Rolling Knife Sharpener

Fully printable rolling knife sharpener that integrates the designs of two other authors into a seamless tight tolerance package. You must purchase @Cpt Cthulu's suggested bill of materials, which includes:

Materials needed:

• O-ring 58mm AD 50 mm ID 4mm thickness, 2 times
• 6806-2RS bearing, 30x42x7mm, 2 times
• Neodym magnets 5x3 mm, 4 times
• M3 threaded insert, 6 times
• M3 x 10mm countersunk screw, 6 times
• Whetstones / Diamond files from china: 

https://de.aliexpress.com/item/1005005816085556.html?spm=a2g0o.order_list.order_list_main.16.62965c5ffUgxFj&gatewayAdapt=glo2deu

I ordered #240, #400, #1000, and #3000 grit diamond files, those are the standard grits are #240/#1000. I think the complete kit cost me ~$30 on aliexpress and a couple of very simple prints.  Compare that to a HORL at $130+.

I've included my .step files to follow both original designers' intent for sharing.  The Onshape Parts Studio is also available for others to modify if desired.

I tightened up the tolerances on @GrafJM's model for the inner/outer roller, extended the length.

I added smaller magnets to @Cpt Cthulu's model to help retain the Chinese sharpening stones and removed the center threaded insert.

I've included my .step files to follow both original designers' intent for sharing.