{
 "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": "mushroom-follower-r25",
 "name": "Mushroom (curved-face) cam follower, R25 face, 8 mm stem",
 "kind": "modern",
 "category": "Hardware",
 "group": "Mechanism parts",
 "year": null,
 "question": "What is a mushroom follower?",
 "tags": [
  "mechanism part",
  "507 mechanical movements"
 ],
 "aliases": [
  "mushroom follower",
  "spherical faced follower",
  "curved face follower",
  "seguidor de seta",
  "Pilzstößel"
 ],
 "overall_mm": {
  "length": 32.5,
  "width": 59,
  "height": 6
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/mushroom-follower-r25/",
 "sheet_txt": "https://xemstudio.com/objects/mushroom-follower-r25/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design following Brown's figure (1868); true size, no printing allowance",
  "overall_mm": {
   "length": 32.5,
   "width": 59,
   "height": 6
  },
  "notes": [
   "Follower whose 36 mm wide face is an arc of 25 mm radius on an 8 × 6 mm stem: the curved face tolerates misalignment and wears more evenly than a flat one; the cam is the pitch curve offset by 25 mm.",
   "Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features)."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "face radius",
     "25 mm"
    ],
    [
     "face width",
     "36 mm"
    ],
    [
     "stem",
     "8 × 6 mm"
    ]
   ]
  }
 },
 "sheet_text": "Mushroom (curved-face) cam follower, R25 face, 8 mm stem — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/mushroom-follower-r25/  (CC BY 4.0)\nBasis: Xem Studio design following Brown's figure (1868); true size, no printing allowance\nCatalog version: 2026-10-20\n\nOverall (mm): length 32.5, width 59.0, height 6.0\n- Follower whose 36 mm wide face is an arc of 25 mm radius on an 8 × 6 mm stem: the curved face tolerates misalignment and wears more evenly than a flat one; the cam is the pitch curve offset by 25 mm.\n- Xem Studio design following Brown's figure; true size, no printing allowance (apply your own to the mating features).\n\ndimension  value\nface radius  25 mm\nface width  36 mm\nstem  8 × 6 mm\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Henry T. Brown (1868, public domain): Five Hundred and Seven Mechanical Movements — scan on archive.org — web — Publisher's page; dimensions are facts — https://archive.org/details/fivehundredseven00browiala\n- 507movements.com: Brown's movement No. 138: figure, his text and an animation — web — Publisher's page; dimensions are facts — https://507movements.com/mm_138.html\n- Xem Studio: drawing — web — Publisher's page; dimensions are facts — https://xemstudio.com/objects/plate-cam-mushroom-follower-mechanism/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/mushroom-follower-r25/index.json\nAPI: https://xemstudio.com/api/geometry?object=mushroom-follower-r25\n",
 "sources": [
  {
   "publisher": "Henry T. Brown (1868, public domain)",
   "title": "Five Hundred and Seven Mechanical Movements — scan on archive.org",
   "url": "https://archive.org/details/fivehundredseven00browiala",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "507movements.com",
   "title": "Brown's movement No. 138: figure, his text and an animation",
   "url": "https://507movements.com/mm_138.html",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Xem Studio",
   "title": "drawing",
   "url": "https://xemstudio.com/objects/plate-cam-mushroom-follower-mechanism/",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "plate-cam-mushroom-follower-mechanism"
 ],
 "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": [],
 "faq": [
  {
   "q": "What is a mushroom follower?",
   "a": "Follower whose 36 mm wide face is an arc of 25 mm radius on an 8 × 6 mm stem: the curved face tolerates misalignment and wears more evenly than a flat one; the cam is the pitch curve offset by 25 mm."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "mushroom-follower-r25",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/mushroom-follower-r25/mushroom-follower-r25.step",
   "stl": "https://xemstudio.com/files/hardware/mushroom-follower-r25/mushroom-follower-r25.stl",
   "note": "follower, face apex at y = 0"
  }
 ],
 "markdown": "https://xemstudio.com/objects/mushroom-follower-r25/index.md"
}