{
 "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": "list-alpha-v-twin-syringe",
 "name": "Build list: Alpha V-twin, two 10 mL syringes",
 "kind": "list",
 "category": "Stirling engines",
 "group": "Guide",
 "year": null,
 "question": "What parts do I need to build an Alpha V-twin, two 10 mL syringes?",
 "tags": [
  "list",
  "build",
  "stirling",
  "alpha",
  "syringe",
  "long earth society"
 ],
 "aliases": [
  "alpha stirling parts list",
  "two syringe stirling engine build",
  "syringe alpha stirling"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": true,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/list-alpha-v-twin-syringe/",
 "sheet_txt": "https://xemstudio.com/objects/list-alpha-v-twin-syringe/sheet.txt",
 "sheet": {
  "basis": "Every printed part is a free file on this site.",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Two syringes in a 90° V on one crank pin: the alpha with no displacer, checked so the pistons stay in and the rods clear.",
   "Numbers: stroke 16 · rod 60 · 2.6 mL per cylinder · 90° phase from the V · Ø100 nut flywheel"
  ],
  "table": {
   "columns": [
    "subsystem",
    "object",
    "parts",
    "qty",
    "note"
   ],
   "rows": [
    [
     "Frame",
     "alpha-v-twin-frame",
     "alpha-frame-10ml",
     1,
     "print on its back; both barrel axes pass through the crank axis"
    ],
    [
     "Crank disc",
     "alpha-v-twin-frame",
     "alpha-crank-disc-s16",
     1,
     "ONE pin: the 90° V gives the 90° phase"
    ],
    [
     "Con-rods",
     "alpha-v-twin-frame",
     "alpha-conrod-60",
     2,
     "60 mm so they clear the barrel walls"
    ],
    [
     "Pistons",
     "syringe-pistons",
     "syringe-piston-10ml-f008",
     2,
     "replace the plungers; lap into the barrels, run dry"
    ],
    [
     "Cylinders",
     "plastic-syringes",
     "syringe-10ml",
     2,
     "barrels only."
    ],
    [
     "Crankshaft",
     "stirling-shafts-and-rods",
     "crankshaft-5x80-dflat",
     1,
     "print flat side down, 100 % infill"
    ],
    [
     "Bearings",
     "ball-bearings-metric",
     "bearing-625",
     2,
     "both ends of the boss"
    ],
    [
     "Crank pin",
     "stirling-shafts-and-rods",
     "pin-3x20",
     1,
     "pressed 6 mm into the disc."
    ],
    [
     "Spacers",
     "stirling-shafts-and-rods",
     "spacer-5mm-t2, spacer-3mm-t1",
     1,
     "2 mm boss-to-disc on the shaft; 1 mm disc-rod and rod-rod on the pin"
    ],
    [
     "Pin collar",
     "shaft-collars-clips-and-shafts",
     "collar-3mm",
     1,
     "keeps rod 2 on the pin"
    ],
    [
     "Piston pins",
     "dowel-pins-metric",
     "dowel-3x12",
     2,
     "through each piston fork"
    ],
    [
     "Flywheel",
     "nut-weighted-flywheels",
     "flywheel-100-m8-b5",
     1,
     "behind the boss; 12 M8 nuts, remove until it still carries"
    ],
    [
     "Flywheel weights",
     "nut-weighted-flywheels",
     "nut-m8",
     12,
     "remove until it still carries"
    ],
    [
     "Transfer",
     "alpha-twin-crank-90",
     "transfer-tee-4mm",
     1,
     "between the syringe tips; regenerator plug of #100 mesh in the tee"
    ],
    [
     "Tube",
     "silicone-tube-and-fittings",
     "silicone-tube-4x6-50",
     1,
     "keep it short"
    ],
    [
     "Mount",
     "t-slot-extrusions",
     "2020-100",
     1,
     "foot: 2 × M5 at 50 mm; frame at the rail's end so the flywheel hangs clear"
    ],
    [
     "Heat",
     "tea-light-candles",
     "tea-light-38x16",
     1,
     "under the hot barrel's tip end"
    ]
   ]
  }
 },
 "sheet_text": "Build list: Alpha V-twin, two 10 mL syringes — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/list-alpha-v-twin-syringe/  (CC BY 4.0)\nBasis: Every printed part is a free file on this site.\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Two syringes in a 90° V on one crank pin: the alpha with no displacer, checked so the pistons stay in and the rods clear.\n- Numbers: stroke 16 · rod 60 · 2.6 mL per cylinder · 90° phase from the V · Ø100 nut flywheel\n\nsubsystem  object  parts  qty  note\nFrame  alpha-v-twin-frame  alpha-frame-10ml  1  print on its back; both barrel axes pass through the crank axis\nCrank disc  alpha-v-twin-frame  alpha-crank-disc-s16  1  ONE pin: the 90° V gives the 90° phase\nCon-rods  alpha-v-twin-frame  alpha-conrod-60  2  60 mm so they clear the barrel walls\nPistons  syringe-pistons  syringe-piston-10ml-f008  2  replace the plungers; lap into the barrels, run dry\nCylinders  plastic-syringes  syringe-10ml  2  barrels only.\nCrankshaft  stirling-shafts-and-rods  crankshaft-5x80-dflat  1  print flat side down, 100 % infill\nBearings  ball-bearings-metric  bearing-625  2  both ends of the boss\nCrank pin  stirling-shafts-and-rods  pin-3x20  1  pressed 6 mm into the disc.\nSpacers  stirling-shafts-and-rods  spacer-5mm-t2, spacer-3mm-t1  1  2 mm boss-to-disc on the shaft; 1 mm disc-rod and rod-rod on the pin\nPin collar  shaft-collars-clips-and-shafts  collar-3mm  1  keeps rod 2 on the pin\nPiston pins  dowel-pins-metric  dowel-3x12  2  through each piston fork\nFlywheel  nut-weighted-flywheels  flywheel-100-m8-b5  1  behind the boss; 12 M8 nuts, remove until it still carries\nFlywheel weights  nut-weighted-flywheels  nut-m8  12  remove until it still carries\nTransfer  alpha-twin-crank-90  transfer-tee-4mm  1  between the syringe tips; regenerator plug of #100 mesh in the tee\nTube  silicone-tube-and-fittings  silicone-tube-4x6-50  1  keep it short\nMount  t-slot-extrusions  2020-100  1  foot: 2 × M5 at 50 mm; frame at the rail's end so the flywheel hangs clear\nHeat  tea-light-candles  tea-light-38x16  1  under the hot barrel's tip end\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Long Earth Society: Engine builds — web, video — LES site — https://longearthsociety.com/engineering/\n\nXem Studio scan: not planned; the official CAD above covers it.\nAPI: https://xemstudio.com/api/geometry?object=list-alpha-v-twin-syringe\n",
 "sources": [
  {
   "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": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "alpha-v-twin-frame",
  "syringe-pistons",
  "plastic-syringes",
  "stirling-shafts-and-rods",
  "ball-bearings-metric",
  "shaft-collars-clips-and-shafts",
  "dowel-pins-metric",
  "nut-weighted-flywheels",
  "alpha-twin-crank-90",
  "silicone-tube-and-fittings",
  "t-slot-extrusions",
  "tea-light-candles"
 ],
 "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 parts do I need to build an Alpha V-twin, two 10 mL syringes?",
   "a": "18 parts, every one a free STEP/STL on this site; see the table and the build order on this page."
  },
  {
   "q": "How do I download every STL for this build at once?",
   "a": "The stl-list.txt on this page lists every printed part's STL URL."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/list-alpha-v-twin-syringe/index.md"
}