Guidelines shown below are for Included Angles (⍺).
Notes about Secondary Bevels are at the bottom of this page.
Sharpening axes on the Tormek uses the Tormek SVA-170 Ax Jig. Alternatively, an angle grinder can be used with a 120 grit flap disc.
| General Guidelines |
|Ax Type ||Included Angle - ⍺ ||Secondary Bevel ||Notes |
|Soft Wood ||Hard Wood |
|General ||20º ||25º ||+2-5º ||This is a guideline. Exact angles are not required. |
|Carpenter ||20º ||25º ||+2-5º ||Grind the edge so there is a longer side facing the wood. |
|Felling ||30º ||35º ||+2-5º || |
|Hunting ||30º ||35º ||+2-5º || |
Notes & Comments
- Secondary Bevel Notes :
- Some recommend a secondary bevel angle of +5º, even up to +10º. That is a decision the user should take over time.
- +2 to 5º is recommend as this allows for repeated resharpening by touching up the secondary bevel only.
- Once this becomes too time consuming (i.e., the secondary bevel becomes too large), then you will have to regrind the primary bevel.
- High speed bench grinders are NOT recommended. It is too easy to take the temper out of the blade, and the user will get very poor service from the ax. If the sharpener does not have access to a wet grinding system, then a file or stone approach should be used (as outlined in the manual noted below). Angle grinders with flap discs don't cause such a build-up of heat if used in a limited fashion (e.g., for sharpening and not shaping the angle).
- An Ax to Grind : A Practical Ax Manual is a very good good reference that was published by the United States Forest Service (yes, the Smokey Bear people !).
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