{
  "metadata": {
    "id": "rev-41-1354-90mm-traction-wheel",
    "name": "REV DUO 90mm Traction Wheel",
    "type": "wheel",
    "schema_version": "1.4.0",
    "version": "0.1.0",
    "description": "90mm DUO traction wheel with TPU tread + nylon hub. Designed to slide onto a 5mm hex shaft (no hub/set-screws required). 15mm wide. 8mm pitch mounting hole pattern on 60mm+ sizes.",
    "manufacturer": "REV Robotics",
    "part_number": "REV-41-1354 (single wheel); commonly sold as REV-41-1354-PK2 (2-pack)",
    "datasheet_url": "https://www.revrobotics.com/DUO-Traction-Wheels/"
  },
  "domains": [
    {
      "domain": "mechanical",
      "package_type": "wheel",
      "dimensions_mm": {
        "length": 90,
        "width": 90,
        "height": 15
      },
      "weight_g": 53.5,
      "resources": [
        {
          "id": "wheel_body",
          "name": "Wheel body",
          "description": "TPU tread bonded to nylon (PA66) hub.",
          "connector_type": "custom",
          "functions": [
            {
              "name": "mechanical_drive",
              "description": "Transfers torque through the wheel from the shaft to the tread/ground contact.",
              "direction": "bidirectional",
              "signal_class": "mechanical_drive"
            }
          ]
        }
      ],
      "interfaces": [
        {
          "id": "shaft_interface_5mm_hex",
          "name": "5mm hex bore",
          "description": "Integrated 5mm hex bore intended to mate with a 5mm hex shaft.",
          "protocol": {
            "type": "mechanical_connection",
            "role": "custom"
          },
          "requires": [
            {
              "function": "mechanical_drive",
              "count": 1
            }
          ],
          "max_instances": 1
        }
      ]
    }
  ],
  "usage_notes": [
    "This part is typically purchased as REV-41-1354-PK2 (2-pack). ProtoPart represents a single wheel instance.",
    "If you want this wheel to auto-connect to your existing shaft interface, make sure BOTH parts use the SAME mechanical interface protocol/type."
  ],
  "warnings": [
    "Mounting-hole count / exact pattern geometry is not specified on the product listing; only hole diameter (M3 clearance) and 8mm pitch spacing are provided. Use the STEP/Drawing for exact hole placement before committing to CAD."
  ]
}