{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "thrust-ball-bearings-51100-series",
 "name": "Thrust ball bearings 51100 series (51100 to 51130): bore, outside diameter, height, housing washer bore + STEP/STL envelopes",
 "kind": "standard",
 "category": "Hardware",
 "group": "Bearings, rails & motion",
 "year": null,
 "question": "What are the dimensions of 51100, 51104, 51105, 51107 and 51110 thrust ball bearings: bore, outside diameter, height and housing washer bore?",
 "tags": [
  "thrust bearing",
  "51100",
  "51104",
  "51105",
  "51107",
  "axial bearing",
  "lead screw",
  "thrust ball bearing"
 ],
 "aliases": [
  "51100 thrust bearing dimensions",
  "51101 thrust bearing dimensions",
  "51102 thrust bearing dimensions",
  "51103 thrust bearing dimensions",
  "51104 thrust bearing dimensions",
  "51105 thrust bearing dimensions",
  "51106 thrust bearing dimensions",
  "51107 thrust bearing dimensions",
  "51108 thrust bearing dimensions",
  "51110 thrust bearing",
  "51104 20x35x10",
  "51105 25x42x11",
  "51100 10x24x9",
  "thrust bearing 10mm bore",
  "axial ball bearing stl",
  "thrust ball bearing step file"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 11,
 "url": "https://xemstudio.com/objects/thrust-ball-bearings-51100-series/",
 "sheet_txt": "https://xemstudio.com/objects/thrust-ball-bearings-51100-series/sheet.txt",
 "sheet": {
  "basis": "Emerson Bearing 51100-series table, agreeing with Nachi and McMaster-Carr's open thrust ball bearings; housing washer bore from NSK-based tables (TFL, Nachi, SKDIN); McMaster-Carr linked for CAD",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "51100-series single-direction thrust ball bearings: two flat washers with a ball-and-cage set between them; they take axial load one way only. The shaft washer (tight bore d) turns with the shaft, the housing washer (looser bore, listed) stays still and sits against a shoulder. 51100 = 10 mm bore, 51101 = 12, 51102 = 15, 51103 = 17, then bore = last two digits × 5 (51105 = 25 mm) from 51104. They are used under lead screws, vertical axes and swivel bearings.",
   "Numbers: Emerson Bearing's 51100-series table for d, D and T; Auburn Bearing agrees on every row except 51102, where Auburn prints 32 × 12, which is the 51202 size; it is not used. Nachi's catalogue agrees from 51100 to 51110. McMaster-Carr's open thrust ball bearings give 50 × 70 × 14 (51110) and 100 × 135 × 25 (51120), equal to the table. The housing-washer bore (the NSK-based table on TFL Bearing, Nachi and SKDIN's 51101 page agree) is given for 51100 to 51110; for the larger sizes no source was read. The shaft washer OD equals D (SKDIN 51101: 26). Chamfer r min: 0.3 for 51100 to 51104, 0.6 for 51105 to 51110 (Nachi / TFL).",
   "Files: 11 envelopes (51100 to 51110): a single ring bore d, OD D, height T. The washers' individual thicknesses, the ball and cage are not published in these tables, so the envelope is one plain ring and is labelled so.",
   "Left out: the 51200 / 51300 / 51400 series (different heights), double-direction 52xxx, aligning washers (53xxx), load ratings, speed limits, 51132 and larger."
  ],
  "table": {
   "columns": [
    "bearing",
    "shaft washer bore d, mm",
    "outside Ø D, mm",
    "height T, mm",
    "housing washer bore, mm",
    "chamfer r min, mm"
   ],
   "rows": [
    [
     "51100",
     "10",
     "24",
     "9",
     "11",
     "0.3"
    ],
    [
     "51101",
     "12",
     "26",
     "9",
     "13",
     "0.3"
    ],
    [
     "51102",
     "15",
     "28",
     "9",
     "16",
     "0.3"
    ],
    [
     "51103",
     "17",
     "30",
     "9",
     "18",
     "0.3"
    ],
    [
     "51104",
     "20",
     "35",
     "10",
     "21",
     "0.3"
    ],
    [
     "51105",
     "25",
     "42",
     "11",
     "26",
     "0.6"
    ],
    [
     "51106",
     "30",
     "47",
     "11",
     "32",
     "0.6"
    ],
    [
     "51107",
     "35",
     "52",
     "12",
     "37",
     "0.6"
    ],
    [
     "51108",
     "40",
     "60",
     "13",
     "42",
     "0.6"
    ],
    [
     "51109",
     "45",
     "65",
     "14",
     "47",
     "0.6"
    ],
    [
     "51110",
     "50",
     "70",
     "14",
     "52",
     "0.6"
    ],
    [
     "51111",
     "55",
     "78",
     "16",
     "—",
     "—"
    ],
    [
     "51112",
     "60",
     "85",
     "17",
     "—",
     "—"
    ],
    [
     "51113",
     "65",
     "90",
     "18",
     "—",
     "—"
    ],
    [
     "51114",
     "70",
     "95",
     "18",
     "—",
     "—"
    ],
    [
     "51115",
     "75",
     "100",
     "19",
     "—",
     "—"
    ],
    [
     "51116",
     "80",
     "105",
     "19",
     "—",
     "—"
    ],
    [
     "51117",
     "85",
     "110",
     "19",
     "—",
     "—"
    ],
    [
     "51118",
     "90",
     "120",
     "22",
     "—",
     "—"
    ],
    [
     "51120",
     "100",
     "135",
     "25",
     "—",
     "—"
    ],
    [
     "51122",
     "110",
     "145",
     "25",
     "—",
     "—"
    ],
    [
     "51124",
     "120",
     "155",
     "25",
     "—",
     "—"
    ],
    [
     "51126",
     "130",
     "170",
     "30",
     "—",
     "—"
    ],
    [
     "51128",
     "140",
     "180",
     "31",
     "—",
     "—"
    ],
    [
     "51130",
     "150",
     "190",
     "31",
     "—",
     "—"
    ]
   ]
  }
 },
 "sheet_text": "Thrust ball bearings 51100 series (51100 to 51130): bore, outside diameter, height, housing washer bore + STEP/STL envelopes — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/thrust-ball-bearings-51100-series/  (sheet CC BY 4.0)\nBasis: Emerson Bearing 51100-series table, agreeing with Nachi and McMaster-Carr's open thrust ball bearings; housing washer bore from NSK-based tables (TFL, Nachi, SKDIN); McMaster-Carr linked for CAD\nCatalog version: 2026-10-20\n\nSizes: see table below\n- 51100-series single-direction thrust ball bearings: two flat washers with a ball-and-cage set between them; they take axial load one way only. The shaft washer (tight bore d) turns with the shaft, the housing washer (looser bore, listed) stays still and sits against a shoulder. 51100 = 10 mm bore, 51101 = 12, 51102 = 15, 51103 = 17, then bore = last two digits × 5 (51105 = 25 mm) from 51104. They are used under lead screws, vertical axes and swivel bearings.\n- Numbers: Emerson Bearing's 51100-series table for d, D and T; Auburn Bearing agrees on every row except 51102, where Auburn prints 32 × 12, which is the 51202 size; it is not used. Nachi's catalogue agrees from 51100 to 51110. McMaster-Carr's open thrust ball bearings give 50 × 70 × 14 (51110) and 100 × 135 × 25 (51120), equal to the table. The housing-washer bore (the NSK-based table on TFL Bearing, Nachi and SKDIN's 51101 page agree) is given for 51100 to 51110; for the larger sizes no source was read. The shaft washer OD equals D (SKDIN 51101: 26). Chamfer r min: 0.3 for 51100 to 51104, 0.6 for 51105 to 51110 (Nachi / TFL).\n- Files: 11 envelopes (51100 to 51110): a single ring bore d, OD D, height T. The washers' individual thicknesses, the ball and cage are not published in these tables, so the envelope is one plain ring and is labelled so.\n- Left out: the 51200 / 51300 / 51400 series (different heights), double-direction 52xxx, aligning washers (53xxx), load ratings, speed limits, 51132 and larger.\n\nbearing  shaft washer bore d, mm  outside Ø D, mm  height T, mm  housing washer bore, mm  chamfer r min, mm\n51100  10  24  9  11  0.3\n51101  12  26  9  13  0.3\n51102  15  28  9  16  0.3\n51103  17  30  9  18  0.3\n51104  20  35  10  21  0.3\n51105  25  42  11  26  0.6\n51106  30  47  11  32  0.6\n51107  35  52  12  37  0.6\n51108  40  60  13  42  0.6\n51109  45  65  14  47  0.6\n51110  50  70  14  52  0.6\n51111  55  78  16  —  —\n51112  60  85  17  —  —\n51113  65  90  18  —  —\n51114  70  95  18  —  —\n51115  75  100  19  —  —\n51116  80  105  19  —  —\n51117  85  110  19  —  —\n51118  90  120  22  —  —\n51120  100  135  25  —  —\n51122  110  145  25  —  —\n51124  120  155  25  —  —\n51126  130  170  30  —  —\n51128  140  180  31  —  —\n51130  150  190  31  —  —\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Emerson Bearing: 51100 series thrust ball bearings: d, D, T, 51100 to 51130 — web — Publisher's page; dimensions are facts — https://products.emersonbearing.com/printitems/ball-thrust-ball-bearings/51100-series-ball-thrust-ball-bearings?plpver=10\n- Auburn Bearing: 51100 metric thrust ball bearing series: bore, OD, height (the 51102 row there is the 51202 size and is not used) — web — Publisher's page; dimensions are facts — https://auburnbearing.com/thrust-bearings/51100-series/\n- NACHI (via AIMS Industrial): Thrust ball bearings 51100: d, D, T, r min for 51100 to 51110 (catalogue p.173-175) — web — Publisher's page; dimensions are facts — https://aimsindustrial.com.au/cdn/shop/files/NACHI-Bearings-Catalogue-Pages-173-174-175.pdf\n- TFL Bearing (NSK table): Thrust ball bearings of the series 511: d, D, T, r min, shaft washer OD, housing washer bore — web — Publisher's page; dimensions are facts — https://tflbearing.com/products/ball-bearings/thrust-ball-bearings-of-the-series-511\n- SKDIN (distributor): 51101: d 12, D 26, H 9, housing washer bore 13, shaft washer OD 26, r 0.3 — web — Publisher's page; dimensions are facts — https://www.skdin.com/products/productid-51101\n- McMaster-Carr: Open thrust ball bearings (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/open-thrust-ball-bearings\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 11 parts): https://xemstudio.com/files/hardware/thrust-ball-bearings-51100-series/index.json\nAPI: https://xemstudio.com/api/geometry?object=thrust-ball-bearings-51100-series\n",
 "sources": [
  {
   "publisher": "Emerson Bearing",
   "title": "51100 series thrust ball bearings: d, D, T, 51100 to 51130",
   "url": "https://products.emersonbearing.com/printitems/ball-thrust-ball-bearings/51100-series-ball-thrust-ball-bearings?plpver=10",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Auburn Bearing",
   "title": "51100 metric thrust ball bearing series: bore, OD, height (the 51102 row there is the 51202 size and is not used)",
   "url": "https://auburnbearing.com/thrust-bearings/51100-series/",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "NACHI (via AIMS Industrial)",
   "title": "Thrust ball bearings 51100: d, D, T, r min for 51100 to 51110 (catalogue p.173-175)",
   "url": "https://aimsindustrial.com.au/cdn/shop/files/NACHI-Bearings-Catalogue-Pages-173-174-175.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "TFL Bearing (NSK table)",
   "title": "Thrust ball bearings of the series 511: d, D, T, r min, shaft washer OD, housing washer bore",
   "url": "https://tflbearing.com/products/ball-bearings/thrust-ball-bearings-of-the-series-511",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "SKDIN (distributor)",
   "title": "51101: d 12, D 26, H 9, housing washer bore 13, shaft washer OD 26, r 0.3",
   "url": "https://www.skdin.com/products/productid-51101",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "Open thrust ball bearings (free STEP/IGES per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/open-thrust-ball-bearings",
   "formats": [
    "STEP",
    "IGES",
    "PDF"
   ],
   "license": "McMaster-Carr site terms: personal design use, no redistribution",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "deep-groove-ball-bearings-series",
  "ball-bearings-metric",
  "t8-lead-screw",
  "ball-screw-end-supports-bk-bf-fk-ff",
  "needle-roller-bearings-hk-series",
  "pillow-block-kp08"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no tolerance added)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no tolerance added. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn. Typical accuracy by process and ISO 286 fits: https://xemstudio.com/tolerances/",
 "mating": [
  {
   "feature": "bore d (shaft washer)",
   "exact": "Ø10 to Ø50 for 51100 to 51110",
   "mates": "shaft or screw end of the same nominal diameter",
   "fit": "slide",
   "files": "5"
  },
  {
   "feature": "outside Ø D / housing washer bore",
   "exact": "D = 24 to 70 mm; housing washer bore 11 to 52 mm",
   "mates": "housing shoulder bore larger than the housing-washer bore so the washer is free to centre",
   "fit": "slide",
   "files": "5"
  }
 ],
 "fit_classes": {
  "press": "stays put: pin, tube, bearing or magnet held by interference. ISO 286 equivalent: H7/p6 (locational interference) or tighter.",
  "slide": "assembles by hand and is held by a grub, pinch or clamp: shaft in a hub, rod in a socket, spigot in a bore. ISO 286 equivalent: H7/g6 or H7/h6.",
  "run": "turns or slides in use: pin in a link, rod through a guide. ISO 286 equivalent: H8/f7 (close running).",
  "socket": "large sliding fit: syringe barrel, sleeve, bobbin in a bore. ISO 286 equivalent: H9/d9 (free running) or looser.",
  "clamp": "split part that closes on the mating part with screws: make it at size.",
  "designed": "a gap that is part of the design (piston fit option, displacer gap, air gap): do not change."
 },
 "faq": [
  {
   "q": "What are the dimensions of a 51104 thrust bearing?",
   "a": "20 mm bore, 35 mm OD, 10 mm high; housing washer bore 21."
  },
  {
   "q": "What are the dimensions of a 51105 thrust bearing?",
   "a": "25 × 42 × 11 mm; housing washer bore 26."
  },
  {
   "q": "What is a 51100 thrust bearing?",
   "a": "10 × 24 × 9 mm single-direction thrust ball bearing; housing washer bore 11."
  },
  {
   "q": "Which is the smallest 51100-series thrust bearing?",
   "a": "51100: 10 mm bore, 24 mm OD, 9 mm high."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "51100-thrust-ball-bearing-envelope-10x24x9",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/thrust-ball-bearings-51100-series/51100-thrust-ball-bearing-envelope-10x24x9.step",
   "stl": "https://xemstudio.com/files/hardware/thrust-ball-bearings-51100-series/51100-thrust-ball-bearing-envelope-10x24x9.stl",
   "note": "51100 single-direction thrust ball bearing envelope: bore Ø10, outside Ø24, height 9; one plain ring (the two washers and the ball set are not separated: their thicknesses and ball size are not in the tables); nominal values"
  },
  {
   "file": "51101-thrust-ball-bearing-envelope-12x26x9",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
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   "stl": "https://xemstudio.com/files/hardware/thrust-ball-bearings-51100-series/51101-thrust-ball-bearing-envelope-12x26x9.stl",
   "note": "51101 single-direction thrust ball bearing envelope: bore Ø12, outside Ø26, height 9; one plain ring (the two washers and the ball set are not separated: their thicknesses and ball size are not in the tables); nominal values"
  },
  {
   "file": "51102-thrust-ball-bearing-envelope-15x28x9",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/thrust-ball-bearings-51100-series/51102-thrust-ball-bearing-envelope-15x28x9.stl",
   "note": "51102 single-direction thrust ball bearing envelope: bore Ø15, outside Ø28, height 9; one plain ring (the two washers and the ball set are not separated: their thicknesses and ball size are not in the tables); nominal values"
  },
  {
   "file": "51103-thrust-ball-bearing-envelope-17x30x9",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/thrust-ball-bearings-51100-series/51103-thrust-ball-bearing-envelope-17x30x9.step",
   "stl": "https://xemstudio.com/files/hardware/thrust-ball-bearings-51100-series/51103-thrust-ball-bearing-envelope-17x30x9.stl",
   "note": "51103 single-direction thrust ball bearing envelope: bore Ø17, outside Ø30, height 9; one plain ring (the two washers and the ball set are not separated: their thicknesses and ball size are not in the tables); nominal values"
  },
  {
   "file": "51104-thrust-ball-bearing-envelope-20x35x10",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
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   "stl": "https://xemstudio.com/files/hardware/thrust-ball-bearings-51100-series/51104-thrust-ball-bearing-envelope-20x35x10.stl",
   "note": "51104 single-direction thrust ball bearing envelope: bore Ø20, outside Ø35, height 10; one plain ring (the two washers and the ball set are not separated: their thicknesses and ball size are not in the tables); nominal values"
  },
  {
   "file": "51105-thrust-ball-bearing-envelope-25x42x11",
   "formats": [
    "step",
    "stl"
   ],
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   "stl": "https://xemstudio.com/files/hardware/thrust-ball-bearings-51100-series/51105-thrust-ball-bearing-envelope-25x42x11.stl",
   "note": "51105 single-direction thrust ball bearing envelope: bore Ø25, outside Ø42, height 11; one plain ring (the two washers and the ball set are not separated: their thicknesses and ball size are not in the tables); nominal values"
  },
  {
   "file": "51106-thrust-ball-bearing-envelope-30x47x11",
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    "step",
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   ],
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   "stl": "https://xemstudio.com/files/hardware/thrust-ball-bearings-51100-series/51106-thrust-ball-bearing-envelope-30x47x11.stl",
   "note": "51106 single-direction thrust ball bearing envelope: bore Ø30, outside Ø47, height 11; one plain ring (the two washers and the ball set are not separated: their thicknesses and ball size are not in the tables); nominal values"
  },
  {
   "file": "51107-thrust-ball-bearing-envelope-35x52x12",
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    "step",
    "stl"
   ],
   "price_usd": 0,
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   "stl": "https://xemstudio.com/files/hardware/thrust-ball-bearings-51100-series/51107-thrust-ball-bearing-envelope-35x52x12.stl",
   "note": "51107 single-direction thrust ball bearing envelope: bore Ø35, outside Ø52, height 12; one plain ring (the two washers and the ball set are not separated: their thicknesses and ball size are not in the tables); nominal values"
  },
  {
   "file": "51108-thrust-ball-bearing-envelope-40x60x13",
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    "step",
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   ],
   "price_usd": 0,
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   "stl": "https://xemstudio.com/files/hardware/thrust-ball-bearings-51100-series/51108-thrust-ball-bearing-envelope-40x60x13.stl",
   "note": "51108 single-direction thrust ball bearing envelope: bore Ø40, outside Ø60, height 13; one plain ring (the two washers and the ball set are not separated: their thicknesses and ball size are not in the tables); nominal values"
  },
  {
   "file": "51109-thrust-ball-bearing-envelope-45x65x14",
   "formats": [
    "step",
    "stl"
   ],
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   "step": "https://xemstudio.com/files/hardware/thrust-ball-bearings-51100-series/51109-thrust-ball-bearing-envelope-45x65x14.step",
   "stl": "https://xemstudio.com/files/hardware/thrust-ball-bearings-51100-series/51109-thrust-ball-bearing-envelope-45x65x14.stl",
   "note": "51109 single-direction thrust ball bearing envelope: bore Ø45, outside Ø65, height 14; one plain ring (the two washers and the ball set are not separated: their thicknesses and ball size are not in the tables); nominal values"
  },
  {
   "file": "51110-thrust-ball-bearing-envelope-50x70x14",
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   "stl": "https://xemstudio.com/files/hardware/thrust-ball-bearings-51100-series/51110-thrust-ball-bearing-envelope-50x70x14.stl",
   "note": "51110 single-direction thrust ball bearing envelope: bore Ø50, outside Ø70, height 14; one plain ring (the two washers and the ball set are not separated: their thicknesses and ball size are not in the tables); nominal values"
  }
 ],
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}