Sovereignty Module: Hew the Timber
Complete Adze and Froe Making: From Bar to Shaping Tool
Adzes and froes are essential woodworking tools for shaping beams and splitting shingles. This campaign covers tool geometry, forging, eye punching, heat treatment, and handle fitting.
Chapter 1: Tool Types
| Tool | Blade Orientation | Edge Shape | Handle | Primary Use |
|---|---|---|---|---|
| Hand adze | Perpendicular to handle | Curved | Short (14-18 inches) | Shaping, hollowing |
| Foot adze | Perpendicular to handle | Curved | Long (28-36 inches) | Hewing beams |
| Carpenter's adze | Perpendicular to handle | Flat or curved | Long (28-36 inches) | Smoothing timbers |
| Gutter adze | Perpendicular to handle | Deep curve (scoop) | Short (14-18 inches) | Hollowing troughs |
| Froe | Parallel to handle | Straight | Short (12-14 inches) | Splitting shingles, staves |
| Drawknife | Parallel to handle | Straight | Two handles | Shaving, bark removal |
Chapter 2: Adze Forging
Adze forging: 1) Start with high-carbon steel (1084 or 5160). 2) Bar: 1.5 x 1 inch, 6-8 inches long. 3) Forge eye first: punch or drift rectangular hole for handle. 4) Eye size: 1.25 x 0.75 inches (for standard handle). 5) Forge blade: draw out from eye, taper to edge. 6) Blade length: 3-5 inches from eye to edge. 7) Forge curve in blade (concave on cutting side). 8) Grind bevel: 25-30 degrees on inside (concave side). 9) Harden: heat to non-magnetic, quench in oil. 10) Temper: 425-450°F (straw to bronze).
| Dimension | Hand Adze | Foot Adze | Gutter Adze |
|---|---|---|---|
| Head weight | 1-1.5 lbs | 2-3 lbs | 1-2 lbs |
| Blade width | 2-3 inches | 3-4 inches | 2-3 inches |
| Blade length | 3-4 inches | 4-5 inches | 3-4 inches |
| Eye size | 1 x 0.625 inch | 1.25 x 0.75 inch | 1 x 0.625 inch |
| Handle length | 14-18 inches | 28-36 inches | 14-18 inches |
Chapter 3: Froe Forging
Froe: 1) Start with high-carbon steel (1084 or 5160). 2) Bar: 1.5 x 3/8 inch flat bar, 10-14 inches long. 3) Forge blade: keep flat and straight. 4) Forge eye at one end: bend end 90 degrees upward, curl into ring. 5) Eye must be perpendicular to blade. 6) Eye diameter: 1-1.25 inches (for handle). 7) Grind bevel: single bevel, 20-25 degrees. 8) Bevel on one side only (splitting side). 9) Harden: heat to non-magnetic, oil quench. 10) Temper: 450-475°F (bronze color).
| Dimension | Standard Froe | Heavy Froe |
|---|---|---|
| Blade length | 10-12 inches | 12-14 inches |
| Blade width | 1.5 inches | 2 inches |
| Blade thickness | 3/8 inch at spine | 1/2 inch at spine |
| Eye diameter | 1 inch | 1.25 inches |
| Handle length | 12-14 inches | 14-16 inches |
Chapter 4: Eye Punching
| Method | Tool | Process | Result |
|---|---|---|---|
| Hot punching | Rectangular punch | Heat steel, drive punch through | Clean eye, fast |
| Drifting | Tapered drift | Enlarge punched hole to final size | Precise fit |
| Wrapping | No punch needed | Wrap steel around mandrel, forge weld | Traditional, strong |
| Slitting and drifting | Chisel + drift | Slit steel, then drift open | Good for thin stock |
Hot punching process: 1) Heat eye area to bright orange-yellow. 2) Place on bolster plate (plate with hole larger than punch). 3) Drive rectangular punch halfway through. 4) Flip workpiece. 5) Drive punch from other side (meets in middle). 6) Slug falls through bolster plate hole. 7) Insert drift (tapered to final eye size). 8) Drive drift through to final dimension. 9) Eye should be slightly tapered (wider at top for handle wedge).
Chapter 5: Handle Fitting
| Handle Wood | Grain | Shape | Fitting |
|---|---|---|---|
| Hickory | Straight, tight | Curved (adze) or straight (froe) | Wedged in eye |
| Ash | Straight, flexible | Curved or straight | Wedged in eye |
| Dogwood | Very dense | Froe handle (straight) | Friction fit in eye |
Adze handle: 1) Select naturally curved wood (or steam-bend straight stock). 2) Shape handle to fit eye (slightly oversized). 3) Insert handle through eye from bottom. 4) Handle should protrude above eye. 5) Cut slot in protruding end. 6) Drive hardwood wedge into slot. 7) Wedge expands handle in eye, locking it in place. 8) Trim excess handle flush with eye top.
Reference Card
- The adze cuts perpendicular to the handle (unlike an axe that cuts parallel to the handle, an adze blade is oriented at 90 degrees; this allows the user to shape the surface of a timber while standing on it). 2. The froe splits, it does not cut (a froe is driven into end grain with a mallet, then the handle is twisted to lever the wood apart; the blade follows the grain, producing clean splits for shingles and staves). 3. Punch the eye before forging the blade (the eye is the most critical and difficult part of the forging; if the eye fails, the blade work is wasted; always punch the eye first). 4. Single bevel for the froe (a froe has a bevel on one side only; this asymmetric edge helps steer the split and produces flat, even pieces). 5. Curved blade for the adze (the concave curve of an adze blade allows it to scoop wood in a controlled arc; the curve determines how aggressively the tool cuts). 6. Taper the eye for wedging (an eye that is slightly wider at the top than the bottom allows a wedge to lock the handle permanently; a parallel eye allows the handle to work loose). 7. The foot adze is the timber framer's essential tool (before power tools, every timber frame was shaped with a foot adze; a skilled user can produce a surface as smooth as a planed board). 8. These are the tools that built civilization (adzes shaped the timbers of ships, houses, and temples; froes split the shingles that roofed them; these tools are the foundation of woodworking).