Quote:
Originally Posted by neutron256
I did consider making my own washer/spacer but decided it was just as hard as the tiny bit of machining needed on the wheel. Plus doing it on the wheel means one less part.
I agree a set screw couple would be closer to balanced, but I'm worried about how well it will handle the torque. It also has to resist the compressor wheel trying to pull itself forward as it spins which set screws are particularly bad at.
The coupler is heavy on the side opposite the screws so I think the best bet would be to remove some material on that side. Exactly where and how much would be trial and error. Some sort of stick-on balancing weight would be great but I'm not sure it would hold up long at 50K RPM and there isn't that much surface area on the light side to stick them too.
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torque wouldn't be a problem, a single set screw pinion is what typically goes on these motors. However the pulling as you say could be a problem. multiple larger diameter set screws could be a solution.
Also, I see they have couplers like yours but are split on both sides so that there is the gap on both sides. This would be a lot better balanced than the one you have now.
However I'm not finding anything rated for even half of the rpm you need, so you are probably going to be operating out of suggested limits no matter what.