{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "v-slot-extrusion-sizes",
 "name": "V-Slot extrusion: 20x20, 20x40, 20x60, 20x80 and C-Beam 40x80: slot width, centre bore, mass, section area, second moment",
 "kind": "standard",
 "category": "Hardware",
 "group": "Framing",
 "year": null,
 "question": "What are the slot width, centre hole and weight per metre of V-Slot 2020, 2040, 2060, 2080 and C-Beam?",
 "tags": [
  "v-slot",
  "vslot",
  "openbuilds",
  "extrusion",
  "20x20",
  "2020",
  "c-beam",
  "t-slot",
  "aluminium profile",
  "frame"
 ],
 "aliases": [
  "v slot 2020 dimensions",
  "v-slot 20x20 slot width",
  "openbuilds v-slot specs",
  "v slot 2040 weight per meter",
  "v-slot 2060 cross section area",
  "v slot extrusion centre hole 4.2",
  "c-beam 40x80 dimensions",
  "v-slot vs t-slot",
  "v slot 2080 moment of inertia",
  "v-slot m5 tap size"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": false,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/v-slot-extrusion-sizes/",
 "sheet_txt": "https://xemstudio.com/objects/v-slot-extrusion-sizes/sheet.txt",
 "sheet": {
  "basis": "Systeal's four V-Slot listings (mass, area, second moment, bore), Rat Rig and Electrokit listings (slot, alloy, tolerance), MakerTechStore for C-Beam; numbers only. No dimensioned cross-section drawing of a V-Slot profile was reachable, so no profile is drawn",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "V-Slot is a 20 mm-series aluminium extrusion whose slot has a V-shaped (rather than flat) wall so a V-wheel rides in it; it takes the same M5 and 6 mm-slot accessories as other 20-series extrusions. The pages 2020-, 2040-, 2060- and 2080-aluminum-extrusion on this site draw Misumi's flat-wall 6 mm-slot profile from its dimensioned drawing; this page adds the V-Slot numbers those pages do not have.",
   "Slot: Rat Rig's 20x20 and C-Beam pages print slot width 6 mm and slot depth 6 mm; Systeal calls all four sizes '6 mm slot (V-SLOT)'. Centre bore: Systeal prints 4.2 mm 'for M5 thread' on all four sizes and warns to check accessory compatibility. The V itself (opening angle, flat width, depth) is not printed by any page read, so it is not on this page.",
   "Mass, area and second moment are Systeal's own extrusion (EN AW-6063-T5, tolerance EN 755-9, cutting tolerance ±1 mm), not OpenBuilds'. Systeal prints the second moment as 'x axis' and 'y axis' in 10⁴ mm⁴ (20x20: 0.689 and 0.689; 20x40: 1.21 and 4.75; 20x60: 1.73 and 14.73; 20x80: 2.25 and 33.16), converted here to mm⁴; which axis lies along the long side is not stated on the listing, so the labels are as printed. Systeal's 20x20 listing prints 4 slots, 20x40 prints 6, 20x60 prints 8; the 20x80 listing does not print a slot count, so none is shown.",
   "Alloy and tolerance differ by seller: Systeal EN AW-6063-T5; Electrokit's Rat Rig HW203NRC 6060-T5 with a length tolerance of ±0.25 mm. Both are shown because they are different sellers' products; OpenBuilds' own product pages read for this page (20x20 linear rail) print only the name, price and cutting advice, with no dimensions.",
   "C-Beam: MakerTechStore calls it a 40 x 80 mm profile that takes all V-Slot parts; Rat Rig prints slot 6 x 6 mm. MakerTechStore's per-length weights (1 lb 2 oz / 2 lb 4 oz / 4 lb 4 oz for 250 / 500 / 1000 mm) do not scale to one mass per metre (4.5 against 4.25 lb/m), so no C-Beam mass is given.",
   "Not here: any outline, V-wall angle, cavity or web thickness, and the C-Beam's channel dimensions (none were printed in the pages read). McMaster-Carr lists T-slotted framing (6 mm to 10 mm slots and 20 to 160 mm rails) but no V-Slot, so its category is linked only as the nearest family."
  ],
  "table": {
   "columns": [
    "profile",
    "slots",
    "slot width × depth (mm)",
    "centre bore (mm)",
    "mass (kg/m, Systeal)",
    "area (mm², Systeal)",
    "second moment mm⁴ (Systeal, as printed)"
   ],
   "rows": [
    [
     "20x20",
     "4",
     "6 × 6 (Rat Rig)",
     "4.2 (M5 tap)",
     "0.456",
     "169",
     "6 890 (x), 6 890 (y)"
    ],
    [
     "20x40",
     "6",
     "6",
     "4.2 (M5 tap)",
     "0.799",
     "296",
     "12 100 (x), 47 500 (y)"
    ],
    [
     "20x60",
     "8",
     "6",
     "4.2 (M5 tap)",
     "1.14",
     "423",
     "17 300 (x), 147 300 (y)"
    ],
    [
     "20x80",
     "not printed",
     "6",
     "4.2 (M5 tap)",
     "1.48",
     "549",
     "22 500 (x), 331 600 (y)"
    ],
    [
     "C-Beam 40x80",
     "—",
     "6 × 6 (Rat Rig)",
     "—",
     "—",
     "—",
     "—"
    ]
   ]
  }
 },
 "sheet_text": "V-Slot extrusion: 20x20, 20x40, 20x60, 20x80 and C-Beam 40x80: slot width, centre bore, mass, section area, second moment — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/v-slot-extrusion-sizes/  (sheet CC BY 4.0)\nBasis: Systeal's four V-Slot listings (mass, area, second moment, bore), Rat Rig and Electrokit listings (slot, alloy, tolerance), MakerTechStore for C-Beam; numbers only. No dimensioned cross-section drawing of a V-Slot profile was reachable, so no profile is drawn\nCatalog version: 2026-10-20\n\nSizes: see table below\n- V-Slot is a 20 mm-series aluminium extrusion whose slot has a V-shaped (rather than flat) wall so a V-wheel rides in it; it takes the same M5 and 6 mm-slot accessories as other 20-series extrusions. The pages 2020-, 2040-, 2060- and 2080-aluminum-extrusion on this site draw Misumi's flat-wall 6 mm-slot profile from its dimensioned drawing; this page adds the V-Slot numbers those pages do not have.\n- Slot: Rat Rig's 20x20 and C-Beam pages print slot width 6 mm and slot depth 6 mm; Systeal calls all four sizes '6 mm slot (V-SLOT)'. Centre bore: Systeal prints 4.2 mm 'for M5 thread' on all four sizes and warns to check accessory compatibility. The V itself (opening angle, flat width, depth) is not printed by any page read, so it is not on this page.\n- Mass, area and second moment are Systeal's own extrusion (EN AW-6063-T5, tolerance EN 755-9, cutting tolerance ±1 mm), not OpenBuilds'. Systeal prints the second moment as 'x axis' and 'y axis' in 10⁴ mm⁴ (20x20: 0.689 and 0.689; 20x40: 1.21 and 4.75; 20x60: 1.73 and 14.73; 20x80: 2.25 and 33.16), converted here to mm⁴; which axis lies along the long side is not stated on the listing, so the labels are as printed. Systeal's 20x20 listing prints 4 slots, 20x40 prints 6, 20x60 prints 8; the 20x80 listing does not print a slot count, so none is shown.\n- Alloy and tolerance differ by seller: Systeal EN AW-6063-T5; Electrokit's Rat Rig HW203NRC 6060-T5 with a length tolerance of ±0.25 mm. Both are shown because they are different sellers' products; OpenBuilds' own product pages read for this page (20x20 linear rail) print only the name, price and cutting advice, with no dimensions.\n- C-Beam: MakerTechStore calls it a 40 x 80 mm profile that takes all V-Slot parts; Rat Rig prints slot 6 x 6 mm. MakerTechStore's per-length weights (1 lb 2 oz / 2 lb 4 oz / 4 lb 4 oz for 250 / 500 / 1000 mm) do not scale to one mass per metre (4.5 against 4.25 lb/m), so no C-Beam mass is given.\n- Not here: any outline, V-wall angle, cavity or web thickness, and the C-Beam's channel dimensions (none were printed in the pages read). McMaster-Carr lists T-slotted framing (6 mm to 10 mm slots and 20 to 160 mm rails) but no V-Slot, so its category is linked only as the nearest family.\n\nprofile  slots  slot width × depth (mm)  centre bore (mm)  mass (kg/m, Systeal)  area (mm², Systeal)  second moment mm⁴ (Systeal, as printed)\n20x20  4  6 × 6 (Rat Rig)  4.2 (M5 tap)  0.456  169  6 890 (x), 6 890 (y)\n20x40  6  6  4.2 (M5 tap)  0.799  296  12 100 (x), 47 500 (y)\n20x60  8  6  4.2 (M5 tap)  1.14  423  17 300 (x), 147 300 (y)\n20x80  not printed  6  4.2 (M5 tap)  1.48  549  22 500 (x), 331 600 (y)\nC-Beam 40x80  —  6 × 6 (Rat Rig)  —  —  —  —\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Systeal: V-SLOT aluminium profile 20x20 6 mm slot: 169 mm², 0.456 kg/m, centre hole 4.2 mm, EN AW-6063-T5, EN 755-9 — web — Maker listing; numbers only — https://www.systeal.com/en/profiles-20-series/1469-v-slot-aluminium-profile-20x20-6mm-slot-black-anodized.html\n- Systeal: V-SLOT aluminium profile 20x40 6 mm slot: 296 mm², 0.799 kg/m, 6 slots, centre hole 4.2 mm — web — Maker listing; numbers only — https://www.systeal.com/en/profiles-20-series/1543-v-slot-aluminium-profile-20x40-6mm-slot-black-anodized.html\n- Systeal: V-SLOT aluminium profile 20x60 6 mm slot: 423 mm², 1.14 kg/m, 8 slots, centre hole 4.2 mm — web — Maker listing; numbers only — https://www.systeal.com/en/profiles-20-series/1578-v-slot-aluminium-profile-20x60-6mm-slot-black-anodized.html\n- Systeal: V-SLOT aluminium profile 20x80 6 mm slot: 549 mm², 1.48 kg/m, centre hole 4.2 mm — web — Maker listing; numbers only — https://www.systeal.com/en/profiles-20-series/1579-v-slot-aluminium-profile-20x80-6mm-slot-black-anodized.html\n- Rat Rig: V-Slot 2020: profile 20x20 mm, slot width 6 mm, slot depth 6 mm — web — Retailer page; numbers only — https://ratrig.com/products/v-slot-2020-standard\n- Electrokit (Rat Rig HW203NRC): V-SLOT 2020 natural anodized 500 mm: 6060-T5, length tolerance ±0.25 mm, M5 tap, slot 6 x 6 mm — web — Retailer page; numbers only — https://www.electrokit.com/en/v-slot-2020-natural-anodized-500mm\n- Rat Rig: C-Beam: profile 40x80 mm, slot width 6 mm, slot depth 6 mm — web — Retailer page; numbers only — https://www.ratrig.com/c-beam.html\n- MakerTechStore: C-Beam Linear Rail: considered a 40 mm x 80 mm profile, compatible with all V-Slot parts — web — Retailer page; numbers only — https://www.makertechstore.com/products/c-beam-linear-rail\n- McMaster-Carr: T-slotted framing (McMaster lists no V-Slot profile or V-wheel; this is the nearest family) (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/t-slotted-framing/\n\nNo true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.\nAPI: https://xemstudio.com/api/geometry?object=v-slot-extrusion-sizes\n",
 "sources": [
  {
   "publisher": "Systeal",
   "title": "V-SLOT aluminium profile 20x20 6 mm slot: 169 mm², 0.456 kg/m, centre hole 4.2 mm, EN AW-6063-T5, EN 755-9",
   "url": "https://www.systeal.com/en/profiles-20-series/1469-v-slot-aluminium-profile-20x20-6mm-slot-black-anodized.html",
   "formats": [
    "web"
   ],
   "license": "Maker listing; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Systeal",
   "title": "V-SLOT aluminium profile 20x40 6 mm slot: 296 mm², 0.799 kg/m, 6 slots, centre hole 4.2 mm",
   "url": "https://www.systeal.com/en/profiles-20-series/1543-v-slot-aluminium-profile-20x40-6mm-slot-black-anodized.html",
   "formats": [
    "web"
   ],
   "license": "Maker listing; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Systeal",
   "title": "V-SLOT aluminium profile 20x60 6 mm slot: 423 mm², 1.14 kg/m, 8 slots, centre hole 4.2 mm",
   "url": "https://www.systeal.com/en/profiles-20-series/1578-v-slot-aluminium-profile-20x60-6mm-slot-black-anodized.html",
   "formats": [
    "web"
   ],
   "license": "Maker listing; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Systeal",
   "title": "V-SLOT aluminium profile 20x80 6 mm slot: 549 mm², 1.48 kg/m, centre hole 4.2 mm",
   "url": "https://www.systeal.com/en/profiles-20-series/1579-v-slot-aluminium-profile-20x80-6mm-slot-black-anodized.html",
   "formats": [
    "web"
   ],
   "license": "Maker listing; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Rat Rig",
   "title": "V-Slot 2020: profile 20x20 mm, slot width 6 mm, slot depth 6 mm",
   "url": "https://ratrig.com/products/v-slot-2020-standard",
   "formats": [
    "web"
   ],
   "license": "Retailer page; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Electrokit (Rat Rig HW203NRC)",
   "title": "V-SLOT 2020 natural anodized 500 mm: 6060-T5, length tolerance ±0.25 mm, M5 tap, slot 6 x 6 mm",
   "url": "https://www.electrokit.com/en/v-slot-2020-natural-anodized-500mm",
   "formats": [
    "web"
   ],
   "license": "Retailer page; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Rat Rig",
   "title": "C-Beam: profile 40x80 mm, slot width 6 mm, slot depth 6 mm",
   "url": "https://www.ratrig.com/c-beam.html",
   "formats": [
    "web"
   ],
   "license": "Retailer page; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "MakerTechStore",
   "title": "C-Beam Linear Rail: considered a 40 mm x 80 mm profile, compatible with all V-Slot parts",
   "url": "https://www.makertechstore.com/products/c-beam-linear-rail",
   "formats": [
    "web"
   ],
   "license": "Retailer page; numbers only",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "T-slotted framing (McMaster lists no V-Slot profile or V-wheel; this is the nearest family) (free STEP/IGES per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/products/t-slotted-framing/",
   "formats": [
    "STEP",
    "IGES",
    "PDF"
   ],
   "license": "McMaster-Carr site terms: personal design use, no redistribution",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "2020-aluminum-extrusion",
  "2040-aluminum-extrusion",
  "2060-aluminum-extrusion",
  "2080-aluminum-extrusion",
  "slide-in-t-nuts",
  "v-slot-wheels-eccentric-spacers",
  "pillow-block-kp08",
  "t-slot-end-caps"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no tolerance added)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no tolerance added. 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. Typical accuracy by process and ISO 286 fits: https://xemstudio.com/tolerances/",
 "mating": [],
 "faq": [
  {
   "q": "What is the centre hole in V-Slot 2020?",
   "a": "4.2 mm, for an M5 thread, on Systeal's 20x20, 20x40, 20x60 and 20x80."
  },
  {
   "q": "How heavy is V-Slot 2040?",
   "a": "0.799 kg/m with a 296 mm² section on Systeal's listing; other sellers' extrusions differ."
  },
  {
   "q": "What size is a C-Beam?",
   "a": "40 x 80 mm with a 6 x 6 mm slot per Rat Rig; it takes all V-Slot accessories per MakerTechStore."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/v-slot-extrusion-sizes/index.md"
}