Brand name is Wilton, but it looks to be the same design as all the others: 3 bolts that thread into the back of the disc and hold it to a hub that attaches to the motor shaft. The center of the disc has a hole that looks to have a precision fit around a ~1" disc, I assume to attain perfect concentricity.
I took off the 3 bolts from the back of the disc, but the disc did not freely come off. Is there something press-fitted on? I only ask because I would rather avoid the attempt with a deadblow if there is something pressed on. I did not attempt to remove the small center disc.
FWIW, I am looking to shim the disc away from the hub roughly .001 in one spot.
thanks,
DW