{
 "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": "printable-tri-clamp-racking-arms",
 "name": "Printable tri-clamp (45°): racking arm: 1½ in clamp body and ½ in arms, 2 to 6 in reach",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Printable tri-clamp",
 "year": null,
 "question": "What is a tri-clamp racking arm (3D printable)?",
 "tags": [
  "racking arm",
  "racking",
  "fermenter",
  "3d printable",
  "supportless",
  "print friendly",
  "45 degree",
  "stl",
  "sanitary",
  "tri-clamp",
  "clamp fitting",
  "brewing",
  "homebrew"
 ],
 "aliases": [
  "tri clamp racking arm printable",
  "1.5 racking arm printable",
  "rotating racking arm stl printable",
  "3d printed tri clamp",
  "3d printable tri clamp",
  "tri clamp stl",
  "printable tri clover"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 4,
 "url": "https://xemstudio.com/objects/printable-tri-clamp-racking-arms/",
 "sheet_txt": "https://xemstudio.com/objects/printable-tri-clamp-racking-arms/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design: a 1½ in clamp body with a sealed bore for ½ in tube (two O-rings), and a bent arm that turns inside the vessel; printable 45° back cone",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "3D-printable tri-clamp: this is Xem Studio's print-friendly version of the standard sanitary fitting, drawn so it prints on an ordinary FDM or resin printer with no supports. Download the STL to print it, or the STEP to edit it. The files are true size (no printing allowance): add your own clearance in the slicer or CAD if your printer needs it.",
   "Turn the arm down to draw from the bottom, up to rack clear beer off the yeast. Fits a 1½ in side port on a fermenter.",
   "Printable tri-clamp: the ISO 2852 face and gasket groove are exactly standard, only the back cone behind each rim is 45° instead of 20°, so no rim overhangs more than 45° from vertical in any print orientation. Join these with the 45° clamps (printable-tri-clamp-clamps) and standard Type B gaskets; a 45° clamp fits only 45° rims, so keep a run all 45°. A 45° cone turns clamp force into face force at 1 : 1 (a 20° cone at 2.7 : 1), so tighten the clamp bolts harder or use M6.",
   "Print orientation: straight parts face down; elbows, tees and crosses with one face down; horizontal bores bridge their top, so keep them small or add a light tree support inside.",
   "Every clamp face is the ISO 2852 profile used across this site: 2.85 mm rim, flat face with the gasket groove (K 1.6 deep, R3 1.2 bottom, 23° walls, P2 0.8 edges) on C2, 20° back cone. Flange C3 / groove C2 / tube OD × wall, mm: ½–¾ in 25.0 / 20.4 (derived) / 12.7–19.05 × 1.65; 1–1½ in 50.5 / 43.5 / 25.4–38.1 × 1.65; 2 in 64.0 / 56.5 / 50.8 × 1.65; 2½ in 77.5 / 70.5 / 63.5 × 1.65; 3 in 91.0 / 83.5 / 76.2 × 1.65; 4 in 119.0 / 110.0 / 101.6 × 2.11; 6 in 166.9 (6.570 in) / 156.5 / 152.4 × 2.77; 8 in 217.7 (8.570 in) / 207.0 / 203.2 × 2.77; 10 in 268.5 / 261.0 / 254.0 × 3.40; 12 in 319.3 / 311.8 / 304.8 × 3.40."
  ],
  "table": {
   "columns": [
    "reach_in",
    "reach_mm",
    "tube_od_mm",
    "o_rings"
   ],
   "rows": [
    [
     2,
     50.8,
     12.7,
     "AS568-012 × 2"
    ],
    [
     4,
     101.6,
     12.7,
     "AS568-012 × 2"
    ],
    [
     6,
     152.4,
     12.7,
     "AS568-012 × 2"
    ]
   ]
  }
 },
 "sheet_text": "Printable tri-clamp (45°): racking arm: 1½ in clamp body and ½ in arms, 2 to 6 in reach — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/printable-tri-clamp-racking-arms/  (CC BY 4.0)\nBasis: Xem Studio design: a 1½ in clamp body with a sealed bore for ½ in tube (two O-rings), and a bent arm that turns inside the vessel; printable 45° back cone\nCatalog version: 2026-10-20\n\nSizes: see table below\n- 3D-printable tri-clamp: this is Xem Studio's print-friendly version of the standard sanitary fitting, drawn so it prints on an ordinary FDM or resin printer with no supports. Download the STL to print it, or the STEP to edit it. The files are true size (no printing allowance): add your own clearance in the slicer or CAD if your printer needs it.\n- Turn the arm down to draw from the bottom, up to rack clear beer off the yeast. Fits a 1½ in side port on a fermenter.\n- Printable tri-clamp: the ISO 2852 face and gasket groove are exactly standard, only the back cone behind each rim is 45° instead of 20°, so no rim overhangs more than 45° from vertical in any print orientation. Join these with the 45° clamps (printable-tri-clamp-clamps) and standard Type B gaskets; a 45° clamp fits only 45° rims, so keep a run all 45°. A 45° cone turns clamp force into face force at 1 : 1 (a 20° cone at 2.7 : 1), so tighten the clamp bolts harder or use M6.\n- Print orientation: straight parts face down; elbows, tees and crosses with one face down; horizontal bores bridge their top, so keep them small or add a light tree support inside.\n- Every clamp face is the ISO 2852 profile used across this site: 2.85 mm rim, flat face with the gasket groove (K 1.6 deep, R3 1.2 bottom, 23° walls, P2 0.8 edges) on C2, 20° back cone. Flange C3 / groove C2 / tube OD × wall, mm: ½–¾ in 25.0 / 20.4 (derived) / 12.7–19.05 × 1.65; 1–1½ in 50.5 / 43.5 / 25.4–38.1 × 1.65; 2 in 64.0 / 56.5 / 50.8 × 1.65; 2½ in 77.5 / 70.5 / 63.5 × 1.65; 3 in 91.0 / 83.5 / 76.2 × 1.65; 4 in 119.0 / 110.0 / 101.6 × 2.11; 6 in 166.9 (6.570 in) / 156.5 / 152.4 × 2.77; 8 in 217.7 (8.570 in) / 207.0 / 203.2 × 2.77; 10 in 268.5 / 261.0 / 254.0 × 3.40; 12 in 319.3 / 311.8 / 304.8 × 3.40.\n\nreach_in  reach_mm  tube_od_mm  o_rings\n2  50.8  12.7  AS568-012 × 2\n4  101.6  12.7  AS568-012 × 2\n6  152.4  12.7  AS568-012 × 2\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- GW Kent: Tri-clamp fittings guide: tube OD, flange OD and ID per size to 12 in; solid cap thickness — web — publisher's guide; dimensions cited — https://www.gwkent.com/triclamp-guide\n- Rubber Fab: Tri-Clamp gasket dimensional chart: gasket ID, OD and bead diameter per size (2 in bead 2.22 in / 56.50 mm, 1.5 in 1.71 / 43.50, 3 in 3.29 / 83.50) — PDF — maker chart; dimensions are facts [verify license at link] — https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 4 parts): https://xemstudio.com/files/hardware/printable-tri-clamp-racking-arms/index.json\nAPI: https://xemstudio.com/api/geometry?object=printable-tri-clamp-racking-arms\n",
 "sources": [
  {
   "publisher": "GW Kent",
   "title": "Tri-clamp fittings guide: tube OD, flange OD and ID per size to 12 in; solid cap thickness",
   "url": "https://www.gwkent.com/triclamp-guide",
   "formats": [
    "web"
   ],
   "license": "publisher's guide; dimensions cited",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Rubber Fab",
   "title": "Tri-Clamp gasket dimensional chart: gasket ID, OD and bead diameter per size (2 in bead 2.22 in / 56.50 mm, 1.5 in 1.71 / 43.50, 3 in 3.29 / 83.50)",
   "url": "https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf",
   "formats": [
    "PDF"
   ],
   "license": "maker chart; dimensions are facts",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "tri-clamp-racking-arms",
  "tri-clamp-dip-tube-caps",
  "tri-clamp-dished-bottom-vessels",
  "tri-clamp-butterfly-valves",
  "printable-tri-clamp-clamps"
 ],
 "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": "Can I 3D print this?",
   "a": "Yes. It is the 3D-printable version: every overhang is 45° or steeper, so it prints without supports, and the sealing face is standard ISO 2852, so a normal gasket and clamp fit."
  },
  {
   "q": "What seals the arm?",
   "a": "Two AS568-012 O-rings in the body bore; the arm turns in them."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "racking-arm-body-1.5in-45",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/printable-tri-clamp-racking-arms/racking-arm-body-1.5in-45.step",
   "stl": "https://xemstudio.com/files/hardware/printable-tri-clamp-racking-arms/racking-arm-body-1.5in-45.stl",
   "note": "1½ in clamp body: Ø24 boss 40 long, Ø12.8 bore with two AS568-012 O-ring grooves for ½ in tube — printable, 45° rims"
  },
  {
   "file": "racking-arm-tube-2in-45",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/printable-tri-clamp-racking-arms/racking-arm-tube-2in-45.step",
   "stl": "https://xemstudio.com/files/hardware/printable-tri-clamp-racking-arms/racking-arm-tube-2in-45.stl",
   "note": "½ in (Ø12.7 × 1.6) arm: 60 straight through the body, 90° bend on R25, 2 in reach — printable, 45° rims"
  },
  {
   "file": "racking-arm-tube-4in-45",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/printable-tri-clamp-racking-arms/racking-arm-tube-4in-45.step",
   "stl": "https://xemstudio.com/files/hardware/printable-tri-clamp-racking-arms/racking-arm-tube-4in-45.stl",
   "note": "½ in (Ø12.7 × 1.6) arm: 60 straight through the body, 90° bend on R25, 4 in reach — printable, 45° rims"
  },
  {
   "file": "racking-arm-tube-6in-45",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/printable-tri-clamp-racking-arms/racking-arm-tube-6in-45.step",
   "stl": "https://xemstudio.com/files/hardware/printable-tri-clamp-racking-arms/racking-arm-tube-6in-45.stl",
   "note": "½ in (Ø12.7 × 1.6) arm: 60 straight through the body, 90° bend on R25, 6 in reach — printable, 45° rims"
  }
 ],
 "markdown": "https://xemstudio.com/objects/printable-tri-clamp-racking-arms/index.md"
}