{
 "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": "swash-follower",
 "name": "Swash plate follower 8 × 8 × 30 with Ø8 ball end",
 "kind": "hardware",
 "category": "Stirling engines",
 "group": "Drives & mechanisms",
 "year": null,
 "question": "What follower rides on a swash plate?",
 "tags": [
  "follower",
  "pushrod",
  "swash plate",
  "mechanism",
  "stirling",
  "long earth society"
 ],
 "aliases": [
  "swash plate follower",
  "ball end pushrod",
  "wobble plate follower"
 ],
 "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/swash-follower/",
 "sheet_txt": "https://xemstudio.com/objects/swash-follower/sheet.txt",
 "sheet": {
  "basis": "8 mm square pushrod 30 long with an Ø8 ball on one end and a Ø3 × 10 hole in the other",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "An 8 × 8 square pushrod 30 long; an Ø8 ball centred on one end face bears on the swash plate, making it 34 overall.",
   "The other end has an axial Ø3 hole 10 deep for a Ø3 pin to the piston or link.",
   "It runs in a square 8 × 8 guide so it slides without turning."
  ],
  "table": {
   "columns": [
    "feature",
    "value_mm"
   ],
   "rows": [
    [
     "section",
     "8 × 8"
    ],
    [
     "length",
     "30 (34 with ball)"
    ],
    [
     "ball",
     "Ø8"
    ],
    [
     "tail hole",
     "Ø3 × 10"
    ]
   ]
  }
 },
 "sheet_text": "Swash plate follower 8 × 8 × 30 with Ø8 ball end — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/swash-follower/  (CC BY 4.0)\nBasis: 8 mm square pushrod 30 long with an Ø8 ball on one end and a Ø3 × 10 hole in the other\nCatalog version: 2026-10-20\n\nSizes: see table below\n- An 8 × 8 square pushrod 30 long; an Ø8 ball centred on one end face bears on the swash plate, making it 34 overall.\n- The other end has an axial Ø3 hole 10 deep for a Ø3 pin to the piston or link.\n- It runs in a square 8 × 8 guide so it slides without turning.\n\nfeature  value_mm\nsection  8 × 8\nlength  30 (34 with ball)\nball  Ø8\ntail hole  Ø3 × 10\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Wikipedia: Swashplate — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Swashplate\n- Long Earth Society: Engine and rig builds on extrusion frames — 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/swash-follower/index.json\nAPI: https://xemstudio.com/api/geometry?object=swash-follower\n",
 "sources": [
  {
   "publisher": "Wikipedia",
   "title": "Swashplate",
   "url": "https://en.wikipedia.org/wiki/Swashplate",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text)",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Long Earth Society",
   "title": "Engine and rig builds on extrusion frames",
   "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": [
  "swash-plate-40mm",
  "pins-3mm",
  "four-bar-links"
 ],
 "fits": [
  {
   "role": "Connects to",
   "items": [
    {
     "slug": "swash-plate-40mm",
     "why": "Ø8 ball on the tilted face"
    }
   ]
  },
  {
   "role": "Also needed",
   "items": [
    {
     "slug": "pins-3mm",
     "why": "Ø3 pin in the tail"
    }
   ]
  }
 ],
 "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": "follower tail hole",
   "exact": "Ø3",
   "mates": "Ø3 pin",
   "fit": "run",
   "files": "swash-follower-"
  }
 ],
 "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": "What size is the swash follower?",
   "a": "8 × 8 × 30 with an Ø8 ball end, 34 overall, Ø3 × 10 tail hole."
  },
  {
   "q": "What connects to the follower tail?",
   "a": "A Ø3 pin in the Ø3 × 10 hole."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "swash-follower-8x30",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/swash-plate/swash-follower-8x30.step",
   "stl": "https://xemstudio.com/files/hardware/swash-plate/swash-follower-8x30.stl",
   "note": "swash follower: 8 mm square pushrod with a Ø8 ball end, Ø3 tail hole"
  }
 ],
 "markdown": "https://xemstudio.com/objects/swash-follower/index.md"
}