{
  "standard": "ГОСТ 4751-73",
  "name": "Рым-болты. Технические условия",
  "source": {
    "file": "4751-73.pdf",
    "edition": "Переиздание апрель 2008 с изменениями № 1, 2, 3, 4",
    "main_drawing_page_pdf": 2,
    "dimensions_page_pdf": 3,
    "loads_page_pdf": 4,
    "hardness_page_pdf": 5,
    "seats_page_pdf": 7
  },
  "scope": "Рым-болты для подъёма, опускания или удержания на весу изделий при монтажных и такелажных работах для всех условий эксплуатации по ГОСТ 15150.",
  "units": {
    "dimensions": "мм",
    "loads": "кг на 1 рым-болт",
    "mass": "кг"
  },
  "dimension_columns": [
    "d",
    "d1",
    "d2",
    "d3",
    "d4",
    "b",
    "h",
    "h1",
    "l",
    "l1_min",
    "r",
    "r1",
    "mass_kg"
  ],
  "dimensions": [
    {
      "thread": "M8",
      "d1": 36,
      "d2": 20,
      "d3": 8,
      "d4": 20,
      "b": 10,
      "h": 12,
      "h1": 6,
      "l": 18,
      "l1_min": 12,
      "r": 2,
      "r1": 4,
      "mass_kg": 0.05,
      "d": 8
    },
    {
      "thread": "M10",
      "d1": 45,
      "d2": 25,
      "d3": 10,
      "d4": 25,
      "b": 12,
      "h": 16,
      "h1": 8,
      "l": 21,
      "l1_min": 15,
      "r": 2,
      "r1": 4,
      "mass_kg": 0.12,
      "d": 10
    },
    {
      "thread": "M12",
      "d1": 54,
      "d2": 30,
      "d3": 12,
      "d4": 30,
      "b": 14,
      "h": 18,
      "h1": 10,
      "l": 25,
      "l1_min": 19,
      "r": 2,
      "r1": 6,
      "mass_kg": 0.19,
      "d": 12
    },
    {
      "thread": "M16",
      "d1": 63,
      "d2": 35,
      "d3": 14,
      "d4": 36,
      "b": 16,
      "h": 20,
      "h1": 12,
      "l": 32,
      "l1_min": 25,
      "r": 2,
      "r1": 6,
      "mass_kg": 0.31,
      "d": 16
    },
    {
      "thread": "M20",
      "d1": 72,
      "d2": 40,
      "d3": 16,
      "d4": 40,
      "b": 19,
      "h": 24,
      "h1": 14,
      "l": 38,
      "l1_min": 29,
      "r": 3,
      "r1": 8,
      "mass_kg": 0.5,
      "d": 20
    },
    {
      "thread": "M24",
      "d1": 90,
      "d2": 50,
      "d3": 20,
      "d4": 50,
      "b": 24,
      "h": 29,
      "h1": 16,
      "l": 45,
      "l1_min": 35,
      "r": 3,
      "r1": 12,
      "mass_kg": 0.87,
      "d": 24
    },
    {
      "thread": "M30",
      "d1": 108,
      "d2": 60,
      "d3": 24,
      "d4": 63,
      "b": 28,
      "h": 37,
      "h1": 18,
      "l": 55,
      "l1_min": 44,
      "r": 3,
      "r1": 15,
      "mass_kg": 1.58,
      "d": 30
    },
    {
      "thread": "M36",
      "d1": 126,
      "d2": 70,
      "d3": 28,
      "d4": 75,
      "b": 32,
      "h": 43,
      "h1": 22,
      "l": 63,
      "l1_min": 51,
      "r": 4,
      "r1": 18,
      "mass_kg": 2.43,
      "d": 36
    },
    {
      "thread": "M42",
      "d1": 144,
      "d2": 80,
      "d3": 32,
      "d4": 85,
      "b": 38,
      "h": 50,
      "h1": 25,
      "l": 72,
      "l1_min": 58,
      "r": 4,
      "r1": 20,
      "mass_kg": 3.72,
      "d": 42
    },
    {
      "thread": "M48",
      "d1": 162,
      "d2": 90,
      "d3": 36,
      "d4": 95,
      "b": 42,
      "h": 52,
      "h1": 30,
      "l": 82,
      "l1_min": 68,
      "r": 4,
      "r1": 22,
      "mass_kg": 5.54,
      "d": 48
    },
    {
      "thread": "M56",
      "d1": 180,
      "d2": 100,
      "d3": 40,
      "d4": 105,
      "b": 48,
      "h": 60,
      "h1": 34,
      "l": 95,
      "l1_min": 78,
      "r": 4,
      "r1": 25,
      "mass_kg": 8.09,
      "d": 56
    },
    {
      "thread": "M64",
      "d1": 198,
      "d2": 110,
      "d3": 44,
      "d4": 115,
      "b": 52,
      "h": 65,
      "h1": 40,
      "l": 110,
      "l1_min": 93,
      "r": 5,
      "r1": 25,
      "mass_kg": 10.95,
      "d": 64
    },
    {
      "thread": "M72×6",
      "d1": 234,
      "d2": 130,
      "d3": 52,
      "d4": 135,
      "b": 62,
      "h": 75,
      "h1": 45,
      "l": 115,
      "l1_min": 98,
      "r": 5,
      "r1": 35,
      "mass_kg": 18.54,
      "d": 72
    },
    {
      "thread": "M80×6",
      "d1": 270,
      "d2": 150,
      "d3": 60,
      "d4": 160,
      "b": 70,
      "h": 88,
      "h1": 50,
      "l": 125,
      "l1_min": 108,
      "r": 5,
      "r1": 35,
      "mass_kg": 25.4,
      "d": 80
    },
    {
      "thread": "M100×6",
      "d1": 324,
      "d2": 180,
      "d3": 72,
      "d4": 190,
      "b": 85,
      "h": 105,
      "h1": 60,
      "l": 150,
      "l1_min": 133,
      "r": 5,
      "r1": 40,
      "mass_kg": 43.82,
      "d": 100
    }
  ],
  "load_capacity": [
    {
      "thread": "M8",
      "vertical_kg": 120,
      "angle45_in_ring_plane_kg": 80,
      "angle45_out_of_ring_plane_kg": 40
    },
    {
      "thread": "M10",
      "vertical_kg": 200,
      "angle45_in_ring_plane_kg": 125,
      "angle45_out_of_ring_plane_kg": 65
    },
    {
      "thread": "M12",
      "vertical_kg": 300,
      "angle45_in_ring_plane_kg": 175,
      "angle45_out_of_ring_plane_kg": 90
    },
    {
      "thread": "M16",
      "vertical_kg": 550,
      "angle45_in_ring_plane_kg": 250,
      "angle45_out_of_ring_plane_kg": 125
    },
    {
      "thread": "M20",
      "vertical_kg": 850,
      "angle45_in_ring_plane_kg": 325,
      "angle45_out_of_ring_plane_kg": 150
    },
    {
      "thread": "M24",
      "vertical_kg": 1250,
      "angle45_in_ring_plane_kg": 500,
      "angle45_out_of_ring_plane_kg": 250
    },
    {
      "thread": "M30",
      "vertical_kg": 2000,
      "angle45_in_ring_plane_kg": 700,
      "angle45_out_of_ring_plane_kg": 350
    },
    {
      "thread": "M36",
      "vertical_kg": 3000,
      "angle45_in_ring_plane_kg": 1000,
      "angle45_out_of_ring_plane_kg": 500
    },
    {
      "thread": "M42",
      "vertical_kg": 4000,
      "angle45_in_ring_plane_kg": 1300,
      "angle45_out_of_ring_plane_kg": 650
    },
    {
      "thread": "M48",
      "vertical_kg": 5000,
      "angle45_in_ring_plane_kg": 1650,
      "angle45_out_of_ring_plane_kg": 800
    },
    {
      "thread": "M56",
      "vertical_kg": 6200,
      "angle45_in_ring_plane_kg": 2000,
      "angle45_out_of_ring_plane_kg": 1000
    },
    {
      "thread": "M64",
      "vertical_kg": 7500,
      "angle45_in_ring_plane_kg": 2500,
      "angle45_out_of_ring_plane_kg": 1250
    },
    {
      "thread": "M72×6",
      "vertical_kg": 10000,
      "angle45_in_ring_plane_kg": 3500,
      "angle45_out_of_ring_plane_kg": 1750
    },
    {
      "thread": "M80×6",
      "vertical_kg": 14000,
      "angle45_in_ring_plane_kg": 4500,
      "angle45_out_of_ring_plane_kg": 2250
    },
    {
      "thread": "M100×6",
      "vertical_kg": 20000,
      "angle45_in_ring_plane_kg": 6500,
      "angle45_out_of_ring_plane_kg": 3250
    }
  ],
  "load_notes": [
    "Направление строп под углом от вертикальной оси рым-болта свыше 45° не допускается.",
    "Для установки в одной плоскости колец двух ввинченных до упора рым-болтов допускаются плоские шайбы: до 1 мм для М8–М12; не более половины шага резьбы для размеров свыше М12."
  ],
  "hardness": [
    {
      "steel": "20",
      "M8_M64_HB": "105–149",
      "M72x6_M100x6_HB": "95–121"
    },
    {
      "steel": "25",
      "M8_M64_HB": "134–187",
      "M72x6_M100x6_HB": "105–149"
    }
  ],
  "seats": {
    "title": "Гнезда под рым-болты в изделиях из чёрных металлов",
    "drawing": "4751-73-gnezda.png",
    "thread": "ГОСТ 24705, поле допуска 7H по ГОСТ 16093",
    "rows": [
      {
        "d1": 13,
        "h": 5,
        "l_min": 19,
        "thread": "M8"
      },
      {
        "d1": 15,
        "h": 6,
        "l_min": 22,
        "thread": "M10"
      },
      {
        "d1": 17,
        "h": 6,
        "l_min": 26,
        "thread": "M12"
      },
      {
        "d1": 22,
        "h": 7,
        "l_min": 33,
        "thread": "M16"
      },
      {
        "d1": 28,
        "h": 9,
        "l_min": 39,
        "thread": "M20"
      },
      {
        "d1": 32,
        "h": 10,
        "l_min": 47,
        "thread": "M24"
      },
      {
        "d1": 38,
        "h": 11,
        "l_min": 57,
        "thread": "M30"
      },
      {
        "d1": 45,
        "h": 12,
        "l_min": 65,
        "thread": "M36"
      },
      {
        "d1": 52,
        "h": 14,
        "l_min": 74,
        "thread": "M42"
      },
      {
        "d1": 60,
        "h": 14,
        "l_min": 84,
        "thread": "M48"
      },
      {
        "d1": 68,
        "h": 14,
        "l_min": 97,
        "thread": "M56"
      },
      {
        "d1": 75,
        "h": 17,
        "l_min": 112,
        "thread": "M64"
      },
      {
        "d1": 85,
        "h": 17,
        "l_min": 117,
        "thread": "M72×6"
      },
      {
        "d1": 95,
        "h": 17,
        "l_min": 127,
        "thread": "M80×6"
      },
      {
        "d1": 115,
        "h": 17,
        "l_min": 152,
        "thread": "M100×6"
      }
    ]
  },
  "designation_examples": [
    "Рым-болт М8 ГОСТ 4751-73",
    "Рым-болт М100×6.019 ГОСТ 4751-73"
  ],
  "technical_requirements": {
    "material": "Сталь марки 20 или 25, подгруппа а, по ГОСТ 1050. Штамповка, допускается ковка.",
    "forging": "ГОСТ 7505, класс точности II, степень сложности С3",
    "heat_treatment": "Нормализация и очистка от окалины после штамповки или ковки. Допускается одна повторная термообработка.",
    "thread": "ГОСТ 24705, поле допуска 8g по ГОСТ 16093",
    "strength_test": "Нагрузка равна удвоенной номинальной грузоподъёмности, допускаемое отклонение ±5 %",
    "defects": "Заварка или заделка дефектов не допускается. Центровые отверстия на кольце не допускаются. Надрезы на обработанной части хвостовика не допускаются.",
    "perpendicularity_tolerance": "0,10 мм для М8–М16; 0,05 мм для М20–М100×6 на длине 100 мм",
    "symmetry_tolerance": "T1 мм для М8–М12; T2 мм для М16–М48; T4 мм для М56–М100×6",
    "coatings": "По ГОСТ 1759.0; технические требования и качество поверхности перед покрытием по ГОСТ 9.301"
  }
}