Sharpening Handbook

Ring Tool

Sectional View of Ring Tool

This tool is shown ground with 2 cutting edges. I have denoted these using colors: an inner one shown as red, and an outer one shown as blue.

Inner Cutting Edge (the red part)

Outer Cutting Edge (the blue part)

There are no mistakes in woodworking ... until you run out of wood.

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The SVD-110 Tool Rest is the recommend jig to use.

General Guidelines
β₁	β₂	Comments
25°	25°	This tool is fundamentally a skew with a round edge, hence the rather acute angle. The two angles, β₁ & β₂, can be different, though that is more of a user decision regarding its use. If you choose to go this route, consider making the outer cutting edge (β₂) around 30°. All four surfaces (2 on the red edge; 2 on the blue edge) should be honed to give a smooth, sharp cutting edge.

General Guidelines

β₁

β₂

Comments

25°

This tool is fundamentally a skew with a round edge, hence the rather acute angle.

The two angles, β₁ & β₂, can be different, though that is more of a user decision regarding its use. If you choose to go this route, consider making the outer cutting edge (β₂) around 30°.

All four surfaces (2 on the red edge; 2 on the blue edge) should be honed to give a smooth, sharp cutting edge.

Notes & Comments

Information regarding Grindstones

More Information

Books & Papers

Robert Sorby have a good instruction sheet on usage and sharpening of this tool.

Web Sites

Ulf Jansson's (svarvulf) Instagram page shows many posts about usage and sharpening his variation of this tool.
Ulf designed a platform and a special jig for his Tormek to sharpen the tool.