A dull axe is a dangerous axe

Every woodland worker has heard the saying and proved it true. A blunt axe does not cut; it skates off the timber, and a glancing blow carries the head past the log and towards your shin, your boot or the hand steadying the branch. A dull edge also costs three or four extra strikes for every cut, which means tired arms, poor aim and sloppy work by mid-afternoon. Sharpening is not a chore to squeeze in once a season — it is the five minutes that makes the rest of the day safe.

The good news is that axes are forgiving. A decent file, a stone, an oiled rag and a little patience will keep a working axe cutting sweetly for years.

What to look for on the edge

Look at the tool in good daylight before you touch a file to the steel.

• A gleam along the edge. A bright line where the cutting edge should be means the metal has rolled over rather than sliced.
• Nicks and chips. Small chips from grit, wire or a hidden knot will file out. Anything deeper than a couple of millimetres means taking the whole bevel back — a job for a quiet evening, not a rushed morning.
• Rounded shoulders. The line where the bevel meets the flat cheek should stay crisp. If it has blurred into a soft curve, the axe has been sharpened carelessly and will be harder to control.
• Pitting. Surface rust is harmless; deep pits beneath the bevel will keep breaking the edge away as you work.

Most British woodland axes run a bevel of 20 to 30 degrees — blunter for splitting, slimmer for green woodwork. Match the angle already on the head rather than inventing your own.

Filing the bevel

Clamp the head in a vice with soft jaws, or hold it in a gloved hand with the edge pointing away from you. Use a 200 mm second-cut file with a handle fitted — never file with a bare tang. Keep the teeth clear with a file card; clogged teeth skid and scratch.

Push the file across the bevel at the existing angle, working in one direction only and lifting it clear on the return stroke. Move from the shoulder of the bevel towards the edge, keeping the strokes long and even. Colour the bevel with a marker pen first: the ink shows exactly where you are removing metal. If it disappears at the shoulder but stays at the edge, you are filing too steeply.

For a double-bevelled axe, count strokes and swap sides regularly — ten and ten. Feel the edge against your thumbnail as you go. When the file starts to bite and the edge feels sticky, stop.

Never speed the job up with an angle grinder. The heat draws the temper from the steel in seconds, and the edge that results will fold at the first knot.

Stones, strops and the burr

Filing raises a burr — a thin wire of steel curling over on the flat side. Drag a thumbnail from the flat towards the edge and you will feel it. Left on, the axe feels sharp but cuts like a spoon.

Remove it with a fine stone: a small combination stone or diamond paddle in the field, a water stone at home for a keener finish. Lay the stone almost flat against the cheek, lift it a degree or two, and use light alternating passes, five or six each side, checking as you go. Finish on a leather strop or a flat board charged with polishing compound, twenty strokes with the edge trailing. For quick field touch-ups, a puck stone kept in a pouch does the job.

Handles: the checks that keep you safe

The head is only half the tool. Run your hand along the handle before every session.

• Cracks at the shoulder, where head meets wood, are the ones that matter. A hairline split running with the grain will open under a hard strike — retire that handle.
• A loose head. Tap the butt on a stump and listen. A dull rattle means the head is moving. Do not simply soak the axe in water; that swells the wood briefly and leaves it weaker once dry. Refit with a new wedge, or rehandle properly.
• Dry, grey wood. Thirsty handles raise blisters. Feed them boiled linseed oil in thin coats, rubbed in and left to dry somewhere warm. Three or four coats over a fortnight revives a tired haft. Never varnish or paint a working handle.
• A proud wedge. It should sit just below the surface of the eye. Tap it home if it has worked up.

Storage and the seasonal routine

An axe left in a damp shed will rust, and one left standing in a log will rust and rot its handle at the same time. Wipe the head with an oiled rag before it goes away — camellia oil or a light machine oil both work well. Keep the rag in a tin in your kit so it is always to hand.

Store axes hanging on a rack or standing head-down on a dry shelf, never on a concrete floor that sweats in cold weather. Every axe lives in a leather sheath, and the sheath comes off only when the axe is in use. Never put a wet sheath back on the blade; let both dry separately.

A simple seasonal routine sees you right. In early autumn, before the felling and hedge work begins, give every axe a full inspection: dress the bevels, take out chips, oil the handles, check the sheaths. In midwinter, after wet weather, touch up the edges and dry the kit out. In spring, as green woodworking starts, sharpen again and check that no handle has dried out over the winter.

Half an hour with a file and a rag, three or four times a year, is all it takes. Look after the edge and it will look after you.