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Router Plane |
Edge angles
The image to the right shows nomenclature used in this outline. The vertical part of the blade (which affixes to the tool holder) is shown perpendicular to the surface of the wood.
As with chisels and plane blades, both surfaces which interface to make the cutting edge must be honed. This is the angle β in the picture to the right.
It is critical that α ≥ 0. The toe (cutting edge) must not be higher than the foot (opposite from the cutting edge). If this is not the case, the cutting edge will not engage with the wood properly and will not cut correctly.
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How are such old tool designs still so relevant in today's world where we have the Internet and CNC systems? It is probably because we are clamoring for a simpler time. Rich Colvin |
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General Guidelines |
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Type |
β | α |
Comments |
| Traditional | 30° | 2° - 5° |
Top Face: When using the Tormek to sharpen the β; angle, use the SE-77 jig. The multi-base (MB-100 or MB-102) is also needed as the top face must be sharpened using the side of the grinding wheel. Bottom Face: When using the Tormek to shape or sharpen the α angle, use the SE-77 jig. |
| Melbourne Tool Company | 30° | n/a |
Melbourne Tool Company introduced a set of router planes which use a straight blade. When Using the Tormek to sharpen these, use the SE-77 jig. If the blade is too short to sharpen using the SE-77, then add the use of a multi-base (MB-100 or MB-102) to sharpen the blade's edge on the side of the grindstone. |
When grinding on the side of the grinding stone, the diamond grindstones are recommended.
It is a good practice to note the blade's angle(s) in one of these ways:
This is the preferred method as it also allows for noting other information about the blade such as metal type, where & when purchased (and cost), and any other sharpening notes.
Image captured from this video, showing the SE-77 and MB-102
