“GRANCHIO” – Compatible Anti‑Bending Support for WORKSHARP

Project Name: “GRANCHIO” – Version V1 updated 20260501

add V1 files
main differences:
add locking support rear and front, means new base with slots, add locking support for central support, please have a look of red dots on new picture V1

Project Name: “GRANCHIO” – Version V0 This device was designed to address the limitations I encountered when sharpening larger knives on my WORKSHARP Precision Adjust™ Knife Sharpener—the black, fully plastic version commonly found on eBay for around 70 euros. I am aware that a Zamak version of the device exists and may have solved some of these issues, but it belongs to a completely different price range.

To overcome these shortcomings, I created a new base featuring two side “ears” and two adjustable brackets. These brackets allow two small height‑adjustable supports to slide into position. Together with the central support, they prevent the blade from bending during sharpening, keeping the entire structure rigid and ensuring that the sharpening angle remains consistent and unaffected by blade flex.

Please note that the tightening knobs on the arms contain embedded M5 nuts, and the two adjustable columns also require embedded M5 nuts. You will need to use the pause at height function in your slicer to insert the nuts during printing.

Since most knives are tapered, I could have added a joint mechanism, but I preferred to keep the design simple. For this reason, I printed two small TPU hemispherical pads to compensate for the taper. To lock the arms and columns in place, you will need appropriately sized M5 screws.

The central support also prevents the clamp from bending forward, which could otherwise cause damage.

The base includes slots designed to hold small locking pieces that prevent the sharpener from sliding out of its seat. I created two lateral locks and one rear lock; in my opinion, the lateral ones are sufficient. The system requires four M3 heat‑set inserts. The rear lock is not yet modeled—I will evaluate whether it is necessary in future revisions.

The project is called “GRANCHIO”, currently in Version V0, and I already have ideas for improvements. Printed entirely in grey PLA by on Creality K1 MAX, and I already have ideas for future improvements.

Jonweb

Print Settings

Printer Brand:

Creality

Printer:

K1

Rafts:

No

Supports:

No

Resolution:

0.20

Infill:

40%

Filament: Aceaddity PLA Grey Category: Tools