{
  "task": "Model a stepped spur pinion shaft with integral gear and wrench flats",
  "domain": "CAD",
  "application": "Siemens NX",
  "description": "Model a stepped spur pinion shaft in millimetres as a single solid body, and produce its detail drawing. Use the supplied dimensioned diagrams diagram_01.png, diagram_01_detail01.png, diagram_01_detail02.png, diagram_01_detail03.png and diagram_01_detail04.png as the design reference.\n\nThe part is a turned shaft on one straight axis. Its overall length is 100 mm and its envelope diameter is 40 mm, which is set by the gear tip circle. Working from the left end, the shaft has:\n- a short plain journal\n- a larger collar\n- an integral spur gear with 20 teeth and a 40 mm outside diameter\n- a second larger collar\n- a long reduced shank\n\nApply the features shown on the sheets:\n- Blend concave fillets between the gear faces and the adjacent collars.\n- Round the tooth tip edges.\n- Mill a pair of opposed wrench flats into the right-hand end of the shank.\n- Chamfer or round the end.\n- Drill a small centre hole on the axis in the right-hand end face.\n\nThe end view dimensions an R11.5 (Ø23) circular feature. The model must match this value. Take step lengths and the remaining diameters from the supplied diagrams, keeping the proportions shown.\n\nSave the part as Stepped_Gear_Shaft.prt. It shall contain one solid body with no extra bodies or sheet geometry.\n\nCreate a drawing file, Stepped_Gear_Shaft_dwg1.prt, that references the part. It shall be on one A3 sheet at 1:1 scale in third angle projection, with a side view, an end view and an isometric view.\n\nShow these dimensions:\n- the 40 overall diameter\n- the 100 overall length\n- the Ø23 (R11.5) circle on the end view\n\nFill in the title block with a title, a drawing number, the sheet size and the scale, and state that 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/Stepped_Gear_Shaft.prt",
      "type": "native_project_or_dependency",
      "format": ".prt",
      "description": "The deliverable is a single-solid Stepped_Gear_Shaft.prt of the 100 mm long, 40 mm diameter 20-tooth pinion shaft, plus Stepped_Gear_Shaft_dwg1.prt containing the dimensioned A3 four-view drawing."
    },
    {
      "path": "output_files/project_files/Stepped_Gear_Shaft_dwg1.prt",
      "type": "native_project_or_dependency",
      "format": ".prt",
      "description": "The deliverable is a single-solid Stepped_Gear_Shaft.prt of the 100 mm long, 40 mm diameter 20-tooth pinion shaft, plus Stepped_Gear_Shaft_dwg1.prt containing the dimensioned A3 four-view drawing."
    },
    {
      "path": "output_files/project_files/Stepped_Gear_Shaft.stp",
      "type": "native_project_or_dependency",
      "format": ".stp",
      "description": "STEP export of the model in the same units."
    }
  ]
}