{
  "dataset_name": "Huhb3D-Fastener-Topology",
  "version": "1.0.0",
  "display_name": "Huhb3D Fastener & Bearing Topology Dataset",
  "description": "STEP topology annotated dataset for 5 fastener and bearing components with per-face semantic labels. Includes ConcaveFeature_Hole, ConvexFeature_Bolt, and Fillet labels for robotic pick-and-place.",
  "industry": "Fastener & Bearing Manufacturing",
  "generated_at": "2026-06-07T21:29:15.884575",
  "num_objects": 5,
  "total_faces": 116,
  "total_triangles": 14506,
  "topology_categories_present": [
    "Boss",
    "Chamfer",
    "ConcaveFeature_Hole",
    "ConvexFeature_Bolt",
    "Fillet",
    "FreeSurface",
    "HorizontalPlane",
    "LateralPlane_X",
    "LateralPlane_Z",
    "NearHorizontal",
    "NearLateral_X",
    "NearLateral_Z"
  ],
  "objects": [
    {
      "name": "hex_bolt",
      "num_faces": 17,
      "num_triangles": 634,
      "shape_bounds": [
        -9.0,
        -7.7942,
        0.0,
        9.0,
        7.7942,
        47.0
      ],
      "topology_categories": [
        "Boss",
        "Chamfer",
        "HorizontalPlane",
        "LateralPlane_Z",
        "NearHorizontal",
        "NearLateral_X",
        "NearLateral_Z"
      ],
      "category_distribution": {
        "NearLateral_X": 8,
        "NearLateral_Z": 8,
        "LateralPlane_Z": 138,
        "HorizontalPlane": 4,
        "NearHorizontal": 4,
        "Boss": 142,
        "Chamfer": 330
      },
      "has_step_file": true,
      "has_grasp_recommendations": true
    },
    {
      "name": "bearing_block",
      "num_faces": 29,
      "num_triangles": 3892,
      "shape_bounds": [
        -30.0,
        -20.0,
        -15.0,
        30.0,
        20.0,
        15.0
      ],
      "topology_categories": [
        "Boss",
        "ConcaveFeature_Hole",
        "ConvexFeature_Bolt",
        "FreeSurface",
        "HorizontalPlane",
        "LateralPlane_X",
        "LateralPlane_Z"
      ],
      "category_distribution": {
        "LateralPlane_X": 4,
        "ConvexFeature_Bolt": 136,
        "ConcaveFeature_Hole": 136,
        "FreeSurface": 2784,
        "HorizontalPlane": 4,
        "LateralPlane_Z": 458,
        "Boss": 370
      },
      "has_step_file": true,
      "has_grasp_recommendations": true
    },
    {
      "name": "bearing_small",
      "num_faces": 35,
      "num_triangles": 4928,
      "shape_bounds": [
        -20.0,
        -15.0,
        -15.0,
        20.0,
        15.0,
        15.0
      ],
      "topology_categories": [
        "Boss",
        "ConcaveFeature_Hole",
        "ConvexFeature_Bolt",
        "Fillet",
        "FreeSurface",
        "HorizontalPlane",
        "LateralPlane_X",
        "LateralPlane_Z"
      ],
      "category_distribution": {
        "LateralPlane_X": 8,
        "Boss": 342,
        "ConcaveFeature_Hole": 156,
        "ConvexFeature_Bolt": 80,
        "LateralPlane_Z": 372,
        "FreeSurface": 3250,
        "HorizontalPlane": 4,
        "Fillet": 716
      },
      "has_step_file": true,
      "has_grasp_recommendations": true
    },
    {
      "name": "bearing_medium",
      "num_faces": 29,
      "num_triangles": 3892,
      "shape_bounds": [
        -30.0,
        -20.0,
        -15.0,
        30.0,
        20.0,
        15.0
      ],
      "topology_categories": [
        "Boss",
        "ConcaveFeature_Hole",
        "ConvexFeature_Bolt",
        "FreeSurface",
        "HorizontalPlane",
        "LateralPlane_X",
        "LateralPlane_Z"
      ],
      "category_distribution": {
        "LateralPlane_X": 4,
        "ConvexFeature_Bolt": 136,
        "ConcaveFeature_Hole": 136,
        "FreeSurface": 2784,
        "HorizontalPlane": 4,
        "LateralPlane_Z": 458,
        "Boss": 370
      },
      "has_step_file": true,
      "has_grasp_recommendations": true
    },
    {
      "name": "coupling",
      "num_faces": 6,
      "num_triangles": 1160,
      "shape_bounds": [
        -25.0,
        -25.0,
        -0.0,
        24.8113,
        25.0,
        50.0
      ],
      "topology_categories": [
        "Boss",
        "ConcaveFeature_Hole",
        "FreeSurface",
        "LateralPlane_Z"
      ],
      "category_distribution": {
        "FreeSurface": 302,
        "LateralPlane_Z": 582,
        "Boss": 158,
        "ConcaveFeature_Hole": 118
      },
      "has_step_file": true,
      "has_grasp_recommendations": true
    }
  ],
  "total_statistics": {
    "total_faces": 116,
    "total_triangles": 14506,
    "total_category_distribution": {
      "NearLateral_X": 8,
      "NearLateral_Z": 8,
      "LateralPlane_Z": 2008,
      "HorizontalPlane": 16,
      "NearHorizontal": 4,
      "Boss": 1382,
      "Chamfer": 330,
      "LateralPlane_X": 16,
      "ConvexFeature_Bolt": 352,
      "ConcaveFeature_Hole": 546,
      "FreeSurface": 9120,
      "Fillet": 716
    }
  },
  "pricing": {
    "personal": 39,
    "commercial": 99,
    "currency": "USD"
  },
  "legal": {
    "dataset_license": "CC-BY-4.0",
    "model_license": "CC0 (Public Domain)",
    "original_work": true,
    "commercial_use_allowed": true,
    "attribution_required": true,
    "note": "3D models are original creations released under CC0. The dataset (annotations, metadata, packaging) is licensed under CC-BY-4.0."
  },
  "source": {
    "topology_data": "Huhb3D-Topology-Dataset/objects/",
    "step_files": "original_models/step/",
    "parser": "OpenCascade STEP mesh tessellation with topology classification"
  }
}