How to Sharpen an Axe
A sharp axe is easier to control, more efficient to use and requires less effort. But sharpening an axe is not simply about making the edge as sharp as possible. The shape of the edge matters just as much as its sharpness.
Different axes – and different ways of using them – benefit from slightly different edge geometries. For most general axe work, Hults Bruk recommends maintaining a slightly convex edge.
Understanding the Axe Edge
Unlike many knives, an axe should not necessarily have a thin, flat cutting bevel.
For general chopping, felling, limbing and splitting, a slightly convex profile provides a good balance between cutting ability and edge strength. The edge remains fine enough to enter the wood efficiently while gradually becoming thicker behind the cutting edge.
This additional material supports the edge and helps it withstand the forces created when an axe strikes and passes through wood.
The important word is slightly. Too much convexity can reduce penetration, while an edge that has been ground too thin may become more susceptible to rolling, deformation or damage.
Start by Examining the Edge
Before sharpening, look carefully at the cutting edge.
If the axe is simply dull, you may only need a sharpening stone to restore it. If there are larger nicks, dents or damage, begin with a fine axe file before moving on to a stone.
Whenever possible, remove only as much steel as necessary. Every sharpening should preserve the overall geometry of the axe rather than gradually changing its shape.
Secure the axe before beginning and work in a stable position where you can control both the axe and the sharpening tool.
Step 1 – Repair Damage
For a damaged edge, use a fine-cut axe file to remove nicks and restore the shape of the cutting edge.
Work gradually along the complete edge rather than concentrating excessively on one small area.
For a general-purpose axe, work both sides of the edge and aim to keep the cutting edge centred.
Do not try to remove every mark at once. A small nick that does not affect the performance of the axe can often be allowed to disappear gradually through normal sharpening over time.
Step 2 – Create the Convex Profile
Once the edge has been restored, refine the bevel with a coarse sharpening stone or suitable diamond sharpener.
Rather than holding exactly one angle throughout the sharpening process, gradually vary the angle as you work from the bevel towards the cutting edge. This creates the gentle curve of a convex edge.
Work progressively and evenly along the entire cutting edge.
The objective is not to create a visibly rounded edge. The transition should be subtle and smooth – from the cutting edge into the body of the axe head.
For normal use, repeat the process on the opposite side so that the edge remains approximately symmetrical.
Step 3 – Refine and Hone
Move to a finer sharpening stone once the desired shape has been established.
Work alternately on both sides of the edge until the scratches from the coarser sharpening stage have been refined and any burr along the cutting edge has been removed.
A leather strop can be used as a final step. Always strop away from the cutting edge.
The result should be a clean, keen and durable working edge – not simply the thinnest edge possible.
One Edge Does Not Suit Every Job
An axe is a cutting tool, and its edge can be adapted to the work it is expected to perform.
For general outdoor use, we recommend keeping the edge balanced and slightly convex. This provides a versatile combination of penetration, durability and control.
However, experienced users sometimes modify the geometry for a particular purpose.
An axe primarily used for fine carving or hewing may benefit from a different bevel geometry. In some applications, one side can intentionally be sharpened differently from the other. This asymmetric geometry changes how the axe enters and follows the surface of the wood and can provide greater support and control when working from a particular direction.
This principle has long been used on specialized carving and broad axes.
Such adjustments should be deliberate. They specialize the axe for a particular technique and may make it less suitable for general-purpose work.
If you are unsure, maintain the original geometry of your Hults Bruk axe and sharpen both sides evenly.
Hard Wood, Soft Wood and Edge Strength
Edge geometry can also be adapted to the material being cut.
A somewhat stronger edge provides additional support when working in hard or frozen wood, where the forces on the cutting edge are greater.
A finer geometry can provide greater penetration in softer wood or for controlled woodworking, but generally at the expense of some edge strength.
There is therefore no single perfect sharpening angle for every axe, every species of wood and every user.
The goal is to find the right balance between sharpness, penetration and durability.
Avoid Overheating the Steel
If powered sharpening equipment is used, controlling temperature is essential.
Excessive heat can affect the hardened and tempered cutting edge. Never allow the edge to become hot enough to discolor the steel.
For this reason, hand files, sharpening stones and water-cooled grinding systems provide good control and are particularly well suited to axe maintenance.
Remove material slowly. Keep the edge cool. Remember that sharpening is about restoring the edge – not removing more steel than necessary.
Maintain the Edge – Don't Wait Until It Is Dull
Regular maintenance is easier on both the axe and its owner.
A few minutes with a fine sharpening stone after use can restore an edge before significant sharpening becomes necessary. This removes less material and helps preserve the original shape of the axe for years to come.
A Hults Bruk axe is made to be used.
Keep it sharp, respect its geometry and maintain it regularly, and the same axe can continue working for generations.