chisel with 25 degrees in repeatable accuracy

[Werner Küspert]

I want to sharpen a large number of chisels at an angle of 25 degrees.
Does anyone have any advice on how I can set this angle for each chisel with repeatable accuracy?

[RichColvin]

Werner,

I worked with a number of people on this forum to design a jig for this which can be 3D printed.  Information about it is at: https://sharpeninghandbook.info/Jigs-ProjectionTTS-100.html.

Kind regards,
Rich