Quote Originally Posted by Eaglewood View Post
I carefully calculated the difference in masses and sized the flanges accordingly. I made a 3D model in Fusion 360 and found that the cg was almost perfectly on center radially. It was off .002-.003. Off coarse machining tolerance weighs in but I just balanced a 7x1 recessed wheel that was way out of balance and it runs fine.
I found that if I put the wheel on the balance fixture without the weights and mark the heavy point then add the weights perpendicular to that cl it is easier to rotate the weight mass away from the heavy side.
That had to take some time to machine them from stock, then cut away the half flange material from each and verify/calibrate the material removed from each produced static balance. The commercial hubs are very pricey that have the 3 movable weights in them. So this drives the DIY solution of making something that works. I did see a solution where a dynamic set of ball bearings were placed between two disks with a groove machined for the balls so they would dynamically balance when it was spun up. But that needed much more hub length for the thickness of the disks.