[EricH]

Originally Posted by excel2474

Specifically, I don't understand this statement in the instuctions "The bore of the Sun Gear of the AM Planetary needs to be reamed to 0.3105-0.3110 for a press fit onto the CIM motor shaft (we do not offer this part) ". Can you help me with this? Thanks alot for the help!

Planetary gears have a ring gear (outside), planet gears, and a sun gear (center). The sun gear must be reamed--that means that you need a reamer and at least a very straight drill press, if not a mill. A drill bit might work, but I'd go with a reamer.

What you're doing is expanding the hole slightly and smoothing it out. Press fit means that you have to push really hard on the gear to get it onto the shaft of the motor.