{
  "name": "SM_260_FA_0.06328_Mesh_fill_1",
  "sourceSHA256": "54ba9203cc540e31163d2742e2f6e3bdc8b499212304fd84259ba67b9f3a1ff1",
  "units": "millimeters as selected by user; source STL has no units metadata",
  "sourcePreserved": true,
  "sourceTriangles": 19022751,
  "previewTriangles": 179999,
  "previewReductionDeviation": {
    "medianMM": 0.014409106224775314,
    "p95MM": 0.09533142298460007,
    "maxMM": 9.298002243041992,
    "withinTargetPercent": 70.61333333333333
  },
  "deviation": {
    "sampleCount": 60000,
    "targetMM": 0.025,
    "medianMM": 1.1877607703208923,
    "p95MM": 5.1762626171112,
    "maxMM": 27.852582931518555,
    "withinTargetPercent": 3.0466666666666664,
    "comparisonTriangles": 1644756,
    "requestedCADTessellationDeflectionMM": 0.0025,
    "sampling": "60,000 original STL vertices, one vertex from uniformly selected triangle indices; deterministic seed 260",
    "meaning": "One-direction sampled distance to CAD tessellation; not an exhaustive Hausdorff bound or measurement uncertainty certificate",
    "targetMet": false
  },
  "cad": {
    "valid": true,
    "solids": 1,
    "faces": 17,
    "volumeMM3": 20129737.851794478,
    "triangles": 15854,
    "stepRoundTripValid": true,
    "assumptions": [
      "Solid shaft; internal cavities are not reconstructed.",
      "Constant outer radius, pitch, and flight thickness are idealizations.",
      "Uniform flight endpoints; tip cuts, welds, wear, and local defects are not reconstructed."
    ],
    "coordinateSystem": "Millimeters; centered fitted shaft is X axis. Frame transform is in fit.json.",
    "closed": true,
    "sectionValid": true,
    "sectionSolids": 1,
    "sectionVolumeMM3": 10064871.94034587
  },
  "fit": {
    "units": "mm (user-selected interpretation)",
    "shaftRadius": 69.57368995591531,
    "shaftLength": 1199.7431599883748,
    "shaftStart": -681.8989952695057,
    "shaftEnd": 517.844164718869,
    "flightStart": -363.6342904024122,
    "flightEnd": 512.9355085892236,
    "outerRadius": 127.38121956352332,
    "pitch": 293.0386573181316,
    "starts": 2,
    "handedness": 1,
    "phase": 0.19660305051814816,
    "angularRate": 0.02144148954504105,
    "phaseCoherence": 0.9798045208439546,
    "flightThickness": 8.810706061562469,
    "axisSource": [
      0.8857816741946261,
      -0.22910268664440758,
      0.4036121710668294
    ],
    "originSource": [
      513.4263705481267,
      -207.78583715804197,
      660.0680105980614
    ],
    "frameSource": [
      [
        0.8857816741946261,
        -0.25040456008551437,
        0.39075360772403006
      ],
      [
        -0.22910268664440758,
        -0.9681412894244207,
        -0.10106632814114878
      ],
      [
        0.4036121710668294,
        0.0,
        -0.9149301696669098
      ]
    ],
    "shaftFitMedianResidual": 0.037371424020392396
  },
  "sourceTopology": "Full-resolution source topology not validated; topology results refer to reduced preview",
  "previewTopology": {
    "components": 21,
    "edgeManifold": false,
    "closedEdges": false,
    "vertexManifold": false,
    "orientable": false
  },
  "limitations": [
    "0.025 mm target is NOT met by this CAD idealization or browser reduction.",
    "Source measurement accuracy cannot be inferred from an STL.",
    "No nominal design, datum definition, calibration, or full source-surface certification was supplied.",
    "IFC output is a reduced generic reference object, not a semantic equipment model."
  ]
}