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<h1 id="cutter-adjustment-levers-for-force-reduction">Cutter Adjustment Levers for Force Reduction</h1>
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<p>When force peaks push close to or beyond tool limits, three cutter-side levers reduce peaks without changing the NC or the toolpath.</p>
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<h2 id="shorten-tool-overhang">Shorten Tool Overhang</h2>
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<p>The unsupported tool length above the cut multiplies bending stress. A common installation leaves 15 mm or more above the flute start; reducing this exposure toward ~5 mm typically produces a large drop in the yield-stress ratio for the same NC.</p>
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<p>Process documents may fix the overhang for procedural reasons. If the engineering envelope allows, shortening the overhang is the cheapest mitigation before tuning anything else.</p>
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<h2 id="adjust-core-radius">Adjust Core Radius</h2>
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<p>Heavy-cut cutters narrow the chip-evacuation flute to thicken the cutter core, raising bending strength. The exact core radius cannot be measured externally; it is an empirical input.</p>
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<p>The HiNC default is <code>0.6</code> (cutter-core radius as a fraction of cutter radius) for 4-flute end mills. If the cutter routinely tolerates yield-stress ratios around 200 % without breakage, the actual core is thicker than the default — raise the value in steps (e.g., <code>0.7</code>) until the simulated ratio aligns with the observed safety margin.</p>
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<h2 id="upgrade-cutter-material">Upgrade Cutter Material</h2>
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<p>The default <code>WC-Co6-800nm</code> is a low-cost grade. Finer-grain or coated grades have higher yielding stress and better thermal tolerance:</p>
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<ul>
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<li><strong><code>WC-Co6-TiC-400nm</code></strong> — finer grain with TiC. A reasonable upgrade when the cutter quality is unknown but suspected better than the baseline.</li>
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</ul>
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<p>For a known cutter, configure the matching material file under <code>Resource/CutterMaterial/</code> rather than guessing the grade.</p>
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<h2 id="see-also">See Also</h2>
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<ul>
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<li><a href="machinability.html">Evaluating Process Machinability</a> — Reading the yield-stress ratio and the spindle ratios</li>
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<li><a href="nc-optimization-principles.html#tuning-peak-tolerance">Tuning Peak Tolerance</a> — Per-metric utilization factors and when each is safe to relax</li>
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<li><a href="wear.html">Tool Life & Wear</a> — Wear modes affected by material grade</li>
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