# Sovereignty Module: Link the Chain

## Complete Chain Making and Blacksmithing Links: From Rod to Chain

Chain is essential for draft animals, lifting, anchoring, and securing. This campaign covers link forging, welding, chain assembly, and testing.

### Chapter 1: Chain Types

| Type | Link Shape | Use | Strength | Difficulty |
|---|---|---|---|---|
| Trace chain (draft) | Oval, elongated | Connecting draft animals to implements | High | Moderate |
| Log chain | Round or oval, heavy | Skidding logs, heavy hauling | Very high | Moderate-high |
| Tie chain | Round, light | Tethering animals | Moderate | Low-moderate |
| Decorative chain | Various | Hanging signs, lamps | Low | Low |
| Proof chain (tested) | Oval, uniform | Critical lifting, anchoring | Very high (tested) | High |

### Chapter 2: Link Forging

Basic link forging: 1) Start with round rod (3/8-1/2 inch for medium chain). 2) Cut rod to length (circumference of desired link plus overlap for weld). 3) Heat rod to bright orange. 4) Bend around horn of anvil into oval or round shape. 5) Overlap ends (scarfed joint for forge welding). 6) Heat overlapped ends to welding temperature (bright yellow/white). 7) Apply flux (borax) to joint. 8) Forge weld: hammer overlapped ends together on anvil. 9) Shape link on horn to final oval form. 10) Cool and inspect weld (no gaps, no cold shuts).

| Link Size | Rod Diameter | Link Length | Link Width | Chain Strength (approx) |
|---|---|---|---|---|
| Light (tie chain) | 1/4 inch | 1.5 inches | 3/4 inch | 500-1,000 lbs |
| Medium (trace chain) | 3/8 inch | 2 inches | 1 inch | 1,500-3,000 lbs |
| Heavy (log chain) | 1/2 inch | 2.5 inches | 1.25 inches | 3,000-6,000 lbs |
| Very heavy (anchor) | 5/8 inch | 3 inches | 1.5 inches | 5,000-10,000 lbs |

### Chapter 3: Chain Assembly

Assembly process: 1) Forge first link and close (weld shut). 2) Thread next rod through first link before bending. 3) Bend second rod around horn (with first link threaded on). 4) Weld second link shut. 5) Thread third rod through second link. 6) Continue alternating: thread, bend, weld. 7) Each link passes through the previous one. 8) Maintain consistent link size (use jig or template). 9) Test each weld by striking link against anvil edge. 10) A chain is only as strong as its weakest link.

### Chapter 4: Chain Hardware

| Hardware | Purpose | Forging Method | Difficulty |
|---|---|---|---|
| Grab hook | Shortening chain, attaching to load | Forge from 3/4 inch bar, bend hook, forge throat | Moderate |
| Slip hook | Quick release under load | Similar to grab hook with wider throat | Moderate |
| Clevis | Connecting chain to implement | Forge U-shape from flat bar, drill pin hole | Low-moderate |
| Swivel | Prevents chain from twisting | Forge eye and hook that rotate freely | High |
| Ring (master link) | End termination, attachment point | Forge weld large ring | Low-moderate |
| S-hook | Quick connection | Bend rod into S shape | Very low |

### Chapter 5: Testing and Maintenance

| Test | Method | Purpose | When |
|---|---|---|---|
| Visual inspection | Examine each link for cracks, wear, deformation | Identify obvious defects | Before every use |
| Proof test | Load to 2x working load, hold, release | Verify strength | After manufacture |
| Drop test | Drop chain on hard surface, listen for ring | Detect cracked links (dull sound = crack) | Periodically |
| Stretch test | Measure length before and after loading | Detect elongation (sign of overload) | After heavy use |

### Reference Card

1. A chain is only as strong as its weakest link (every link must be forged and welded to the same standard; one poor weld and the entire chain fails under load). 2. The forge weld is the critical skill (chain links are closed by forge welding; a cold shut or incomplete weld will fail; practice welding before making chain). 3. Thread before bending (each new link must be threaded through the previous link before bending and welding; forgetting this step means cutting a link to add the new one). 4. Use a jig for consistency (a simple bending jig ensures every link is the same size; inconsistent links make weak, ugly chain). 5. Flux prevents oxidation (borax flux applied to the scarfed joint before welding prevents oxide scale from forming; oxide in the weld creates a weak joint). 6. Test every link (strike each welded link against the anvil edge; a good weld rings; a bad weld cracks or opens; catch failures before the chain goes into service). 7. Never exceed working load (chain rated for 3,000 pounds should never be loaded beyond 3,000 pounds; the proof test at 2x working load is a one-time verification, not an operating limit). 8. Chain making is meditative work (the rhythm of cut, heat, bend, thread, weld, shape, repeat produces a useful product and develops the smith's most important skill: the forge weld).