165 lines
6.0 KiB
HTML
165 lines
6.0 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>The Chisel Stroke • Bryce Cairo</title>
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:root {
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--ink: #2c2522;
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--paper: #f8f5f0;
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--ruling: #d4c8b0;
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font-family: Georgia, serif;
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font-size: 1.4rem;
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<script defer src="https://analytics.4ort.xyz/script.js" data-website-id="d3ed927c-888a-4a6c-ae5f-0b1c613ddf5b"></script>
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</head>
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<body>
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<div class="nav">
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<a href="index.html">Home</a>
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<a href="joint.html">The Joint</a>
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<a href="chisel-stroke.html">Chisel Stroke</a>
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</div>
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<h1>The Chisel Stroke</h1>
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<p class="lead">Not a metaphor. A procedure. How the blade enters white oak, how the shoulder yields, and why the angle is everything.</p>
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<img src="https://images.pexels.com/photos/7109996/pexels-photo-7109996.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940" alt="Craftsman using a chisel on wood with precision">
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<div class="caption">Bevel-up chisel, 25° included angle. Note the thumb placement on the handle.</div>
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<h2>I. Tool Selection</h2>
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<table class="spec-table">
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<tr><th>Parameter</th><th>Value</th><th>Rationale</th></tr>
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<tr><td>Blade Width</td><td>12mm (1/2")</td><td>Narrow enough for tight shoulders, wide enough for stability</td></tr>
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<tr><td>Included Angle</td><td>25° (bevel-up)</td><td>Balance between edge retention and entry ease</td></tr>
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<tr><td>Hollow Grind Radius</td><td>~6"</td><td>Minimizes friction during the final shaving</td></tr>
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<tr><td>Handle Material</td><td>Boxwood</td><td>Density matches hand pressure; no slip when damp</td></tr>
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</table>
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<h2>II. The Entry Angle</h2>
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<div class="step">
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<strong>Position:</strong> Hold chisel at 15° from vertical, bevel facing the waste. Not 10°, not 20°. Fifteen degrees lets the bevel ride the surface while the edge bites the shoulder line.
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</div>
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<div class="step">
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<strong>Thumb Pressure:</strong> Apply downward force through the thumb pad on the upper handle, not the palm. This transmits vibration directly to the wrist, letting you feel the grain direction change.
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</div>
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<div class="step">
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<strong>The Tap:</strong> Light mallet strike—just enough to seat the edge. Listen for the tone change from ring to dull thud. Ring means air gap; thud means contact.
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</div>
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<h2>III. The Cut Sequence</h2>
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<p>From the shoulder line inward, in three passes:</p>
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<ol>
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<li><strong>Score:</strong> One continuous shave along the shoulder line, removing 0.3mm. Establishes the reference plane.</li>
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<li><strong>Par:</strong> Parallel cuts at 2mm intervals, each removing 0.5mm. Waste falls away in ribbons, not chips.</li>
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<li><strong>Final:</strong> Single pass at 0.1mm thickness. The shaving curls completely around the blade.</li>
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</ol>
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<div class="warning">
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<strong>Failure Mode:</strong> If the shaving splinters ahead of the edge, the angle is too steep. Lift 2° and reset. If the edge digs and tears backward, you're below 12°—lower the bevel.
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</div>
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<h2>IV. Grain Alignment</h2>
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<p>White oak from the Catawba River bend runs at a 3° spiral. Approach all cuts from uphill grain. Test with a thumbnail: press perpendicular to the face. If it catches, reverse direction.</p>
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<img src="https://images.pexels.com/photos/30907896/pexels-photo-30907896.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940" alt="Traditional dovetail joint being carved">
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<div class="caption">The completed joint. Notice the clean shoulder line—no tear-out, no hesitation marks.</div>
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<h2>V. Verification</h2>
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<table class="spec-table">
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<tr><th>Test</th><th>Pass Condition</th><th>Tool</th></tr>
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<tr><td>Squareness</td><td><0.05mm deviation over 25mm</td><td>Combination square</td></tr>
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<tr><td>Surface Flatness</td><td>No light leakage under straightedge</td><td>250mm hardened steel</td></tr>
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<tr><td>Shoulder Cleanliness</td><td>Zero tear-out visible at 10x magnification</td><td>Jeweler's loupe</td></tr>
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</table>
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<footer>
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<p>Grounded in Wikidata Q221790 (woodworking joint) • <a href="https://4ort.xyz/entity/woodworking-joint">source</a></p>
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<p>Made in the Blue Ridge foothills • 2026</p>
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</footer>
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</body>
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</html>
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