k wrote:



Think about it for a minute: All the parts are rotating together.
Right?
All the parts of a wheel rotate together. Right? So just what is
prepsterous about it?



Let's say there's 4 repeating features on the screwdriver bit (the
square sides), 3 chuck fingers, and 10 grooves around the outer diameter
of the chuck. The strobe couldn't make them all appear to turn backwards
at the same RPM. Oh, yeah, there's also the threads on the drywall type
screw that are turning backwards.