Ball Bearing Axle for PolyDryer Remixed

When I tried to use the supplied axle with my PolyDryer on a roll of Sunlu ABS with a broken ring, I found the spool wasn't lifted enough to avoid the bottom rollers.

About that time I saw the One-Way Check Valve video from @clough42 and thought his Ball Bearing Axle Shaft for PolyDryer would help me out….  it didn't work exactly but it pointed me in the right direction.

I had the 6904-2RS Ball Bearings already, but if you need to order some, here's an affiliate link - https://amzn.to/488O5rh
* be sure to get the 20mm x 37mm x 9mm size

Currently I have spool hubs for Ovv3d, Qidi, Sunlu and Voxel. I'm happy to add to the CAD, I just need the id of the spool. 

the stls should be uploaded in the best orientation already. No supports needed.

I used a 0.5mm nozzle and 0.25 layer height.  You don't need much infill, just make sure the top and bottom of the hubs are at least 1mm thick.

Happy Printing!

• made the axle easier to print
• add adapters to fit the various spools I use