54mm Motor Mount Centering Ring Jig

This jig clamps around a 54mm motor mount to ensure that the centering rings are perpendicular to the motor mount tube. Bolt the two parts of the jig around the motor mount tube check that the jig is perpendicular to the motor mount then apply epoxy to the tube and slide the centering ring down to the jig. I use clothes ping to hold the centering ring to the jig until the epoxy sets, then I remove the jig.