{
  "category": "Roller Chain",
  "vertical": "power-transmission-and-bearings",
  "source": "https://getclaro.ai/resources/attribute-library/power-transmission-and-bearings/roller-chain/",
  "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": "chain_number_trade_size",
      "label": "Chain Number",
      "group": "selection",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "60"
    },
    {
      "key": "standard_series",
      "label": "Standard",
      "group": "evidence",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "ASME B29.1 (ANSI)"
    },
    {
      "key": "pitch",
      "label": "Pitch",
      "group": "technical",
      "priority": "core",
      "value_type": "number",
      "unit": "in",
      "example_format": "0.750 in"
    },
    {
      "key": "number_of_strands",
      "label": "Number of Strands",
      "group": "selection",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "1 (simplex)"
    },
    {
      "key": "roller_diameter",
      "label": "Roller Diameter",
      "group": "technical",
      "priority": "core",
      "value_type": "number",
      "unit": "in",
      "example_format": "0.469 in"
    },
    {
      "key": "inner_width_between_roller_link_plates",
      "label": "Width Between Inner Plates",
      "group": "technical",
      "priority": "core",
      "value_type": "number",
      "unit": "in",
      "example_format": "0.500 in"
    },
    {
      "key": "chain_series_standard_vs_heavy",
      "label": "Series (Standard / Heavy)",
      "group": "selection",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Standard"
    },
    {
      "key": "material",
      "label": "Material",
      "group": "selection",
      "priority": "core",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Heat-treated carbon steel"
    },
    {
      "key": "package_length",
      "label": "Package Length",
      "group": "identity",
      "priority": "core",
      "value_type": "number",
      "unit": "ft",
      "example_format": "10 ft"
    },
    {
      "key": "manufacturer_part_number",
      "label": "Manufacturer Part Number",
      "group": "identity",
      "priority": "core",
      "value_type": "identifier",
      "unit": null,
      "example_format": "RC-60-1-10FT"
    },
    {
      "key": "gtin_upc",
      "label": "GTIN / UPC",
      "group": "identity",
      "priority": "core",
      "value_type": "identifier",
      "unit": null,
      "example_format": "081234560102"
    },
    {
      "key": "minimum_ultimate_tensile_strength_ansi",
      "label": "Minimum Ultimate Tensile Strength (standard)",
      "group": "technical",
      "priority": "differentiating",
      "value_type": "number",
      "unit": "lbf",
      "example_format": "8,500 lbf"
    },
    {
      "key": "average_tensile_strength_manufacturer",
      "label": "Average Tensile Strength (manufacturer)",
      "group": "technical",
      "priority": "differentiating",
      "value_type": "number",
      "unit": "lbf",
      "example_format": "9,500 lbf"
    },
    {
      "key": "weight_per_foot",
      "label": "Weight per Foot",
      "group": "technical",
      "priority": "differentiating",
      "value_type": "number",
      "unit": "lb/ft",
      "example_format": "1.0 lb/ft"
    },
    {
      "key": "pin_end_treatment",
      "label": "Pin End Treatment",
      "group": "selection",
      "priority": "differentiating",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Riveted"
    },
    {
      "key": "sealing_lubrication_construction",
      "label": "Sealing / Lubrication Construction",
      "group": "selection",
      "priority": "differentiating",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Pre-lubricated, standard (no O-rings)"
    },
    {
      "key": "factory_lubricant_nsf_registration",
      "label": "Factory Lubricant NSF Registration",
      "group": "evidence",
      "priority": "channel",
      "value_type": "controlled",
      "unit": null,
      "example_format": "NSF H1"
    },
    {
      "key": "country_of_origin",
      "label": "Country of Origin",
      "group": "evidence",
      "priority": "channel",
      "value_type": "controlled",
      "unit": null,
      "example_format": "Japan"
    }
  ],
  "evidence_columns": [
    "raw_value",
    "normalized_value",
    "source_uri",
    "source_page_or_row",
    "confidence",
    "review_state",
    "last_verified"
  ],
  "normalization_examples": [
    {
      "attribute": "Chain Number",
      "variants": [
        "#60",
        "60-1",
        "RC60",
        "ANSI 60",
        "No. 60",
        "60 chain"
      ],
      "normalized": "60"
    },
    {
      "attribute": "Standard",
      "variants": [
        "ANSI",
        "ASA",
        "American Standard",
        "ANSI B29.1",
        "ASME B29.1",
        "ANSI standard"
      ],
      "normalized": "ASME B29.1 (ANSI)"
    },
    {
      "attribute": "Minimum Ultimate Tensile Strength",
      "variants": [
        "8,500 lb",
        "8500 lbs",
        "8,500 lbf",
        "Min. UTS 8500",
        "37.8 kN",
        "Tensile (min) 8500"
      ],
      "normalized": "8,500 lbf"
    }
  ]
}