Disc springs (Belleville washers) DIN 2093, series A / B / C: De, Di, t, free height l0, cone height h0, groups 1–3 + cone-solid models — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/disc-springs-din-2093/ (sheet CC BY 4.0) Basis: fasten.it's DIN 2093 table (De, Di, t, l0; 87 rows, one row dropped), Schnorr's handbook (38 DIN series A / B / C rows up to De 40: De, Di, t, l0 agree on every row), ITA Fasteners' series A rows (De 8 to 250; agree except one Di); 15 cone-solid models as files; loads left out Catalog version: 2026-10-20 Overall (mm): length 100.0, width 100.0, height 8.2 - DIN 2093 disc springs (Belleville washers, conical spring washers) come in three series that share the outer diameter De and bore Di but differ in thickness t and free height l0: at each size A is the thickest and C the thinnest (for example 100 × 51: A t 6, B t 3.5, C t 2.7). Rows: series, group, De (h12, max = nominal), Di (H12, min = nominal), thickness t, free height l0 (unloaded overall height) and h0 = l0 − t (computed: the cone height; Schnorr's list prints h0 and l0 − t equals it on every Schnorr row read, and on all 29 of ITA's series A rows). - Groups (fasten.it): group 1 is t under 1.25 mm (cold formed, radiused edges, no bearing flats); group 2 is 1.25 up to and including 6 mm (cold formed, machined, radiused edges, no bearing flats); group 3 is over 6 mm (machined from forged blanks, with bearing flats and a reduced thickness t'). The group column here follows that thickness rule (fasten.it's own group column puts series A 22.5 × 11.2 and 25 × 12.2 in group 1 although t is 1.25 and 1.5, which is group 2 by its rule). For group 3, ITA prints a reduced thickness t' for series A in brackets after t (125: 7.5, 140: 7.5, 160: 9.4, 180: 9.4, 200: 11.25, 225: 11.25, 250: 13.1); B and C group 3 rows have no t' in the sources read. The width of the bearing flats is not in the sources read. - Checks: fasten.it, Schnorr and ITA agree on De, Di, t and l0 for every comparable row except the 40 × Di row: fasten.it and Schnorr print Di 20.4 and ITA 20.1, so 20.4 is shown. fasten.it's table also prints a column headed t1 that equals l0 − t on many rows but not on 15 of the rows (for example series C 16 × 8.2 × 0.4: l0 0.9, t1 0.55, but Schnorr's h0 is 0.5), so that column is not used. fasten.it's row for series C 71 × 36 (t printed as 1, l0 4.6) is out of line with its neighbours (C 63: t 1.8, C 80: t 2.25) and is dropped. Schnorr's list continues to De 250 beyond the part read; De 45 and above in series B and C rest on fasten.it alone (ITA covers series A only). - Loads, deflections and stresses are left out on purpose: fasten.it and ITA print them (F at 25 / 50 / 75 / 100 % of h0, s, stresses) with labels the text extraction did not keep, and a spring's load should come from the maker's curve, not a dimension page. The standard calls out De h12, Di H12 for the sizes; a guide rod or bore must clear Di and De by your own allowance (see Mating features). - Files: 15 cone solids, series A, B and C at De 16, 25, 40, 63 and 100 mm (groups 1 and 2 only: group 3 has flats and a reduced thickness not defined by the numbers read). Each is the band between two cones with the axial thickness t, vertical end faces, Di bore and De outside, free height l0, so De, Di, t and l0 are exactly the table values. This is Xem's profile; the standard's own section drawing (square edges to the cone, radii) was not read, so edge radii are not modelled. Schnorr's disc-spring page is linked for CAD per spring. series group De (mm, h12) Di (mm, H12) t (mm) l0 (mm) h0 = l0 − t (mm, computed) C 1 8 4.2 0.2 0.45 0.25 B 1 8 4.2 0.3 0.55 0.25 A 1 8 4.2 0.4 0.6 0.2 C 1 10 5.2 0.25 0.55 0.3 B 1 10 5.2 0.4 0.7 0.3 A 1 10 5.2 0.5 0.75 0.25 C 1 12.5 6.2 0.35 0.8 0.45 B 1 12.5 6.2 0.5 0.85 0.35 A 1 12.5 6.2 0.7 1 0.3 C 1 14 7.2 0.35 0.8 0.45 B 1 14 7.2 0.5 0.9 0.4 A 1 14 7.2 0.8 1.1 0.3 C 1 16 8.2 0.4 0.9 0.5 B 1 16 8.2 0.6 1.05 0.45 A 1 16 8.2 0.9 1.25 0.35 C 1 18 9.2 0.45 1.05 0.6 B 1 18 9.2 0.7 1.2 0.5 A 1 18 9.2 1 1.4 0.4 C 1 20 10.2 0.5 1.15 0.65 B 1 20 10.2 0.8 1.35 0.55 A 1 20 10.2 1.1 1.55 0.45 C 1 22.5 11.2 0.6 1.4 0.8 B 1 22.5 11.2 0.8 1.45 0.65 A 2 22.5 11.2 1.25 1.75 0.5 C 1 25 12.2 0.7 1.6 0.9 B 1 25 12.2 0.9 1.6 0.7 A 2 25 12.2 1.5 2.05 0.55 C 1 28 14.2 0.8 1.8 1 B 1 28 14.2 1 1.8 0.8 A 2 28 14.2 1.5 2.15 0.65 C 1 31.5 16.3 0.8 1.85 1.05 B 2 31.5 16.3 1.25 2.15 0.9 A 2 31.5 16.3 1.75 2.45 0.7 C 1 35.5 18.3 0.9 2.05 1.15 B 2 35.5 18.3 1.25 2.25 1 A 2 35.5 18.3 2 2.8 0.8 C 1 40 20.4 1 2.3 1.3 B 2 40 20.4 1.5 2.65 1.15 A 2 40 20.4 2.25 3.15 0.9 C 2 45 22.4 1.25 2.85 1.6 B 2 45 22.4 1.75 3.05 1.3 A 2 45 22.4 2.5 3.5 1 C 2 50 25.4 1.25 2.85 1.6 B 2 50 25.4 2 3.4 1.4 A 2 50 25.4 3 4.1 1.1 C 2 56 28.5 1.5 3.45 1.95 B 2 56 28.5 2 3.6 1.6 A 2 56 28.5 3 4.3 1.3 C 2 63 31 1.8 4.15 2.35 B 2 63 31 2.5 4.25 1.75 A 2 63 31 3.5 4.9 1.4 B 2 71 36 2.5 4.5 2 A 2 71 36 4 5.6 1.6 C 2 80 41 2.25 5.2 2.95 B 2 80 41 3 5.3 2.3 A 2 80 41 5 6.7 1.7 C 2 90 46 2.5 5.7 3.2 B 2 90 46 3.5 6 2.5 A 2 90 46 5 7 2 C 2 100 51 2.7 6.2 3.5 B 2 100 51 3.5 6.3 2.8 A 2 100 51 6 8.2 2.2 C 2 112 57 3 6.9 3.9 B 2 112 57 4 7.2 3.2 A 2 112 57 6 8.5 2.5 C 2 125 64 3.5 8 4.5 B 2 125 64 5 8.5 3.5 A 3 125 64 8 (t' 7.5) 10.6 2.6 C 2 140 72 3.8 8.7 4.9 B 2 140 72 5 9 4 A 3 140 72 8 (t' 7.5) 11.2 3.2 C 2 160 82 4.3 9.9 5.6 B 2 160 82 6 10.5 4.5 A 3 160 82 10 (t' 9.4) 13.5 3.5 C 2 180 92 4.8 11 6.2 B 2 180 92 6 11.1 5.1 A 3 180 92 10 (t' 9.4) 14 4 C 2 200 102 5.5 12.5 7 B 3 200 102 8 13.6 5.6 A 3 200 102 12 (t' 11.25) 16.2 4.2 C 3 225 112 6.5 13.6 7.1 B 3 225 112 8 14.5 6.5 A 3 225 112 12 (t' 11.25) 17 5 C 3 250 127 7 14.8 7.8 B 3 250 127 10 17 7 A 3 250 127 14 (t' 13.1) 19.6 5.6 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - fasten.it: DIN 2093 disc springs (12/2013, supersedes 01/1992; the page says the norm is cancelled): De h12, Di H12, t, l0 (printed 'h1 cone height') and a 'h0' column, groups 1 to 3, series A / B / C, 87 rows — web — Reference page; numbers only — https://fasten.it/en/norms/norm/din_2093 - Schnorr: Schnorr handbook for disc springs: DIN 2093 series A / B / C (and Schnorr works-standard sizes) with De, Di, t, l0, h0 for De 6 to 40 mm (38 DIN rows read; Schnorr's list continues in the same layout) — web — Maker handbook; numbers only — https://www.schnorr.com/_files/ugd/c85325_2d0c8d9248b74df58887d30fcc394c81.pdf?index=true - ITA Fasteners: Disc springs DIN 2093: group, De h12, Di H12, t (and t' for group 3), h0, l0, force, deflection (series A rows, De 8 to 250) — web — Maker page; numbers only — https://itafasteners.com/products-washers-disc-springs.php - Schnorr: Standard disc springs (DIN 2093), maker's product page with CAD data per spring — web, CAD — Maker site terms; CAD per part from the maker [verify license at link] — https://www.schnorr-group.com/en/products/disc-springs/standard-disc-springs Free files (CC BY 4.0, Xem Studio; STEP + STL, 15 parts): https://xemstudio.com/files/hardware/disc-springs-din-2093/index.json API: https://xemstudio.com/api/geometry?object=disc-springs-din-2093