{
  "document": ".Nikon 50 1.2_Vince 218791_(Rev6 UD)",
  "method": "Read-only live Fusion API; component proxies in assembly coordinates; API cm converted to mm. No model mutation or document save.",
  "station_z_mm": {
    "front": 100.135,
    "rear": 74.985
  },
  "station_spacing_mm": 25.15,
  "carrier_cylinder_diameters_mm": [
    74.8,
    67.5
  ],
  "rear_wheel_center_radius_mm": 30.95,
  "front_wheel_center_radius_mm": [
    34.65,
    34.6
  ],
  "wheel_bearings": [
    {
      "component_path": "Nikon 50 1.2_Mountfocus2_(Rev6 UD):1+Spring Wheel 0.7mm L18.0mm:1+Wheel Bearing:1",
      "center_mm": [
        24.501249968114887,
        24.501249968120412,
        100.13499999996328
      ],
      "axis": [
        0.7071067811865479,
        -0.7071067811865472,
        1.0886451921441504e-13
      ],
      "wheel_diameter_mm": 5
    },
    {
      "component_path": "Nikon 50 1.2_Mountfocus2_(Rev6 UD):1+Spring Wheel 1.0mm L18.0mm:1+Wheel Bearing:1",
      "center_mm": [
        21.88495487772513,
        -21.884954877726717,
        74.98499999997414
      ],
      "axis": [
        0.7071067811865475,
        0.7071067811865477,
        1.0896168924919473e-13
      ],
      "wheel_diameter_mm": 5
    },
    {
      "component_path": "Nikon 50 1.2_Mountfocus2_(Rev6 UD):1+Spring Wheel 0.7mm L18.0mm:2+Wheel Bearing:1",
      "center_mm": [
        -24.501249968117595,
        24.501249968112045,
        100.1349999999632
      ],
      "axis": [
        0.7071067811865472,
        0.7071067811865479,
        1.0890617809796323e-13
      ],
      "wheel_diameter_mm": 5
    },
    {
      "component_path": "Nikon 50 1.2_Mountfocus2_(Rev6 UD):1+Spring Wheel 1.0mm L18.0mm:2+Wheel Bearing:1",
      "center_mm": [
        24.465894629058003,
        -24.465894629063413,
        100.13499999994173
      ],
      "axis": [
        0.7071067811865471,
        0.7071067811865478,
        1.0893485598027347e-13
      ],
      "wheel_diameter_mm": 5
    },
    {
      "component_path": "Nikon 50 1.2_Mountfocus2_(Rev6 UD):1+Spring Wheel 1.0mm L18.0mm:3+Wheel Bearing:1",
      "center_mm": [
        -21.88495487772562,
        21.884954877724393,
        74.98499999998256
      ],
      "axis": [
        0.7071067811865477,
        0.7071067811865475,
        1.0592414381749639e-13
      ],
      "wheel_diameter_mm": 5
    },
    {
      "component_path": "Nikon 50 1.2_Mountfocus2_(Rev6 UD):1+Spring Wheel 1.0mm L18.0mm:4+Wheel Bearing:1",
      "center_mm": [
        -24.46589462906347,
        -24.465894629058006,
        100.13499999994168
      ],
      "axis": [
        0.7071067811865478,
        -0.7071067811865471,
        1.0870856018987898e-13
      ],
      "wheel_diameter_mm": 5
    },
    {
      "component_path": "Nikon 50 1.2_Mountfocus2_(Rev6 UD):1+Spring Wheel 1.0mm L18.0mm:5+Wheel Bearing:1",
      "center_mm": [
        -21.884954877726695,
        -21.88495487772512,
        74.98499999997365
      ],
      "axis": [
        0.7071067811865478,
        -0.7071067811865474,
        1.0878033018087353e-13
      ],
      "wheel_diameter_mm": 5
    },
    {
      "component_path": "Nikon 50 1.2_Mountfocus2_(Rev6 UD):1+Spring Wheel 1.0mm L18.0mm:6+Wheel Bearing:1",
      "center_mm": [
        21.884954877725473,
        21.88495487772425,
        74.984999999988
      ],
      "axis": [
        -0.7071067811865475,
        0.7071067811865477,
        1.0377451314966063e-13
      ],
      "wheel_diameter_mm": 5
    }
  ],
  "stiffness": "Not measured; CAD includes 0.7 and 1.0 mm spring wire. User identified it as nitinol, unknown grade/specification. Simulation initially assumes equal incremental radial support stiffness.",
  "wire_mounts": {
    "F1_TL": {
      "center": [
        -24.50125,
        24.50125,
        -12.575
      ],
      "normal": [
        -0.707106781,
        0.707106781,
        0
      ],
      "tangent": [
        0.707106781,
        0.707106781,
        0
      ],
      "holes": {
        "A": [
          -21.566757,
          31.32483,
          -10.825
        ],
        "B": [
          -31.32483,
          21.566757,
          -10.825
        ]
      },
      "supportSpan": 13.8,
      "wireLength": 18,
      "wireDiameter": 0.7,
      "bearingDiameter": 5,
      "wheelDiameter": 6.05,
      "wheelWidth": 2.8,
      "sourcePath": "Nikon 50 1.2_Mountfocus2_(Rev6 UD):1+Spring Wheel 0.7mm L18.0mm:1"
    },
    "R1_BL": {
      "center": [
        -21.884955,
        -21.884955,
        12.575
      ],
      "normal": [
        -0.707106781,
        -0.707106781,
        0
      ],
      "tangent": [
        -0.707106781,
        0.707106781,
        0
      ],
      "holes": {
        "B": [
          -18.985817,
          -28.743891,
          10.975
        ],
        "A": [
          -28.743891,
          -18.985817,
          10.975
        ]
      },
      "supportSpan": 13.8,
      "wireLength": 18,
      "wireDiameter": 1.0,
      "bearingDiameter": 5,
      "wheelDiameter": 6.05,
      "wheelWidth": 3.8,
      "sourcePath": "Nikon 50 1.2_Mountfocus2_(Rev6 UD):1+Spring Wheel 1.0mm L18.0mm:1"
    },
    "F1_TR": {
      "center": [
        24.50125,
        24.50125,
        -12.575
      ],
      "normal": [
        0.707106781,
        0.707106781,
        0
      ],
      "tangent": [
        -0.707106781,
        0.707106781,
        0
      ],
      "holes": {
        "B": [
          31.32483,
          21.566757,
          -10.825
        ],
        "A": [
          21.566757,
          31.32483,
          -10.825
        ]
      },
      "supportSpan": 13.8,
      "wireLength": 18,
      "wireDiameter": 0.7,
      "bearingDiameter": 5,
      "wheelDiameter": 6.05,
      "wheelWidth": 2.8,
      "sourcePath": "Nikon 50 1.2_Mountfocus2_(Rev6 UD):1+Spring Wheel 0.7mm L18.0mm:2"
    },
    "F1_BL": {
      "center": [
        -24.465895,
        -24.465895,
        -12.575
      ],
      "normal": [
        -0.707106781,
        -0.707106781,
        0
      ],
      "tangent": [
        -0.707106781,
        0.707106781,
        0
      ],
      "holes": {
        "A": [
          -31.32483,
          -21.566757,
          -10.975
        ],
        "B": [
          -21.566757,
          -31.32483,
          -10.975
        ]
      },
      "supportSpan": 13.8,
      "wireLength": 18,
      "wireDiameter": 1.0,
      "bearingDiameter": 5,
      "wheelDiameter": 6.05,
      "wheelWidth": 2.8,
      "sourcePath": "Nikon 50 1.2_Mountfocus2_(Rev6 UD):1+Spring Wheel 1.0mm L18.0mm:2"
    },
    "R1_TR": {
      "center": [
        21.884955,
        21.884955,
        12.575
      ],
      "normal": [
        0.707106781,
        0.707106781,
        0
      ],
      "tangent": [
        -0.707106781,
        0.707106781,
        0
      ],
      "holes": {
        "A": [
          18.985817,
          28.743891,
          10.975
        ],
        "B": [
          28.743891,
          18.985817,
          10.975
        ]
      },
      "supportSpan": 13.8,
      "wireLength": 18,
      "wireDiameter": 1.0,
      "bearingDiameter": 5,
      "wheelDiameter": 6.05,
      "wheelWidth": 3.8,
      "sourcePath": "Nikon 50 1.2_Mountfocus2_(Rev6 UD):1+Spring Wheel 1.0mm L18.0mm:3"
    },
    "F1_BR": {
      "center": [
        24.465895,
        -24.465895,
        -12.575
      ],
      "normal": [
        0.707106781,
        -0.707106781,
        0
      ],
      "tangent": [
        0.707106781,
        0.707106781,
        0
      ],
      "holes": {
        "B": [
          21.566757,
          -31.32483,
          -10.975
        ],
        "A": [
          31.32483,
          -21.566757,
          -10.975
        ]
      },
      "supportSpan": 13.8,
      "wireLength": 18,
      "wireDiameter": 1.0,
      "bearingDiameter": 5,
      "wheelDiameter": 6.05,
      "wheelWidth": 2.8,
      "sourcePath": "Nikon 50 1.2_Mountfocus2_(Rev6 UD):1+Spring Wheel 1.0mm L18.0mm:4"
    },
    "R1_BR": {
      "center": [
        21.884955,
        -21.884955,
        12.575
      ],
      "normal": [
        0.707106781,
        -0.707106781,
        0
      ],
      "tangent": [
        0.707106781,
        0.707106781,
        0
      ],
      "holes": {
        "B": [
          18.985817,
          -28.743891,
          10.975
        ],
        "A": [
          28.743891,
          -18.985817,
          10.975
        ]
      },
      "supportSpan": 13.8,
      "wireLength": 18,
      "wireDiameter": 1.0,
      "bearingDiameter": 5,
      "wheelDiameter": 6.05,
      "wheelWidth": 3.8,
      "sourcePath": "Nikon 50 1.2_Mountfocus2_(Rev6 UD):1+Spring Wheel 1.0mm L18.0mm:5"
    },
    "R1_TL": {
      "center": [
        -21.884955,
        21.884955,
        12.575
      ],
      "normal": [
        -0.707106781,
        0.707106781,
        0
      ],
      "tangent": [
        0.707106781,
        0.707106781,
        0
      ],
      "holes": {
        "A": [
          -18.985817,
          28.743891,
          10.975
        ],
        "B": [
          -28.743891,
          18.985817,
          10.975
        ]
      },
      "supportSpan": 13.8,
      "wireLength": 18,
      "wireDiameter": 1.0,
      "bearingDiameter": 5,
      "wheelDiameter": 6.05,
      "wheelWidth": 3.8,
      "sourcePath": "Nikon 50 1.2_Mountfocus2_(Rev6 UD):1+Spring Wheel 1.0mm L18.0mm:6"
    }
  },
  "mesh_source": {
    "part_count": 33,
    "triangle_count": 71592,
    "modified_before": true,
    "modified_after": true,
    "saved": false
  },
  "brass_wheel_diameter_mm": 6.05,
  "bearing_diameter_mm": 5,
  "notes": "Earlier wheel_diameter_mm=5 entries refer to the bearing, not the external brass wheel. Wire support/shim locations use the two Ø4.2 counterbore axes, 13.8 mm apart. The actual shim contour and contact patch are not separate CAD components."
}