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I recently purchased and disassembled a Hobart KitchenAid K45SS mixer, replaced a broken bevel pinion & center gear, painted the exterior, added new grease and put it back together. I am noticing a wobble in the planetary and would like to know if this is normal? I have a video of the planetary in action on YouTube at: K45SS Planetary wobble

The wobble is not normal. Take a look at the Service Manual to see in the planetary is installed properly. Also make sure that there is no play in the shaft to which the planetary attaches. http://www.kitchenaidparts.eu/documents/