Knife Sharpener (+ Scissors and Chisels) - Chonk Edition

After using the “Leading Edge” system for a bit, I identified several improvements and features that I thought would improve ease of use and overall outcome; the platform felt too flimsy for me, and the old style threaded inserts were too difficult to work with.

Some of the improvements include:

• Redesigned base: Significantly larger and more stable, with provision to fill with Plaster of Paris (or something equivalent) for extra weight. This is not strictly necessary for function, but it makes a huge difference and is highly recommended. 
   
• Added counterweight to grinding bar to keep stone out of the way when changing or flipping clamps
   
• Redesigned stone holders to add gripping area for fingers; makes changing stones easier
   
• Redesigned bearing holder to accommodate two linear rods; keeps the angle from changing due to the bearing holder pivoting around one bar. The system can still be used with a single bar if desired
   
• Redesigned accessories to work with new base and use more modern threaded inserts (linked below)
   
• Redesigned knife clamps with interface wedge to increase stability
   
• Designed new front support that can be used with the large knife clamp; this increases side-to-side stability when the clamp curves upward during tightening

General Notes:

The system still uses the standard 6X1 stones that can be found online

The holes have been sized to accommodate these M4 X 6 X 6 inserts (or similar): https://www.amazon.com/Hanglife-HANGLIFE-Heat-Set-Threaded-Inserts/dp/B0CS6XGMFD?th=1

The bearing holder, and the counterweight collar, use M2 Socket Head screws. The bearing holder can also be superglued together if desired.

The counterweight is designed for 3/8" fender washers (1.25" OD). Any size washer can be used; target weight is around 100 grams.

Any parts not included in this file list can be re-used from the original “Leading Edge” model files. Same goes for the hardware list (thumb screws, M4 screws, magnets, springs etc.) 

The bottom of the base has four holes; these holes can either be used for threaded inserts so that it can be bolted down, or can be left empty and used with the attached rubber feet (recommend the rubber feet be printed from TPU)

The magnetic table has small through-holes to give the option of using the donut shaped magnets with a countersunk #4 wood screw, or just regular superglue, depending on user preference.

Some parts have a thin layer over the screw holes to improve printability; this layer can easily be punched through after printing.

Some parts need some light supports to print properly

Print Settings:

• PLA for max rigidity
• 3 perimeters
• 0.2 layer height
• 40-45% infill