Optimum Micro bevel

[QuietOned]

Is there an optimum angle for a micro bevel?

I've been setting mine from 3° to 7° over the sharpening angle higher for rougher usage. But is there an optimum?

Anyone done any cutting tests of various microbevels? What were the findings? In general.

 

[gud4u]

For most, the final micro-bevel is 'optimized' for strengthening the cutting edge for an intended cutting task.

Most of my folders start with 10 degree main bevels, for a beginning included angle of 20 degrees. This is fine for for slicing soft materials, but the edge will not survive cutting harder materials - softer steel edges will roll and harder steel edges may chip out.

For my own testing, I use a hardwood rake handle as testing media, since that's the hardest material I'm likely to cut with a folder. If the edge survives two high-pressure pointings without edge damage, I consider it sufficient.

For steels such as S30V, VG10 or BG42, micro-bevels of 5 degrees each bevel (final included edge bevel of 30 degrees) are sufficient. My 440V Military blade passes with 2 - 3 degrees per microbevel (final included angle of 24 - 26 degrees).

Hope this helps!

 

[Cliff Stamp]

In terms of sharpening efficiency, you just need 1-2 degrees to get very strong benefits. Above this angle you are increasing strength.

-Cliff