{ "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": "acetal-delrin-rod-diameters", "name": "Acetal (Delrin) rod diameters: 1/8 to 2 in and 4 to 250 mm nominal sizes", "kind": "standard", "category": "Hardware", "group": "Materials & stock", "year": null, "question": "What diameters does acetal (Delrin) round rod come in, in inches and millimetres?", "tags": [ "acetal", "delrin", "pom", "rod", "plastic rod", "round stock", "plastic stock", "tool" ], "aliases": [ "delrin rod sizes", "acetal rod diameters", "delrin rod 1 inch", "delrin rod 10mm", "pom rod sizes", "acetal rod 25mm", "delrin round stock", "acetal rod standard sizes mm", "delrin rod 3/4", "delrin rod 1/2 inch", "plastic rod diameters" ], "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/acetal-delrin-rod-diameters/", "sheet_txt": "https://xemstudio.com/objects/acetal-delrin-rod-diameters/sheet.txt", "sheet": { "basis": "Aircraft Spruce Delrin rod list (inch) and Bearing Boys Delrin rod tolerance table (metric nominal diameters); McMaster-Carr linked", "overall_mm": { "length": null, "width": null, "height": null }, "notes": [ "Acetal (POM, Delrin is DuPont's trade name) round rod is sold in inch diameters in the US (Aircraft Spruce lists 1/8 to 2 in: 1/8, 5/16, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1-3/8, 1-1/2, 2 in) and in metric nominal diameters in Europe (Bearing Boys' table: 4 to 250 mm in 39 sizes). Rods are cut oversize so a part can be machined to size: Bearing Boys prints an oversize tolerance per diameter, which was not extracted here, so the table gives nominal diameters only.", "Two sources do not overlap in size, so nothing here is cross-checked between them; each list is as printed. Bearing Boys' text says rods are available from 10 to 200 mm but its tolerance table runs 4 to 250 mm; both are noted rather than resolved. The inch column of the metric list (mm / 25.4) is a conversion, not catalog data.", "No STEP/STL: a rod is a plain cylinder. Left out: rod lengths, colours (white / black), copolymer vs homopolymer grade, nylon, HDPE, UHMW and PTFE rod and sheet (the task listed them; no distributor table of their sizes was read in this pass)." ], "table": { "columns": [ "nominal diameter", "mm", "source" ], "rows": [ [ "1/8 in", "3.17", "Aircraft Spruce (inch)" ], [ "5/16 in", "7.94", "Aircraft Spruce (inch)" ], [ "3/8 in", "9.52", "Aircraft Spruce (inch)" ], [ "1/2 in", "12.70", "Aircraft Spruce (inch)" ], [ "5/8 in", "15.88", "Aircraft Spruce (inch)" ], [ "3/4 in", "19.05", "Aircraft Spruce (inch)" ], [ "7/8 in", "22.22", "Aircraft Spruce (inch)" ], [ "1 in", "25.40", "Aircraft Spruce (inch)" ], [ "1-3/8 in", "34.92", "Aircraft Spruce (inch)" ], [ "1-1/2 in", "38.10", "Aircraft Spruce (inch)" ], [ "2 in", "50.80", "Aircraft Spruce (inch)" ], [ "0.157 in", "4", "Bearing Boys (metric)" ], [ "0.197 in", "5", "Bearing Boys (metric)" ], [ "0.236 in", "6", "Bearing Boys (metric)" ], [ "0.315 in", "8", "Bearing Boys (metric)" ], [ "0.394 in", "10", "Bearing Boys (metric)" ], [ "0.472 in", "12", "Bearing Boys (metric)" ], [ "0.551 in", "14", "Bearing Boys (metric)" ], [ "0.630 in", "16", "Bearing Boys (metric)" ], [ "0.709 in", "18", "Bearing Boys (metric)" ], [ "0.787 in", "20", "Bearing Boys (metric)" ], [ "0.866 in", "22", "Bearing Boys (metric)" ], [ "0.984 in", "25", "Bearing Boys (metric)" ], [ "1.102 in", "28", "Bearing Boys (metric)" ], [ "1.181 in", "30", "Bearing Boys (metric)" ], [ "1.260 in", "32", "Bearing Boys (metric)" ], [ "1.417 in", "36", "Bearing Boys (metric)" ], [ "1.575 in", "40", "Bearing Boys (metric)" ], [ "1.772 in", "45", "Bearing Boys (metric)" ], [ "1.969 in", "50", "Bearing Boys (metric)" ], [ "2.205 in", "56", "Bearing Boys (metric)" ], [ "2.362 in", "60", "Bearing Boys (metric)" ], [ "2.559 in", "65", "Bearing Boys (metric)" ], [ "2.756 in", "70", "Bearing Boys (metric)" ], [ "2.953 in", "75", "Bearing Boys (metric)" ], [ "3.150 in", "80", "Bearing Boys (metric)" ], [ "3.543 in", "90", "Bearing Boys (metric)" ], [ "3.937 in", "100", "Bearing Boys (metric)" ], [ "4.331 in", "110", "Bearing Boys (metric)" ], [ "4.724 in", "120", "Bearing Boys (metric)" ], [ "4.921 in", "125", "Bearing Boys (metric)" ], [ "5.118 in", "130", "Bearing Boys (metric)" ], [ "5.315 in", "135", "Bearing Boys (metric)" ], [ "5.512 in", "140", "Bearing Boys (metric)" ], [ "5.906 in", "150", "Bearing Boys (metric)" ], [ "6.496 in", "165", "Bearing Boys (metric)" ], [ "7.087 in", "180", "Bearing Boys (metric)" ], [ "7.874 in", "200", "Bearing Boys (metric)" ], [ "9.055 in", "230", "Bearing Boys (metric)" ], [ "9.843 in", "250", "Bearing Boys (metric)" ] ] } }, "sheet_text": "Acetal (Delrin) rod diameters: 1/8 to 2 in and 4 to 250 mm nominal sizes — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/acetal-delrin-rod-diameters/ (sheet CC BY 4.0)\nBasis: Aircraft Spruce Delrin rod list (inch) and Bearing Boys Delrin rod tolerance table (metric nominal diameters); McMaster-Carr linked\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Acetal (POM, Delrin is DuPont's trade name) round rod is sold in inch diameters in the US (Aircraft Spruce lists 1/8 to 2 in: 1/8, 5/16, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1-3/8, 1-1/2, 2 in) and in metric nominal diameters in Europe (Bearing Boys' table: 4 to 250 mm in 39 sizes). Rods are cut oversize so a part can be machined to size: Bearing Boys prints an oversize tolerance per diameter, which was not extracted here, so the table gives nominal diameters only.\n- Two sources do not overlap in size, so nothing here is cross-checked between them; each list is as printed. Bearing Boys' text says rods are available from 10 to 200 mm but its tolerance table runs 4 to 250 mm; both are noted rather than resolved. The inch column of the metric list (mm / 25.4) is a conversion, not catalog data.\n- No STEP/STL: a rod is a plain cylinder. Left out: rod lengths, colours (white / black), copolymer vs homopolymer grade, nylon, HDPE, UHMW and PTFE rod and sheet (the task listed them; no distributor table of their sizes was read in this pass).\n\nnominal diameter mm source\n1/8 in 3.17 Aircraft Spruce (inch)\n5/16 in 7.94 Aircraft Spruce (inch)\n3/8 in 9.52 Aircraft Spruce (inch)\n1/2 in 12.70 Aircraft Spruce (inch)\n5/8 in 15.88 Aircraft Spruce (inch)\n3/4 in 19.05 Aircraft Spruce (inch)\n7/8 in 22.22 Aircraft Spruce (inch)\n1 in 25.40 Aircraft Spruce (inch)\n1-3/8 in 34.92 Aircraft Spruce (inch)\n1-1/2 in 38.10 Aircraft Spruce (inch)\n2 in 50.80 Aircraft Spruce (inch)\n0.157 in 4 Bearing Boys (metric)\n0.197 in 5 Bearing Boys (metric)\n0.236 in 6 Bearing Boys (metric)\n0.315 in 8 Bearing Boys (metric)\n0.394 in 10 Bearing Boys (metric)\n0.472 in 12 Bearing Boys (metric)\n0.551 in 14 Bearing Boys (metric)\n0.630 in 16 Bearing Boys (metric)\n0.709 in 18 Bearing Boys (metric)\n0.787 in 20 Bearing Boys (metric)\n0.866 in 22 Bearing Boys (metric)\n0.984 in 25 Bearing Boys (metric)\n1.102 in 28 Bearing Boys (metric)\n1.181 in 30 Bearing Boys (metric)\n1.260 in 32 Bearing Boys (metric)\n1.417 in 36 Bearing Boys (metric)\n1.575 in 40 Bearing Boys (metric)\n1.772 in 45 Bearing Boys (metric)\n1.969 in 50 Bearing Boys (metric)\n2.205 in 56 Bearing Boys (metric)\n2.362 in 60 Bearing Boys (metric)\n2.559 in 65 Bearing Boys (metric)\n2.756 in 70 Bearing Boys (metric)\n2.953 in 75 Bearing Boys (metric)\n3.150 in 80 Bearing Boys (metric)\n3.543 in 90 Bearing Boys (metric)\n3.937 in 100 Bearing Boys (metric)\n4.331 in 110 Bearing Boys (metric)\n4.724 in 120 Bearing Boys (metric)\n4.921 in 125 Bearing Boys (metric)\n5.118 in 130 Bearing Boys (metric)\n5.315 in 135 Bearing Boys (metric)\n5.512 in 140 Bearing Boys (metric)\n5.906 in 150 Bearing Boys (metric)\n6.496 in 165 Bearing Boys (metric)\n7.087 in 180 Bearing Boys (metric)\n7.874 in 200 Bearing Boys (metric)\n9.055 in 230 Bearing Boys (metric)\n9.843 in 250 Bearing Boys (metric)\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Aircraft Spruce: Delrin rod sizes 1/8 to 2 in — web — Publisher's page; dimensions are facts — https://Aircraftspruce.Com/catalog/mepages/delrinrod.php\n- Bearing Boys: Delrin rod nominal diameters 4 to 250 mm (table of oversize tolerances) — web — Publisher's page; dimensions are facts — https://bearingboys.co.uk/Delrin-Rods-26-a\n- McMaster-Carr: Delrin acetal resin rods (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/delrin-acetal-resin-rods/\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=acetal-delrin-rod-diameters\n", "sources": [ { "publisher": "Aircraft Spruce", "title": "Delrin rod sizes 1/8 to 2 in", "url": "https://Aircraftspruce.Com/catalog/mepages/delrinrod.php", "formats": [ "web" ], "license": "Publisher's page; dimensions are facts", "license_verified": true, "hosted": false }, { "publisher": "Bearing Boys", "title": "Delrin rod nominal diameters 4 to 250 mm (table of oversize tolerances)", "url": "https://bearingboys.co.uk/Delrin-Rods-26-a", "formats": [ "web" ], "license": "Publisher's page; dimensions are facts", "license_verified": true, "hosted": false }, { "publisher": "McMaster-Carr", "title": "Delrin acetal resin rods (free STEP/IGES per part, for your own design use; no redistribution)", "url": "https://www.mcmaster.com/products/delrin-acetal-resin-rods/", "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": [ "acrylic-and-polycarbonate-sheet-thickness", "acrylic-tube-od-wall-sizes", "bar-stock-sizes-round-square-steel-aluminum", "stainless-steel-round-and-flat-bar-sizes", "v-slot-wheels-eccentric-spacers", "nylon-hdpe-uhmw-ptfe-rod-and-sheet-sizes" ], "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 diameters does Delrin rod come in?", "a": "Inch: 1/8, 5/16, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1-3/8, 1-1/2 and 2 in (Aircraft Spruce). Metric: 4, 5, 6, 8, 10 mm up to 250 mm (Bearing Boys)." }, { "q": "Is acetal rod oversize?", "a": "Yes, rods are made slightly over nominal; Bearing Boys prints an oversize tolerance per diameter (not extracted here)." } ], "files_license": null, "offers": [], "markdown": "https://xemstudio.com/objects/acetal-delrin-rod-diameters/index.md" }