This is from Lucien. Sounds like the collar should stay, although I don't think this idea would work with respect to the prop adapter and spinner backplate. If I don't dream up something creative it looks like I'll be cutting in the AM.
Joe,
The silver collar is what holds the motor together. If you mount the motor
with the mounting face forward, the pull from the prop will hold the motor
together without the collar, but any time you go to idle, and the prop
starts to drag, it will push the motor back in a little bit. It will only
go a small amount before the attractive force of the magnets prevents it
from going any further, but it will go back and forth a bit. This can
hammer on the bearings a bit, and is not recommended.
What you can do is cut a spacer out of tubing that has an 8mm ID and a 9mm
OD that is just a hair longer than the thickness of your front mounting
plate, and slide that onto the shaft and then put the collar back on. Going
this way, you only need a hole that is about 9.5mm in diameter instead of a
16 or 17mm hole to fit the collar through.
How does that sound to you?
Lucien Miller
Innov8tive Designs, Inc.
1495 Poinsettia Avenue, Suite 144
Vista, CA 92081
Phone: 760-468-8838
Fax: 760-305-7749