Marking Knives

Guidelines shown below are for Included Angles (α).

Japanese marking knives are typically sharpened only one side. For those,

α = β

The Projection Calculator is available for calculating setup for Tormek knife jigs. This one is web-based and does not require Excel.) CB's USB Projection Calculator is also available for calculating setup for Tormek knife jigs.

A knife is only as good as the one who wields it.

Patrick Ness

General Guidelines
Type α Point Angle Notes Recommended
Tormek Jigs
Marking Knife 25°

When looking at the blade from the side, generally it has a 120° angle. Some chose to round off the pointed tip.

A micro bevel is not usually used on this as the sharpened surface area is so small that this is not needed to make re-sharpening easier and faster.

Setting a small nose radius of 0.007 in. (0.2 mm) is a good idea. If it is too pointy, the blade's tip can rip at the wood fibers.

The Tormek SVM-45 Knife Jig works well for these, and the Tormek SVM-00 Small Knife Holder may be needed, depending on the blade and the blade's handle.

Note: In the Tormek video. Part 18: Sharpen rare and specialized tools, the use of the side of the stone is recommended. To do this, the SVD-186-R and MB-100 are used.




Notes & Comments

Information regarding Grindstones

The shape of the grind used is a call best made by the tool's use, based on their own experience. Additional notes are available on separate web pages for:

Notes are also available on a different web page for Micro / Secondary Bevels.

Online Calculators that can be used for sharpening knives.

More Information

Books & Papers

Videos & Presentations

Published Articles

Web Sites

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About this site
Remember : The goal of sharpening is to produce sharp tools, and these tools can injure you if mishandled. Safety measures should be followed to protect yourself and those in your shop. Be sure to read and follow all instructions from the manufacturer, and and utilize proper safety equipment. Never consume alcohol or anything that could impair your judgement before sharpening tools, or using sharp tools. Comments can be sent via eMail to me at