>>940987
look at what existing knives do

>>940987
>I'm planning a custom knife. How do I add serrations to it the right way?
knife companies use a CNC grinder.
I'd think you could build one for <$200; it would be just a 3-axis positioning setup (like a 3D printer) but with a grinding motor on it instead of a 3d print head. kinda expensive and complicated tho

much cheaper & simpler would be to get a diamond honing steel and use that instead

general process for handmade knives will be to make it straight, then add serrations after heat-treat with EDM stones and an angled jig. a few may use water-cooled grinding setups.

>>940987
Straight edges are so much nicer than combo serrated blades.

Why bother with the extra effort?

>>941007
I want to add fine serrations to the lower part of a kukri blade, since that part tends be moving more slowly and tends to slide over the object being cut more.

>>941012
>knife maker here


Without a cnc to cut the scallops (or building one like the other dumbass suggested), you can do it by hand before hardening with a rat tail file.

Cut each scallop one at a time in one sitting. Preferably in a seated position with the work low close to your lap and securely held in place. This will allow you to hold the file with a comfortably bent elbow hanging at your side swinging like a pendulum. The weight of your hand on the file will do the cutting. This setup significantly reduces muscle fatique and allows you to make exceptionally uniform strokes even as a beginner.

Your dinate hand will hold the file like a steak knife with your index finger along the back 'pointing' directly along the stroke path. Your non-dominated hand will wrap around the blade with your thumb near the contact point of the file to help in repositioning the file on each stroke.

Once you get the rhythm going youll make short work of the cut.

Polish the cuts with rounded over old hones, or round over one of the edges of a lansky style seration hone