SnapSand - Bread Knife Sharpener 7mm

Why haven't i had this idea earlier?

I swear i could not find a single good sharpening product made specifically for bread knives. Even the serration sharpening rods are too slim and only grind the center of a tooth at the correct angle. 

Finally i can push cut bread …with a serrated knife!

ABOUT:

• Made to fit typical bread knife serrations of 7mm peak to peak distance.
• Each side has a different radius!
  • Creates some tolerance to find the right fit for your knife
  • It allows you to adapt the radii to the thickness of your sandpaper
  • With the correct diameter it nicely fits into the tooth and prevents skidding between them
• Based on the latest ROUGH 93mm version (also fits thicker sandpaper) 

Everything else is just like the original SnapSand.

RESULT EXAMPLE:

BEFORE:

AFTER:

HOW TO SHARPEN A BREAD KNIFE:

      0. Make sure you attach the sandpaper tightly, for a clean radius.

1. Match the angle of the original grind
2. Sharpen each tooth individually
3. For best results repeat with a progression of sandpaper (For the example here i used 60 180 400 1000)

• Matching the angle
  • Place the 7,5 mm radius side into a single tooth and try to match the original tooth grind angle (usually around 30°), then make a few strokes:
    • TIP: You can darken the edge with a sharpie to see it better
  • Grind marks only in the middle of a tooth = your angle is too high (dull)
  • Grind marks only on the sides of a tooth = your angle is too low (sharp)
  • Grind marks even across the tooth = perfect!
    • If you cant match the tooth by changing angles, try to turn the SnapSand handle to one of the other radii
    • As you progress from thicker to thinner sandpaper it may be necessary to change the radius also.
• Sharpening each tooth
  • Keep your angle steady and constant for each tooth. 
  • For the first grind, especially with a very worn knife, use a rough sandpaper
    • As soon as your tooth has pointy tips and you can feel a burr on, move to the next tooth
  • Some sandpapers can handle grinding in both directions, some risk being cut by the knife
  • After you finish all teeth with a single grit do a single pass on the other flat side of the knife
    • A single light pass is really enough, it should only straighten the burr, do not overdo it!
    • Keep the angle flat on the flat side, do not create a new edge
    • If you plan to use progressive grits you can skip this step for the roughest grits as it may scratch your knife's surface.
• Repeat the same process for each grit
  • Finish with a single pass on the flat side with your highest grit
  • Alternatively you can also strop the knife with bent leather or its edge
    • In this case:
      • Repeatedly strop the teeth similarly to how they are sharpened and finish again on a single pass on the flat side
      • Be careful, it easily can round the tooth tips. 
      • My after examples tips are slightly rounded for this reason, they remain sharp though

HOW TO PRINT:

Please look at original SnapSand for printing instructions! 

https://www.printables.com/model/704078-snapsand-quick-reload-sanding-block#how-to-print-