{
 "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": "pillow-block-kp08",
 "name": "Pillow block KP08 envelope with a 608 pocket",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Motion",
 "year": null,
 "question": "What are the dimensions of a KP08 pillow block?",
 "tags": [
  "pillow block",
  "kp08",
  "bearing housing",
  "608",
  "8 mm shaft",
  "stirling",
  "long earth society"
 ],
 "aliases": [
  "kp08 dimensions",
  "kp08 pillow block step",
  "pillow block 8mm",
  "kp08 stl",
  "608 pillow block"
 ],
 "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/pillow-block-kp08/",
 "sheet_txt": "https://xemstudio.com/objects/pillow-block-kp08/sheet.txt",
 "sheet": {
  "basis": "KP08 catalogue envelope (55 × 13 base, 15 mm centre height, M5 holes 42 apart) with a Ø22 pocket at the 608 OD",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "A 55 × 13 block with R3 rounded ends; a Ø22 pocket (608 OD) runs through the 13 mm thickness on an axis 15 mm above the base.",
   "Two Ø5.5 holes (M5 clearance) through the base, 42 mm apart.",
   "The file is 25 mm tall. The catalogue KP08 housing stands 29; the top 4 mm is not drawn on this file, so the Ø22 pocket breaks out through the top face as a 9.2 mm wide opening.",
   "The 608 sits in the Ø22 pocket and carries a Ø8 shaft; the fit is listed under Mating features."
  ],
  "table": {
   "columns": [
    "feature",
    "value_mm"
   ],
   "rows": [
    [
     "base",
     "55 × 13"
    ],
    [
     "height (file)",
     25
    ],
    [
     "centre height",
     15
    ],
    [
     "bearing pocket",
     "Ø22 through 13"
    ],
    [
     "mounting holes",
     "2 × Ø5.5 at 42"
    ]
   ]
  }
 },
 "sheet_text": "Pillow block KP08 envelope with a 608 pocket — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/pillow-block-kp08/  (CC BY 4.0)\nBasis: KP08 catalogue envelope (55 × 13 base, 15 mm centre height, M5 holes 42 apart) with a Ø22 pocket at the 608 OD\nCatalog version: 2026-10-20\n\nSizes: see table below\n- A 55 × 13 block with R3 rounded ends; a Ø22 pocket (608 OD) runs through the 13 mm thickness on an axis 15 mm above the base.\n- Two Ø5.5 holes (M5 clearance) through the base, 42 mm apart.\n- The file is 25 mm tall. The catalogue KP08 housing stands 29; the top 4 mm is not drawn on this file, so the Ø22 pocket breaks out through the top face as a 9.2 mm wide opening.\n- The 608 sits in the Ø22 pocket and carries a Ø8 shaft; the fit is listed under Mating features.\n\nfeature  value_mm\nbase  55 × 13\nheight (file)  25\ncentre height  15\nbearing pocket  Ø22 through 13\nmounting holes  2 × Ø5.5 at 42\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- McMaster-Carr: Mounted bearings (free STEP per part, for your own design use; no redistribution) — STEP, PDF — McMaster-Carr site terms [verify license at link] — https://www.mcmaster.com/products/mounted-ball-bearings/\n- McMaster-Carr: Sleeve bearings (free STEP per part, for your own design use; no redistribution) — STEP, PDF — McMaster-Carr site terms [verify license at link] — https://www.mcmaster.com/products/sleeve-bearings/\n- OpenBuilds: Solid V wheel kit — web, STEP — OpenBuilds site [verify license at link] — https://openbuildspartstore.com/solid-v-wheel-kit/\n- Wikipedia: Plain bearing — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Plain_bearing\n- Long Earth Society: Engine and rig 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/pillow-block-kp08/index.json\nAPI: https://xemstudio.com/api/geometry?object=pillow-block-kp08\n",
 "sources": [
  {
   "publisher": "McMaster-Carr",
   "title": "Mounted bearings (free STEP per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/products/mounted-ball-bearings/",
   "formats": [
    "STEP",
    "PDF"
   ],
   "license": "McMaster-Carr site terms",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "Sleeve bearings (free STEP per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/products/sleeve-bearings/",
   "formats": [
    "STEP",
    "PDF"
   ],
   "license": "McMaster-Carr site terms",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "OpenBuilds",
   "title": "Solid V wheel kit",
   "url": "https://openbuildspartstore.com/solid-v-wheel-kit/",
   "formats": [
    "web",
    "STEP"
   ],
   "license": "OpenBuilds site",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "Wikipedia",
   "title": "Plain bearing",
   "url": "https://en.wikipedia.org/wiki/Plain_bearing",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text)",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Long Earth Society",
   "title": "Engine and rig 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": [
  "flange-block-kfl08",
  "608-bearing",
  "metric-shafts",
  "shaft-collars",
  "rod-support-sk8"
 ],
 "fits": [
  {
   "role": "Goes in or on",
   "items": [
    {
     "slug": "metric-shafts",
     "why": "Ø8 shaft through the 608"
    }
   ]
  },
  {
   "role": "Connects to",
   "items": [
    {
     "slug": "608-bearing",
     "why": "608 OD in the Ø22 pocket"
    }
   ]
  },
  {
   "role": "Alternatives",
   "items": [
    {
     "slug": "flange-block-kfl08",
     "why": "same 608 pocket, bolts to a wall"
    }
   ]
  },
  {
   "role": "Also needed",
   "items": [
    {
     "slug": "shaft-collars",
     "why": "Ø8 collar each side locates the shaft"
    }
   ]
  }
 ],
 "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": "bearing pocket",
   "exact": "Ø22",
   "mates": "608 bearing",
   "fit": "press",
   "files": "pillow-block-"
  },
  {
   "feature": "mounting holes",
   "exact": "Ø5.5",
   "mates": "M5 screw clearance",
   "fit": "designed",
   "files": "pillow-block-"
  }
 ],
 "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 are KP08 dimensions?",
   "a": "55 × 13 base, Ø8 shaft 15 mm above the base, two M5 holes 42 mm apart. This file is 25 tall with a Ø22 pocket for a 608."
  },
  {
   "q": "What bearing goes in the KP08 file?",
   "a": "A 608 (8 × 22 × 7) in the Ø22 pocket."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "pillow-block-kp08",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/bearing-housings-and-rod-supports/pillow-block-kp08.step",
   "stl": "https://xemstudio.com/files/hardware/bearing-housings-and-rod-supports/pillow-block-kp08.stl",
   "note": "KP08 pillow block: 29 overall height, 15 mm centre height, 55 × 13 × 5 base, Ø28 boss, Ø22 pocket for a 608 bearing through the 13 width (3 mm wall over it), two Ø5.5 (M5 clearance) holes 42 mm apart"
  }
 ],
 "markdown": "https://xemstudio.com/objects/pillow-block-kp08/index.md"
}