{
 "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": "one-way-clutch-bearings-hf-series",
 "name": "One-way clutch bearings HF series (HF0812, HF1012, HF1216, HF2016): roller-set bore Fw, OD, width, torque",
 "kind": "standard",
 "category": "Hardware",
 "group": "Bearings, rails & motion",
 "year": null,
 "question": "What are the dimensions of an HF0812, HF1012, HF1216 or HF2016 one-way clutch needle bearing: bore Fw, outside diameter, width and torque?",
 "tags": [
  "one-way clutch bearing",
  "HF0812",
  "HF1012",
  "HF1216",
  "HF2016",
  "needle roller clutch",
  "freewheel bearing",
  "backstop bearing",
  "drawn cup roller clutch"
 ],
 "aliases": [
  "HF0812 dimensions",
  "HF1012 dimensions",
  "HF1216 dimensions",
  "HF1416 dimensions",
  "HF1616 dimensions",
  "HF2016 dimensions",
  "HF2520 dimensions",
  "HF0612 dimensions",
  "HF0406 dimensions",
  "HF0812 8x12x12",
  "HF1012 10x14x12",
  "one way needle bearing",
  "one way clutch bearing sizes",
  "freewheel needle bearing",
  "ratchet bearing 10mm",
  "HF vs HK needle bearing",
  "HF1012 torque",
  "HF0812 torque"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": false,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/one-way-clutch-bearings-hf-series/",
 "sheet_txt": "https://xemstudio.com/objects/one-way-clutch-bearings-hf-series/sheet.txt",
 "sheet": {
  "basis": "NTN one-way clutch table (Fw, D, C, Md) with HF1012 checked against Simply Bearings; numbers only",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "HF is a one-way needle roller clutch in a drawn-cup shell: it locks the shaft in one direction and freewheels in the other (indexers, ratchets, backstops, hand-crank winches, fan and printer drives). It is a press fit in a housing bore of D; Fw is the circle inscribed to the rollers, so the shaft must be hardened and ground to that size (the HF number is Fw then width: HF1012 = 10 x 12). The matching radial bearing in the table is the HK drawn-cup needle bearing of the same Fw (page: needle-roller-bearings-hk-series).",
   "Numbers: NTN's one-way clutch table (Fw, D, C, torque Md, mass, matching HK bearing) for HF0612 to HF3520. HF1012 (10 x 14 x 12, 5.3 N m, r min 0.3, width tolerance 0/-0.3) is also on Simply Bearings, and HF0406 (4 x 8 x 6, 0.34 N m) only there, labelled as a non-standard bore. NTN's table has no HF0406, HF0306, HF0608 or HF2020. The NSK HF0812 page could not be read, so there is no maker CAD link here.",
   "Numbers only, no files: the cup lip, roller and spring geometry and the chamfers are not published in the tables read (only HF1012 and HF0406 have an r min, both from one distributor).",
   "Left out: the maximum speed (only one distributor's value was read), HFL / HFZ variants, the radial-load part numbers printed in the NTN table, and the HK bearing dimensions (see the HK page)."
  ],
  "table": {
   "columns": [
    "clutch",
    "roller-set bore Fw, mm",
    "OD D, mm",
    "width C, mm",
    "torque Md, N m",
    "matching radial bearing (HK)",
    "mass, kg",
    "source"
   ],
   "rows": [
    [
     "HF0612",
     "6",
     "10",
     "12",
     "1.76",
     "HK0609T2",
     "0.003",
     "NTN"
    ],
    [
     "HF0812",
     "8",
     "12",
     "12",
     "3.15",
     "HK0810",
     "0.0035",
     "NTN"
    ],
    [
     "HF1012",
     "10",
     "14",
     "12",
     "5.30",
     "HK1010",
     "0.004",
     "NTN + Simply Bearings (r min 0.3)"
    ],
    [
     "HF1216",
     "12",
     "18",
     "16",
     "12.2",
     "HK1212",
     "0.0116",
     "NTN"
    ],
    [
     "HF1416",
     "14",
     "20",
     "16",
     "17.3",
     "HK1412",
     "0.013",
     "NTN"
    ],
    [
     "HF1616",
     "16",
     "22",
     "16",
     "20.5",
     "HK1612",
     "0.014",
     "NTN"
    ],
    [
     "HF1816",
     "18",
     "24",
     "16",
     "24.1",
     "HK1812",
     "0.0155",
     "NTN"
    ],
    [
     "HF2016",
     "20",
     "26",
     "16",
     "28.5",
     "HK2012",
     "0.017",
     "NTN"
    ],
    [
     "HF2520",
     "25",
     "32",
     "20",
     "66",
     "HK2512",
     "0.0309",
     "NTN"
    ],
    [
     "HF3020",
     "30",
     "37",
     "20",
     "90",
     "HK3012",
     "0.036",
     "NTN"
    ],
    [
     "HF3520",
     "35",
     "42",
     "20",
     "121",
     "HK3512",
     "0.040",
     "NTN"
    ],
    [
     "HF0406",
     "4",
     "8",
     "6",
     "0.34",
     "—",
     "0.001",
     "Simply Bearings only (r min 0.3; listed as non-standard bore)"
    ]
   ]
  }
 },
 "sheet_text": "One-way clutch bearings HF series (HF0812, HF1012, HF1216, HF2016): roller-set bore Fw, OD, width, torque — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/one-way-clutch-bearings-hf-series/  (sheet CC BY 4.0)\nBasis: NTN one-way clutch table (Fw, D, C, Md) with HF1012 checked against Simply Bearings; numbers only\nCatalog version: 2026-10-20\n\nSizes: see table below\n- HF is a one-way needle roller clutch in a drawn-cup shell: it locks the shaft in one direction and freewheels in the other (indexers, ratchets, backstops, hand-crank winches, fan and printer drives). It is a press fit in a housing bore of D; Fw is the circle inscribed to the rollers, so the shaft must be hardened and ground to that size (the HF number is Fw then width: HF1012 = 10 x 12). The matching radial bearing in the table is the HK drawn-cup needle bearing of the same Fw (page: needle-roller-bearings-hk-series).\n- Numbers: NTN's one-way clutch table (Fw, D, C, torque Md, mass, matching HK bearing) for HF0612 to HF3520. HF1012 (10 x 14 x 12, 5.3 N m, r min 0.3, width tolerance 0/-0.3) is also on Simply Bearings, and HF0406 (4 x 8 x 6, 0.34 N m) only there, labelled as a non-standard bore. NTN's table has no HF0406, HF0306, HF0608 or HF2020. The NSK HF0812 page could not be read, so there is no maker CAD link here.\n- Numbers only, no files: the cup lip, roller and spring geometry and the chamfers are not published in the tables read (only HF1012 and HF0406 have an r min, both from one distributor).\n- Left out: the maximum speed (only one distributor's value was read), HFL / HFZ variants, the radial-load part numbers printed in the NTN table, and the HK bearing dimensions (see the HK page).\n\nclutch  roller-set bore Fw, mm  OD D, mm  width C, mm  torque Md, N m  matching radial bearing (HK)  mass, kg  source\nHF0612  6  10  12  1.76  HK0609T2  0.003  NTN\nHF0812  8  12  12  3.15  HK0810  0.0035  NTN\nHF1012  10  14  12  5.30  HK1010  0.004  NTN + Simply Bearings (r min 0.3)\nHF1216  12  18  16  12.2  HK1212  0.0116  NTN\nHF1416  14  20  16  17.3  HK1412  0.013  NTN\nHF1616  16  22  16  20.5  HK1612  0.014  NTN\nHF1816  18  24  16  24.1  HK1812  0.0155  NTN\nHF2016  20  26  16  28.5  HK2012  0.017  NTN\nHF2520  25  32  20  66  HK2512  0.0309  NTN\nHF3020  30  37  20  90  HK3012  0.036  NTN\nHF3520  35  42  20  121  HK3512  0.040  NTN\nHF0406  4  8  6  0.34  —  0.001  Simply Bearings only (r min 0.3; listed as non-standard bore)\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- NTN (via BDS Bearing knowledge base): One-way clutches, tension pulleys, bottom roller bearings: HF type Fw, D, C, torque Md, matching HK bearing — web — Publisher's page; dimensions are facts — https://help.bdsbearing.com/hubfs/Knowledge%20Base/NTN/NTN%20One-way%20Clutches%2c%20Tension%20Pulleys%2c%20Bottom%20Roller%20Bearings.pdf\n- Simply Bearings: HF1012 one-way needle roller clutch: Fw 10, D 14, C 12 (0/-0.3), r min 0.3, 5.3 N m — web — Publisher's page; dimensions are facts — https://www.simplybearings.co.uk/products/hf-1012-eu\n- Simply Bearings: HF0406 one-way needle roller clutch: Fw 4, D 8, C 6, r min 0.3, 0.34 N m (listed as a non-standard bore) — web — Publisher's page; dimensions are facts — https://www.simplybearings.co.uk/products/hf-0406-mb\n- McMaster-Carr: Needle 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/needle-bearings\n\nNo true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.\nAPI: https://xemstudio.com/api/geometry?object=one-way-clutch-bearings-hf-series\n",
 "sources": [
  {
   "publisher": "NTN (via BDS Bearing knowledge base)",
   "title": "One-way clutches, tension pulleys, bottom roller bearings: HF type Fw, D, C, torque Md, matching HK bearing",
   "url": "https://help.bdsbearing.com/hubfs/Knowledge%20Base/NTN/NTN%20One-way%20Clutches%2c%20Tension%20Pulleys%2c%20Bottom%20Roller%20Bearings.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Simply Bearings",
   "title": "HF1012 one-way needle roller clutch: Fw 10, D 14, C 12 (0/-0.3), r min 0.3, 5.3 N m",
   "url": "https://www.simplybearings.co.uk/products/hf-1012-eu",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Simply Bearings",
   "title": "HF0406 one-way needle roller clutch: Fw 4, D 8, C 6, r min 0.3, 0.34 N m (listed as a non-standard bore)",
   "url": "https://www.simplybearings.co.uk/products/hf-0406-mb",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "Needle bearings (free STEP/IGES per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/needle-bearings",
   "formats": [
    "STEP",
    "IGES",
    "PDF"
   ],
   "license": "McMaster-Carr site terms: personal design use, no redistribution",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "needle-roller-bearings-hk-series",
  "needle-roller-bearings-nk-rna-nks",
  "needle-roller-bearing-inner-rings-ir-lrt",
  "deep-groove-ball-bearings-series",
  "ball-bearings-metric"
 ],
 "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": [],
 "faq": [
  {
   "q": "What are the dimensions of an HF0812 one-way clutch bearing?",
   "a": "Roller-set bore Fw 8, OD 12, width 12 mm; torque 3.15 N m (NTN)."
  },
  {
   "q": "What are the dimensions of an HF1012?",
   "a": "Fw 10, OD 14, width 12 mm; torque 5.3 N m; r min 0.3 (Simply Bearings)."
  },
  {
   "q": "What do the numbers in HF1216 mean?",
   "a": "Fw 12 mm and width 16 mm; the OD is 18 mm."
  },
  {
   "q": "Which HK bearing goes with an HF1012?",
   "a": "HK1010 (NTN pairs each HF clutch with the HK of the same Fw)."
  },
  {
   "q": "Do the makers agree on HF1012?",
   "a": "Yes: 10 x 14 x 12 mm and 5.3 N m on NTN and Simply Bearings."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/one-way-clutch-bearings-hf-series/index.md"
}