{
 "version": "2026-10-20",
 "license": "Dimension sheets are written by Xem Studio from the cited sources and are free to use (CC BY 4.0, attribute 'Xem Studio'). Linked files belong to their publishers under the license shown; Xem Studio does not host them. 'license_verified: false' means the license shown is from memory or the publisher's page as last read and should be confirmed at the link before commercial use.",
 "slug": "rotary-shaft-seal-8x22x7",
 "name": "Rotary shaft lip seal 8 × 22 × 7 (envelope)",
 "kind": "standard",
 "category": "Hardware",
 "group": "Stirling & thermoacoustic",
 "year": null,
 "question": "What size shaft seal fits an 8 mm shaft in a 22 mm bore?",
 "tags": [
  "seal",
  "shaft seal",
  "lip seal",
  "tri-clamp",
  "stirling",
  "long earth society"
 ],
 "aliases": [
  "8x22x7 oil seal",
  "shaft seal 8 mm"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": true,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/rotary-shaft-seal-8x22x7/",
 "sheet_txt": "https://xemstudio.com/objects/rotary-shaft-seal-8x22x7/sheet.txt",
 "sheet": {
  "basis": "ISO 6194-1 nominal size 8 × 22 × 7; drawn as an envelope (case, lip bore, recess)",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "A bought seal drawn as the space it takes: Ø22 × 7 case, the lip on the Ø8 shaft. The same bore as a 608 bearing, so one Ø22 bore takes both."
  ],
  "table": {
   "columns": [
    "d",
    "D",
    "b"
   ],
   "rows": [
    [
     8,
     22,
     7
    ]
   ]
  }
 },
 "sheet_text": "Rotary shaft lip seal 8 × 22 × 7 (envelope) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/rotary-shaft-seal-8x22x7/  (CC BY 4.0)\nBasis: ISO 6194-1 nominal size 8 × 22 × 7; drawn as an envelope (case, lip bore, recess)\nCatalog version: 2026-10-20\n\nSizes: see table below\n- A bought seal drawn as the space it takes: Ø22 × 7 case, the lip on the Ø8 shaft. The same bore as a 608 bearing, so one Ø22 bore takes both.\n\nd  D  b\n8  22  7\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- ISO: ISO 6194-1 Rotary shaft lip-type seals: nominal dimensions (8 × 22 × 7 is a listed size) — standard — dimensions are facts [verify license at link] — https://www.iso.org/standard/41300.html\n- Long Earth Society: Engine builds — web, video — LES site — https://longearthsociety.com/engineering/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/rotary-shaft-seal-8x22x7/index.json\nAPI: https://xemstudio.com/api/geometry?object=rotary-shaft-seal-8x22x7\n",
 "sources": [
  {
   "publisher": "ISO",
   "title": "ISO 6194-1 Rotary shaft lip-type seals: nominal dimensions (8 × 22 × 7 is a listed size)",
   "url": "https://www.iso.org/standard/41300.html",
   "formats": [
    "standard"
   ],
   "license": "dimensions are facts",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "Long Earth Society",
   "title": "Engine builds",
   "url": "https://longearthsociety.com/engineering/",
   "formats": [
    "web",
    "video"
   ],
   "license": "LES site",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "tri-clamp-bearing-cap-3in",
  "list-tri-clamp-charged-beta"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. 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.",
 "mating": [
  {
   "feature": "case OD",
   "exact": "Ø22 × 7",
   "mates": "cap bore Ø22",
   "fit": "press",
   "files": "all"
  },
  {
   "feature": "lip",
   "exact": "Ø8",
   "mates": "Ø8 crank shaft",
   "fit": "run",
   "files": "all"
  }
 ],
 "fit_classes": {
  "press": "stays put: pin, tube, bearing or magnet held by interference. Typical FDM: hole +0.0 to +0.1 mm on diameter.",
  "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. Typical FDM: +0.2 mm.",
  "run": "turns or slides in use: pin in a link, rod through a guide. Typical FDM: +0.3 mm.",
  "socket": "large sliding fit: syringe barrel, sleeve, bobbin in a bore. Typical FDM: +0.3 mm.",
  "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": "Which way round?",
   "a": "Lip toward the pressure: the case's plain face toward the crankcase."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "shaft-seal-8x22x7",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/rotary-shaft-seal-8x22x7/shaft-seal-8x22x7.step",
   "stl": "https://xemstudio.com/files/hardware/rotary-shaft-seal-8x22x7/shaft-seal-8x22x7.stl",
   "note": "rotary shaft seal 8 × 22 × 7 envelope: case Ø22 × 7, lip bore Ø8, Ø16 × 4 recess on the air side"
  }
 ],
 "markdown": "https://xemstudio.com/objects/rotary-shaft-seal-8x22x7/index.md"
}