{
 "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": "t-slot-gravity-roller-conveyor",
 "name": "Gravity roller conveyor on 15-series side frames: 1.9 in rollers, 7/16 hex axles, 3 in pitch",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Framing",
 "year": null,
 "question": "How do I build a roller conveyor from T-slot extrusion?",
 "tags": [
  "conveyor",
  "roller",
  "t-slot",
  "15 series",
  "workbench",
  "1515"
 ],
 "aliases": [
  "t slot roller conveyor",
  "gravity conveyor 1.9 roller"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 10,
 "url": "https://xemstudio.com/objects/t-slot-gravity-roller-conveyor/",
 "sheet_txt": "https://xemstudio.com/objects/t-slot-gravity-roller-conveyor/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design: Ø1.9 in rollers on 7/16 in hex axles (the common gravity-conveyor sizes) between two 1515 side frames, holes at a 3 in pitch on the rail centre line; legs from 1515 set the roller-top height",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Roller top = side-frame centre line + 0.95 in. Set leg length so that sits at your bench height."
  ],
  "table": {
   "columns": [
    "between_frames_in",
    "roller_in",
    "axle_hex_in",
    "pitch_in"
   ],
   "rows": [
    [
     18,
     1.9,
     0.4375,
     3
    ],
    [
     24,
     1.9,
     0.4375,
     3
    ],
    [
     30,
     1.9,
     0.4375,
     3
    ]
   ]
  }
 },
 "sheet_text": "Gravity roller conveyor on 15-series side frames: 1.9 in rollers, 7/16 hex axles, 3 in pitch — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/t-slot-gravity-roller-conveyor/  (CC BY 4.0)\nBasis: Xem Studio design: Ø1.9 in rollers on 7/16 in hex axles (the common gravity-conveyor sizes) between two 1515 side frames, holes at a 3 in pitch on the rail centre line; legs from 1515 set the roller-top height\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Roller top = side-frame centre line + 0.95 in. Set leg length so that sits at your bench height.\n\nbetween_frames_in  roller_in  axle_hex_in  pitch_in\n18  1.9  0.4375  3\n24  1.9  0.4375  3\n30  1.9  0.4375  3\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- 80/20: 15 series T-slot profiles and fasteners (1.5 in rail, 5/16-18 hardware) — web — maker's catalogue; numbers cited — https://8020.net/1515.html\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 10 parts): https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/index.json\nAPI: https://xemstudio.com/api/geometry?object=t-slot-gravity-roller-conveyor\n",
 "sources": [
  {
   "publisher": "80/20",
   "title": "15 series T-slot profiles and fasteners (1.5 in rail, 5/16-18 hardware)",
   "url": "https://8020.net/1515.html",
   "formats": [
    "web"
   ],
   "license": "maker's catalogue; numbers cited",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "1515-t-slot-extrusion-inch",
  "slide-in-t-nuts",
  "socket-head-cap-screws-inch",
  "button-head-socket-screws-inch",
  "t-slot-corner-brackets"
 ],
 "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": "Roller top height?",
   "a": "Side-frame centre line + 0.95 in."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "roller-1.9in-for-18in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/roller-1.9in-for-18in.step",
   "stl": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/roller-1.9in-for-18in.stl",
   "note": "Ø1.9 in roller, 18 in between frames, 1.65 wall, 7/16 hex bore"
  },
  {
   "file": "hex-axle-7-16in-for-18in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/hex-axle-7-16in-for-18in.step",
   "stl": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/hex-axle-7-16in-for-18in.stl",
   "note": "7/16 in hex axle, 21 in (through both 1515 side frames)"
  },
  {
   "file": "roller-1.9in-for-24in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/roller-1.9in-for-24in.step",
   "stl": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/roller-1.9in-for-24in.stl",
   "note": "Ø1.9 in roller, 24 in between frames, 1.65 wall, 7/16 hex bore"
  },
  {
   "file": "hex-axle-7-16in-for-24in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/hex-axle-7-16in-for-24in.step",
   "stl": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/hex-axle-7-16in-for-24in.stl",
   "note": "7/16 in hex axle, 27 in (through both 1515 side frames)"
  },
  {
   "file": "roller-1.9in-for-30in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/roller-1.9in-for-30in.step",
   "stl": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/roller-1.9in-for-30in.stl",
   "note": "Ø1.9 in roller, 30 in between frames, 1.65 wall, 7/16 hex bore"
  },
  {
   "file": "hex-axle-7-16in-for-30in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/hex-axle-7-16in-for-30in.step",
   "stl": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/hex-axle-7-16in-for-30in.stl",
   "note": "7/16 in hex axle, 33 in (through both 1515 side frames)"
  },
  {
   "file": "side-frame-drill-plate-24in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/side-frame-drill-plate-24in.step",
   "stl": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/side-frame-drill-plate-24in.stl",
   "note": "drill plate for a 24 in 1515 side frame: 8 hex holes at 3 in pitch on the centre line"
  },
  {
   "file": "side-frame-drill-plate-36in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/side-frame-drill-plate-36in.step",
   "stl": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/side-frame-drill-plate-36in.stl",
   "note": "drill plate for a 36 in 1515 side frame: 12 hex holes at 3 in pitch on the centre line"
  },
  {
   "file": "side-frame-drill-plate-48in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/side-frame-drill-plate-48in.step",
   "stl": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/side-frame-drill-plate-48in.stl",
   "note": "drill plate for a 48 in 1515 side frame: 16 hex holes at 3 in pitch on the centre line"
  },
  {
   "file": "side-frame-drill-plate-60in",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/side-frame-drill-plate-60in.step",
   "stl": "https://xemstudio.com/files/hardware/t-slot-gravity-roller-conveyor/side-frame-drill-plate-60in.stl",
   "note": "drill plate for a 60 in 1515 side frame: 20 hex holes at 3 in pitch on the centre line"
  }
 ],
 "markdown": "https://xemstudio.com/objects/t-slot-gravity-roller-conveyor/index.md"
}