{
  "task": "Model a motorcycle rear chain sprocket with lightening cutouts and hub boss",
  "domain": "CAD",
  "application": "Siemens NX",
  "description": "Model a motorcycle rear chain sprocket as a single solid part in millimetres. Then produce a dimensioned drawing of it, following the supplied dimensioned diagrams: diagram_01.png, diagram_01_detail01.png, diagram_01_detail02.png, diagram_01_detail03.png and diagram_01_detail04.png.\n\nThe sprocket is a flat toothed plate with a raised cylindrical hub boss at its centre. The boss stands proud on both faces of the plate.\n\nGeometry:\n- Overall envelope: 272 mm across the front view horizontally and 271.63 mm vertically. The overall thickness across the hub boss is 40 mm.\n- Teeth: chain-roller teeth with rounded roots run around the full periphery.\n- Hub boss: outer radius R40, with a through bore of radius R30.\n- Bolt holes: five small round through-holes on a circle around the boss.\n- Lightening cutouts: five through-cutouts in the web, each roughly triangular and arranged in a swirl pattern. Their corners are rounded; the dimensioned corner radius is R9.5.\n- Locating dimensions in the front view:\n  - Horizontal chain: 90.97, 45.03, 74.44 and 61.56 (totalling 272).\n  - Vertical chain: 70.36, 65.45, 79.35 and 56.46 (totalling 271.63).\n\nThe finished part must be one closed solid body built from planar and cylindrical faces only.\n\nSave the model as the part file SPROCKET_WHEEL.prt.\n\nCreate a separate drawing part, SPROCKET_WHEEL_dwg1.prt, that references the model. Use one A1 sheet in third-angle projection, with labelled views:\n- FRONT VIEW: carries the R40 and R9.5 radii and the Ø60 (R30) bore.\n- A side view: carries the 40 thickness dimension.\n- ISOMETRIC VIEW.\n\nFill in the title block with a title and a drawing number, and state that all dimensions are in millimetres.",
  "input_files": [
    "task_files/diagrams/diagram_01.pdf",
    "task_files/diagrams/diagram_01.png",
    "task_files/diagrams/diagram_01_detail01.png",
    "task_files/diagrams/diagram_01_detail02.png",
    "task_files/diagrams/diagram_01_detail03.png",
    "task_files/diagrams/diagram_01_detail04.png"
  ],
  "deliverables": [
    {
      "path": "output_files/project_files/SPROCKET_WHEEL_dwg1.prt",
      "type": "native_project_or_dependency",
      "format": ".prt",
      "description": "The native deliverable is SPROCKET_WHEEL.prt, containing the single-body sprocket solid, plus SPROCKET_WHEEL_dwg1.prt, holding the A1 dimensioned drawing that references it."
    },
    {
      "path": "output_files/project_files/SPROCKET_WHEEL.prt",
      "type": "native_project_or_dependency",
      "format": ".prt",
      "description": "The native deliverable is SPROCKET_WHEEL.prt, containing the single-body sprocket solid, plus SPROCKET_WHEEL_dwg1.prt, holding the A1 dimensioned drawing that references it."
    },
    {
      "path": "output_files/project_files/SPROCKET_WHEEL.stp",
      "type": "native_project_or_dependency",
      "format": ".stp",
      "description": "STEP export of the model in the same units."
    }
  ]
}