This knife sharpener uses sharpening stones found on aliexpress: https://fr.aliexpress.com/item/1005005751348299.html?spm=a2g0o.order_list.order_list_main.65.4ed05e5bZt4W5K&gatewayAdapt=glo2fra

The sharpening stones are maintained by magnets on the structure. The cylinder inside parts are rotating using 2 ball gears Two large o-rings are used to surround the top and bottom parts are Whole structure is maintained by a M6x85 screw and nut.

To make it you need to print 4 parts:

• the top side
• the bottom side
• the body
• the knife support

You will need following parts:

• 14 M3 x 13 screws to hold the magnets (https://fr.aliexpress.com/item/1005004334268362.html?spm=a2g0o.productlist.main.109.6a2f18441wDrRZ&algo_pvid=39d3f0a9-1a89-4104-b52c-ab227817c80c&aem_p4p_detail=2023072301414216854841563108160005288478&algo_exp_id=39d3f0a9-1a89-4104-b52c-ab227817c80c-54&pdp_npi=3%40dis%21EUR%211.11%211.0%21%21%211.21%21%21%40214527c616901017029282954d0786%2112000028797286018%21sea%21FR%21751660186&curPageLogUid=pHvWk6iiuH8t&search_p4p_id=2023072301414216854841563108160005288478_11)
• 14 10x3 magnets (https://www.aliexpress.com/item/1005003451007095.html?spm=a2g0o.order_list.order_list_main.5.4caf5e5bOrd9EV)
• 1 M6 nut
• 1 M6x85 screw (https://www.aliexpress.com/item/1005002984716211.html?spm=a2g0o.order_list.order_list_main.21.4caf5e5bOrd9EV)
• 2 6807 35x47x7mm ball gears (https://fr.aliexpress.com/item/1005002540505771.html?spm=a2g0o.order_list.order_list_main.10.4caf5e5bOrd9EV&gatewayAdapt=glo2fra)
• 2 o-rings A x5 3p5mmx55mmx62mm (https://fr.aliexpress.com/item/32803904583.html?spm=a2g0o.order_list.order_list_main.52.21ef5e5bGpFPEz&gatewayAdapt=glo2fra)

Edit August 29th 2023:

• Updated STL files to fix mounting space on ball gears
• Enlarged main screw hole to make it easier to mount
• Added double side sharpener
• Added 5 side base with 12, 15, 18, 20 and 22°
• Enlarged magnet holes on the base

Edit October 1st 2023:

• Added flexible patch on each side to make sharpening stone mounting smoother