{
  "category": "Ball Bearings",
  "vertical": "power-transmission-and-bearings",
  "source": "https://getclaro.ai/resources/attribute-library/power-transmission-and-bearings/ball-bearings/",
  "status": "editorial-draft",
  "note": "Editorial reference template. Example values show format only and do not describe a real SKU. Not an official ETIM or ECLASS class.",
  "groups": [
    {
      "key": "identity",
      "name": "Identity",
      "check": "Preserve leading zeros and punctuation, validate against the manufacturer record, and check the GTIN check digit and packaging level before linking."
    },
    {
      "key": "technical",
      "name": "Technical specifications",
      "check": "Store the number and unit separately. Convert only when the source unit and test conditions are known."
    },
    {
      "key": "selection",
      "name": "Selection attributes",
      "check": "Map supplier wording to a governed vocabulary only after checking the source text and which variant it applies to."
    },
    {
      "key": "fit",
      "name": "Fit & compatibility",
      "check": "Keep model and series qualifiers. A similar-looking part is not a verified fit until a source says so."
    },
    {
      "key": "evidence",
      "name": "Evidence & compliance",
      "check": "Link the manufacturer document or label with its edition or date. Never copy a certification from a neighboring SKU."
    }
  ],
  "fields": [
    {
      "key": "bearing_type",
      "label": "Bearing Type",
      "group": "selection",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Deep groove ball bearing, single row"
    },
    {
      "key": "bore_diameter_d",
      "label": "Bore Diameter (d)",
      "group": "technical",
      "priority": "core",
      "value_type": "number",
      "unit": "mm",
      "example_format": "25 mm"
    },
    {
      "key": "outside_diameter_d",
      "label": "Outside Diameter (D)",
      "group": "technical",
      "priority": "core",
      "value_type": "number",
      "unit": "mm",
      "example_format": "52 mm"
    },
    {
      "key": "width_b",
      "label": "Width (B)",
      "group": "technical",
      "priority": "core",
      "value_type": "number",
      "unit": "mm",
      "example_format": "15 mm"
    },
    {
      "key": "bearing_number_iso_base_number",
      "label": "Basic Bearing Designation",
      "group": "identity",
      "priority": "core",
      "value_type": "identifier",
      "unit": null,
      "example_format": "6205"
    },
    {
      "key": "manufacturer_part_number_mpn",
      "label": "Manufacturer Part Number (MPN)",
      "group": "identity",
      "priority": "core",
      "value_type": "identifier",
      "unit": null,
      "example_format": "6205-2RS/C3"
    },
    {
      "key": "seal_shield_type",
      "label": "Seal / Shield Type",
      "group": "selection",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Contact seal, both sides"
    },
    {
      "key": "basic_dynamic_load_rating_c",
      "label": "Basic Dynamic Load Rating (C)",
      "group": "technical",
      "priority": "differentiating",
      "value_type": "number",
      "unit": "kN",
      "example_format": "14.8 kN"
    },
    {
      "key": "basic_static_load_rating_c0",
      "label": "Basic Static Load Rating (C0)",
      "group": "technical",
      "priority": "differentiating",
      "value_type": "number",
      "unit": "kN",
      "example_format": "7.8 kN"
    },
    {
      "key": "radial_internal_clearance",
      "label": "Radial Internal Clearance",
      "group": "selection",
      "priority": "differentiating",
      "value_type": "controlled",
      "unit": null,
      "example_format": "C3"
    },
    {
      "key": "limiting_speed",
      "label": "Limiting Speed",
      "group": "technical",
      "priority": "differentiating",
      "value_type": "number",
      "unit": "rpm",
      "example_format": "7,500 rpm"
    },
    {
      "key": "cage_type_material",
      "label": "Cage Type / Material",
      "group": "selection",
      "priority": "differentiating",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Pressed steel"
    },
    {
      "key": "ring_ball_material",
      "label": "Ring & Ball Material",
      "group": "selection",
      "priority": "differentiating",
      "value_type": "controlled",
      "unit": null,
      "example_format": "52100 chrome steel"
    },
    {
      "key": "operating_temperature_range",
      "label": "Operating Temperature Range",
      "group": "technical",
      "priority": "differentiating",
      "value_type": "text",
      "unit": "°C",
      "example_format": "-30 °C to +110 °C"
    },
    {
      "key": "precision_class_iso_492_abec",
      "label": "Tolerance Class (ISO 492 / ABMA)",
      "group": "selection",
      "priority": "channel",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Normal (ABEC 1)"
    },
    {
      "key": "gtin_upc",
      "label": "GTIN",
      "group": "identity",
      "priority": "channel",
      "value_type": "identifier",
      "unit": null,
      "example_format": "4812345620500"
    },
    {
      "key": "country_of_origin",
      "label": "Country of Origin",
      "group": "evidence",
      "priority": "channel",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Germany"
    },
    {
      "key": "hts_code",
      "label": "HTS Code",
      "group": "evidence",
      "priority": "channel",
      "value_type": "identifier",
      "unit": null,
      "example_format": "8482.10.50"
    }
  ],
  "evidence_columns": [
    "raw_value",
    "normalized_value",
    "source_uri",
    "source_page_or_row",
    "confidence",
    "review_state",
    "last_verified"
  ],
  "normalization_examples": [
    {
      "attribute": "Seal / Shield Type",
      "variants": [
        "2RS",
        "2RS1",
        "2RSR",
        "DDU",
        "Double Sealed",
        "Sealed both sides"
      ],
      "normalized": "Contact seal, both sides"
    },
    {
      "attribute": "Radial Internal Clearance",
      "variants": [
        "C3",
        "/C3",
        "C 3",
        "C3 Clearance",
        "Clearance C3",
        "C3 (greater than normal)"
      ],
      "normalized": "C3"
    },
    {
      "attribute": "Bore Diameter",
      "variants": [
        "25mm",
        "25 mm",
        "25.0",
        "0.9843\"",
        "0.9843 in",
        "d=25"
      ],
      "normalized": "25 mm"
    }
  ]
}