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Electric Pete: The drum is 29.5" long, 6.625" diameter witha thickness of .3125". The ears have run on a diameter of 9.425" . For 8 rotors I have center spacing between ears at 3.266", and for 9 ears I have the center distances at 2.858". It is all mounted to a 1 15/16" dia shaft. The rpm is...

diakin~ While this technique will give you static balanced rotor (Center of gravity at center) It is not enough to be dynamically balanced. If something is statically balanced it is not therefore also dynamically balanced. If something is dynamically balanced it is therefore also statically...

jgKRI~ Thanks for the reply. When you say center plane, is this what you mean? would that mean that having an odd number of eccentric weights make it so you cant get a theoretical balance?

I am trying to design a balanced drum with equally weighted/spaced ears to spin at 1450RPM . I just started learning about dynamic balancing so my grasp of it isn't completely solid. I originally designed this machine so the drum had its static center of gravity at 0,0 thinking this would be a...