Acetal (Delrin) rod diameters: 1/8 to 2 in and 4 to 250 mm nominal sizes — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/acetal-delrin-rod-diameters/ (sheet CC BY 4.0) Basis: Aircraft Spruce Delrin rod list (inch) and Bearing Boys Delrin rod tolerance table (metric nominal diameters); McMaster-Carr linked Catalog version: 2026-10-20 Sizes: see table below - 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). nominal diameter mm source 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) Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Aircraft Spruce: Delrin rod sizes 1/8 to 2 in — web — Publisher's page; dimensions are facts — https://Aircraftspruce.Com/catalog/mepages/delrinrod.php - 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 - 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/ No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned. API: https://xemstudio.com/api/geometry?object=acetal-delrin-rod-diameters