It could have been an air weep hole for when they secured the blank. The tolerances are tight, and any air back pressure would try to force something back off.
I would thing that any grease would work. I used wheel bearing grease. When I took mine apart I seen they had used grease in there from the factory.
How are you coming along?
Not sure what they do. Just clean everything real good. Try to get as much oil as possible in the top bearing. Fill the felt pad with oil and drop some around the spindle and let it soak while you are working on the back. Add more as needed.
That is strange that they made different version of that motor.
. Mine doesn't have a mfg ID plate on it, so it might not even be a General Industries product.
The inside of yours is way different than mine. Should run quieter and cooler now that you have some oil in it.:thmbsp:
COOL! What size is your Plinth?
Thanks! That's a big one.
I love it when a plan comes together!