{
 "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": "taper-lock-bushings-1008-to-5050",
 "name": "Taper-Lock bushings 1008 to 5050: bore range, length through bore, set screw and cap screw sizes",
 "kind": "standard",
 "category": "Hardware",
 "group": "Bearings, rails & motion",
 "year": null,
 "question": "What are the dimensions of a Taper-Lock bushing (1008, 1108, 1210, 1610, 2012, 2517, 3020 and so on): bore range, length and screw size?",
 "tags": [
  "taper-lock",
  "taper lock bushing",
  "taper bushing",
  "1008",
  "1108",
  "1210",
  "1610",
  "2012",
  "2517",
  "3020",
  "bushing",
  "sprocket hub",
  "standard"
 ],
 "aliases": [
  "taper lock bushing sizes",
  "1210 taper lock bushing dimensions",
  "1008 taper lock bore range",
  "1610 taper bushing bore",
  "2012 taper lock bore",
  "3020 taper lock bushing",
  "taper lock 2517 length",
  "taper lock bushing chart",
  "taper bushing screw size",
  "taper lock set screw size 1108",
  "taper lock bushing bore range chart",
  "taper lock vs qd bushing",
  "tl bushing length"
 ],
 "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/taper-lock-bushings-1008-to-5050/",
 "sheet_txt": "https://xemstudio.com/objects/taper-lock-bushings-1008-to-5050/sheet.txt",
 "sheet": {
  "basis": "A-Metric Taper-Lock table (bore ranges, length, screws), length and 1008 to 1310 bore ranges confirmed by Tsubaki, 1108 by Martin's sheet; partial by design",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Taper-Lock (A-Metric, Tsubaki) or taper bushing (Martin) is a split tapered bushing that clamps a hub to a shaft; the table lists the sizes from 1008 to 5050. The bushing number is the style (1008, 1108, 1210 ... 5050); a hub or sprocket 'for 1210' fits any bore the 1210 bushing is cut to.",
   "Table: length through bore L and screw sizes from A-Metric's Taper-Lock page (inch group), bore ranges from the same page (metric group). L of the first five bushings equals the B column of Tsubaki's table (7/8, 7/8, 1, 1-1/2, 1 in; Tsubaki does not label the column), whose inch bore ranges (0.500 to 1.000, 1.125, 1.250, 1.250, 1.375 in for 1008 to 1310) are also used. Martin's 1108 sheet agrees on the 0.500 to 1.125 in range and on two 1/4-20 × 1/2 set screws tightened to 55 in-lb. Bores outside the table's range are special.",
   "Metric bore range note: A-Metric's metric group lists 2517 and 2525 as 'BSW' versions with the screw sizes in the inch rows differing slightly from the ANSI ones, and shows 3525 to 5050 with socket-head cap screws. The ranges are one maker's list; check the catalogue for the exact bore and keyway.",
   "Left out: flange diameter and bolt circle. Tsubaki and Martin print columns A and D (A 1.386 / 1.511 / 1.875 / 1.875 / 2.000 in and D 1.328 / 1.453 / 1.750 / 1.750 / 1.875 in for 1008 to 1310) but the pages read do not say which is which, so neither is shown; do not use them for a pocket. The tapered outside diameter, the taper, keyway sizes (only Martin's 1108 table was read) and weights are not tabulated.",
   "No files: the tapered outside diameter and the split are not published in the tables read, so a bushing file would be invented. For a hub drawing, take the dimensions from the maker's CAD or catalogue (links below).",
   "Keys: bushings use parallel keys; sizes are on the parallel-keys-din-6885 and square-keys-inch pages."
  ],
  "table": {
   "columns": [
    "bushing",
    "length through bore L, in (mm)",
    "inch bore range, in",
    "metric bore range, mm",
    "screws per bushing (A-Metric: qty × size)"
   ],
   "rows": [
    [
     "1008",
     "0.875 (22.2)",
     "0.500 to 1.000",
     "11 to 25",
     "2 × 1/4-20 × 1/2 set"
    ],
    [
     "1108",
     "0.875 (22.2)",
     "0.500 to 1.125",
     "11 to 28",
     "2 × 1/4-20 × 1/2 set"
    ],
    [
     "1210",
     "1 (25.4)",
     "0.500 to 1.250",
     "11 to 32",
     "2 × 3/8-16 × 5/8 set"
    ],
    [
     "1215",
     "1.5 (38.1)",
     "0.500 to 1.250",
     "14 to 32",
     "2 × 3/8-16 × 5/8 set"
    ],
    [
     "1310",
     "1 (25.4)",
     "0.500 to 1.375",
     "14 to 35",
     "2 × 3/8-16 × 5/8 set"
    ],
    [
     "1610",
     "1 (25.4)",
     "—",
     "12 to 42",
     "2 × 3/8-16 × 5/8 set"
    ],
    [
     "1615",
     "1.5 (38.1)",
     "—",
     "14 to 42",
     "2 × 3/8-16 × 5/8 set"
    ],
    [
     "2012",
     "1.25 (31.8)",
     "—",
     "15 to 50",
     "2 × 7/16-14 × 7/8 set"
    ],
    [
     "2517",
     "1.75 (44.4)",
     "—",
     "18 to 65",
     "2 × 1/2-12 × 1 set"
    ],
    [
     "2525",
     "2.5 (63.5)",
     "—",
     "20 to 60",
     "2 × 1/2-12 × 1 set"
    ],
    [
     "3020",
     "2 (50.8)",
     "—",
     "25 to 75",
     "2 × 5/8-11 × 1-1/4 set"
    ],
    [
     "3030",
     "3 (76.2)",
     "—",
     "35 to 75",
     "2 × 5/8-11 × 1-1/4 set"
    ],
    [
     "3525",
     "2.5 (63.5)",
     "—",
     "35 to 90",
     "2 × 1/2 × 1-1/2 socket head cap"
    ],
    [
     "3535",
     "3.5 (88.9)",
     "—",
     "35 to 90",
     "2 × 5/8 × 1-3/4 socket head cap"
    ],
    [
     "4030",
     "4 (101.6)",
     "—",
     "48 to 100",
     "2 × 5/8 × 1-3/4 socket head cap"
    ],
    [
     "4040",
     "4 (101.6)",
     "—",
     "48 to 100",
     "2 × 3/4 × 2 socket head cap"
    ],
    [
     "4545",
     "4.5 (114.3)",
     "—",
     "55 to 110",
     "2 × 7/8 × 2-1/4 socket head cap"
    ],
    [
     "5050",
     "5 (127.0)",
     "—",
     "70 to 125",
     "2 × 7/8 × 2-1/4 socket head cap"
    ]
   ]
  }
 },
 "sheet_text": "Taper-Lock bushings 1008 to 5050: bore range, length through bore, set screw and cap screw sizes — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/taper-lock-bushings-1008-to-5050/  (sheet CC BY 4.0)\nBasis: A-Metric Taper-Lock table (bore ranges, length, screws), length and 1008 to 1310 bore ranges confirmed by Tsubaki, 1108 by Martin's sheet; partial by design\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Taper-Lock (A-Metric, Tsubaki) or taper bushing (Martin) is a split tapered bushing that clamps a hub to a shaft; the table lists the sizes from 1008 to 5050. The bushing number is the style (1008, 1108, 1210 ... 5050); a hub or sprocket 'for 1210' fits any bore the 1210 bushing is cut to.\n- Table: length through bore L and screw sizes from A-Metric's Taper-Lock page (inch group), bore ranges from the same page (metric group). L of the first five bushings equals the B column of Tsubaki's table (7/8, 7/8, 1, 1-1/2, 1 in; Tsubaki does not label the column), whose inch bore ranges (0.500 to 1.000, 1.125, 1.250, 1.250, 1.375 in for 1008 to 1310) are also used. Martin's 1108 sheet agrees on the 0.500 to 1.125 in range and on two 1/4-20 × 1/2 set screws tightened to 55 in-lb. Bores outside the table's range are special.\n- Metric bore range note: A-Metric's metric group lists 2517 and 2525 as 'BSW' versions with the screw sizes in the inch rows differing slightly from the ANSI ones, and shows 3525 to 5050 with socket-head cap screws. The ranges are one maker's list; check the catalogue for the exact bore and keyway.\n- Left out: flange diameter and bolt circle. Tsubaki and Martin print columns A and D (A 1.386 / 1.511 / 1.875 / 1.875 / 2.000 in and D 1.328 / 1.453 / 1.750 / 1.750 / 1.875 in for 1008 to 1310) but the pages read do not say which is which, so neither is shown; do not use them for a pocket. The tapered outside diameter, the taper, keyway sizes (only Martin's 1108 table was read) and weights are not tabulated.\n- No files: the tapered outside diameter and the split are not published in the tables read, so a bushing file would be invented. For a hub drawing, take the dimensions from the maker's CAD or catalogue (links below).\n- Keys: bushings use parallel keys; sizes are on the parallel-keys-din-6885 and square-keys-inch pages.\n\nbushing  length through bore L, in (mm)  inch bore range, in  metric bore range, mm  screws per bushing (A-Metric: qty × size)\n1008  0.875 (22.2)  0.500 to 1.000  11 to 25  2 × 1/4-20 × 1/2 set\n1108  0.875 (22.2)  0.500 to 1.125  11 to 28  2 × 1/4-20 × 1/2 set\n1210  1 (25.4)  0.500 to 1.250  11 to 32  2 × 3/8-16 × 5/8 set\n1215  1.5 (38.1)  0.500 to 1.250  14 to 32  2 × 3/8-16 × 5/8 set\n1310  1 (25.4)  0.500 to 1.375  14 to 35  2 × 3/8-16 × 5/8 set\n1610  1 (25.4)  —  12 to 42  2 × 3/8-16 × 5/8 set\n1615  1.5 (38.1)  —  14 to 42  2 × 3/8-16 × 5/8 set\n2012  1.25 (31.8)  —  15 to 50  2 × 7/16-14 × 7/8 set\n2517  1.75 (44.4)  —  18 to 65  2 × 1/2-12 × 1 set\n2525  2.5 (63.5)  —  20 to 60  2 × 1/2-12 × 1 set\n3020  2 (50.8)  —  25 to 75  2 × 5/8-11 × 1-1/4 set\n3030  3 (76.2)  —  35 to 75  2 × 5/8-11 × 1-1/4 set\n3525  2.5 (63.5)  —  35 to 90  2 × 1/2 × 1-1/2 socket head cap\n3535  3.5 (88.9)  —  35 to 90  2 × 5/8 × 1-3/4 socket head cap\n4030  4 (101.6)  —  48 to 100  2 × 5/8 × 1-3/4 socket head cap\n4040  4 (101.6)  —  48 to 100  2 × 3/4 × 2 socket head cap\n4545  4.5 (114.3)  —  55 to 110  2 × 7/8 × 2-1/4 socket head cap\n5050  5 (127.0)  —  70 to 125  2 × 7/8 × 2-1/4 socket head cap\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- A-Metric: Taper-Lock type bushings: bore ranges (metric and inch), length through bore, set screw and cap screw sizes — web — Publisher's page; dimensions are facts — https://www.ametric.com/Images/document/Bushings-TaperLockType.pdf\n- Tsubaki: TAPER-LOCK bushings 1008 to 1310 (dimension columns A, B, D, F2 and inch bore range) — web — Publisher's page; dimensions are facts — https://catalog.tsubaki.ca/sl/compare/taper-lock-bushings/taper-lock-bushings-1008-through-3030\n- Martin Sprocket (via Raptor Supplies data sheet): Taper bushing 1108: bore ranges, keyways, 1/4-20 × 1/2 set screws (2), 55 in-lb — web — Publisher's page; dimensions are facts — https://static.raptorsupplies.com/catalog/product/datasheet/martin-sprocket-1108-11-16.pdf\n- Tsubaki (US): Roller chain, sprockets and TAPER-LOCK bushings: maker catalogue with CAD downloads — web — Publisher's page; dimensions are facts — https://www.tsubaki.com/\n- Martin Sprocket: Martin Sprocket & Gear CAD library (sprockets, QD and taper bushings) — web — Publisher's page; dimensions are facts — https://www.martinsprocket.com/\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=taper-lock-bushings-1008-to-5050\n",
 "sources": [
  {
   "publisher": "A-Metric",
   "title": "Taper-Lock type bushings: bore ranges (metric and inch), length through bore, set screw and cap screw sizes",
   "url": "https://www.ametric.com/Images/document/Bushings-TaperLockType.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Tsubaki",
   "title": "TAPER-LOCK bushings 1008 to 1310 (dimension columns A, B, D, F2 and inch bore range)",
   "url": "https://catalog.tsubaki.ca/sl/compare/taper-lock-bushings/taper-lock-bushings-1008-through-3030",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Martin Sprocket (via Raptor Supplies data sheet)",
   "title": "Taper bushing 1108: bore ranges, keyways, 1/4-20 × 1/2 set screws (2), 55 in-lb",
   "url": "https://static.raptorsupplies.com/catalog/product/datasheet/martin-sprocket-1108-11-16.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Tsubaki (US)",
   "title": "Roller chain, sprockets and TAPER-LOCK bushings: maker catalogue with CAD downloads",
   "url": "https://www.tsubaki.com/",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Martin Sprocket",
   "title": "Martin Sprocket & Gear CAD library (sprockets, QD and taper bushings)",
   "url": "https://www.martinsprocket.com/",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "qd-bushings-sh-sds-sd",
  "roller-chain-sprocket-dimensions-ansi",
  "parallel-keys-din-6885",
  "square-keys-inch",
  "v-belt-pulley-grooves-iso-4183-narrow",
  "metric-shafts",
  "shaft-couplers"
 ],
 "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": [
  {
   "feature": "keyway",
   "exact": "parallel key per bushing bore (Martin 1108 sheet: 1/8 × 1/16 to 1/4 × 1/8 in by bore)",
   "mates": "parallel key on parallel-keys-din-6885 / square-keys-inch",
   "fit": "slide",
   "files": "all"
  },
  {
   "feature": "set / cap screws",
   "exact": "2 per bushing: 1/4-20 × 1/2 (1008, 1108) to 7/8 × 2-1/4 (4545, 5050)",
   "mates": "hub tapped holes of the same thread (see socket-head-cap-screws-inch)",
   "fit": "designed",
   "files": "all"
  }
 ],
 "fit_classes": {
  "press": "stays put: pin, tube, bearing or magnet held by interference. ISO 286 equivalent: H7/p6 (locational interference) or tighter.",
  "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. ISO 286 equivalent: H7/g6 or H7/h6.",
  "run": "turns or slides in use: pin in a link, rod through a guide. ISO 286 equivalent: H8/f7 (close running).",
  "socket": "large sliding fit: syringe barrel, sleeve, bobbin in a bore. ISO 286 equivalent: H9/d9 (free running) or looser.",
  "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 is the length of a 1210 Taper-Lock bushing?",
   "a": "1 in (25.4 mm) through the bore; the 1215 is 1-1/2 in. It takes 0.500 to 1.250 in bores and two 3/8-16 × 5/8 set screws."
  },
  {
   "q": "What bore range does a 1108 Taper-Lock bushing cover?",
   "a": "0.500 to 1.125 in (A-Metric, Tsubaki and Martin's sheet agree); metric 11 to 28 mm."
  },
  {
   "q": "What is the difference between Taper-Lock and QD bushings?",
   "a": "Both are split tapered bushings sized by a letter / number code. The QD (quick-disconnect) bushings in Martin's table use three cap screws on a bolt circle; the Taper-Lock bushings here use two set or cap screws. QD sizes are on the QD bushing page."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/taper-lock-bushings-1008-to-5050/index.md"
}