The Unicorn Sharpening Method (originated by David Weaver) is a woodworking technique that creates a microscopic, rounded convex bevel at the very tip of a tool like a chisel or plane iron.
How It Works
- Grind and Hone: Grind a shallow primary bevel (around 20°), then refine with an intermediate stone to create a steeper secondary bevel (around 23° to 25°).
- Buffing Stage: Press the bevel side steeply at roughly a 45° angle into a medium-density, stitched cloth or felt buffing wheel (running around 3,600 rpm) loaded with fine alumina or polishing compound (under 5 microns) for about 2 to 5 seconds.
- Micro-Round Tip: This brief buffing rounds over just the last tiny fraction of the edge, removing the brittle burr and leaving a micro-geometry that cuts cleanly while resisting edge rolling and chipping.
Benefits
- DURABILITY: Dramatically increases edge life and impact resistance, even allowing softer or cheaper steels to perform close to premium steels.
- SPEED: Takes less than a minute once you have the wheel set up, bypassing lengthy multi-stone hand-honing routines.
- PERFORMANCE: Improves wood penetration and leaves a clean surface finish,
It has been discussed extensively in our forums and on woodworking communities like Popular Woodworking or Of Making by Hand with Wood and Steel.
