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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

Name: 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
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

What are the outside diameter, bore, thickness and free height of a DIN 2093 disc spring (Belleville washer), series A, B or C? · Standard part · 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

Also called: din 2093 disc spring dimensions, belleville washer size chart, disc spring 20x10.2x1.1, disc spring series a b c, din 2093 series a 25x12.2x1.5, belleville washer 8 mm, disc spring free height l0, disc spring 50x25.4x3, disc spring 100x51x6, disc spring cone height h0, belleville washer step file, disc spring group 1 2 3 thickness, din 2093 40x20.4x2.25

Exact dimensions. Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part. Mating features

length: 100.0 mm
width: 100.0 mm
height: 8.2 mm

Notes

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.

Disc springs (Belleville washers) DIN 2093, series A / B / C: De… size chart

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

Mating features

Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits as drawn.

feature	exact	mates with	fit	files
Di (H12, min = nominal) and De (h12, max = nominal)	per size, e.g. 50 × 25.4, 100 × 51 mm (series A, B, C share De and Di)	guide rod through the bore and housing bore round the outside: the clearance is your design (not in the sources read)	designed	disc-spring-din-2093-*
free height l0 and thickness t	e.g. 50 × 25.4: A l0 4.1 / t 3, B l0 3.4 / t 2, C l0 2.85 / t 1.25 mm	stack height and the space between the seats of a stack	designed	disc-spring-din-2093-*

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

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
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
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
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

Free files

★ Free files 15 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

disc-spring-din-2093-a-16x8-2x0-9	DIN 2093 series A disc spring 16 × 8.2 × 0.9 (De × Di × t), free height l0 1.25 mm, so cone height h0 = l0 − t = 0.35 mm; group 1. Drawn as a cone solid: the band between two cones, thickness t measured along the axis, vertical inner and outer end faces (Xem's profile; the standard's own section drawing was not read), unloaded	STEP · STL
disc-spring-din-2093-b-16x8-2x0-6	DIN 2093 series B disc spring 16 × 8.2 × 0.6 (De × Di × t), free height l0 1.05 mm, so cone height h0 = l0 − t = 0.45 mm; group 1. Drawn as a cone solid: the band between two cones, thickness t measured along the axis, vertical inner and outer end faces (Xem's profile; the standard's own section drawing was not read), unloaded	STEP · STL
disc-spring-din-2093-c-16x8-2x0-4	DIN 2093 series C disc spring 16 × 8.2 × 0.4 (De × Di × t), free height l0 0.9 mm, so cone height h0 = l0 − t = 0.5 mm; group 1. Drawn as a cone solid: the band between two cones, thickness t measured along the axis, vertical inner and outer end faces (Xem's profile; the standard's own section drawing was not read), unloaded	STEP · STL
disc-spring-din-2093-a-25x12-2x1-5	DIN 2093 series A disc spring 25 × 12.2 × 1.5 (De × Di × t), free height l0 2.05 mm, so cone height h0 = l0 − t = 0.55 mm; group 2. Drawn as a cone solid: the band between two cones, thickness t measured along the axis, vertical inner and outer end faces (Xem's profile; the standard's own section drawing was not read), unloaded	STEP · STL
disc-spring-din-2093-b-25x12-2x0-9	DIN 2093 series B disc spring 25 × 12.2 × 0.9 (De × Di × t), free height l0 1.6 mm, so cone height h0 = l0 − t = 0.7 mm; group 1. Drawn as a cone solid: the band between two cones, thickness t measured along the axis, vertical inner and outer end faces (Xem's profile; the standard's own section drawing was not read), unloaded	STEP · STL
disc-spring-din-2093-c-25x12-2x0-7	DIN 2093 series C disc spring 25 × 12.2 × 0.7 (De × Di × t), free height l0 1.6 mm, so cone height h0 = l0 − t = 0.9 mm; group 1. Drawn as a cone solid: the band between two cones, thickness t measured along the axis, vertical inner and outer end faces (Xem's profile; the standard's own section drawing was not read), unloaded	STEP · STL
disc-spring-din-2093-a-40x20-4x2-25	DIN 2093 series A disc spring 40 × 20.4 × 2.25 (De × Di × t), free height l0 3.15 mm, so cone height h0 = l0 − t = 0.9 mm; group 2. Drawn as a cone solid: the band between two cones, thickness t measured along the axis, vertical inner and outer end faces (Xem's profile; the standard's own section drawing was not read), unloaded	STEP · STL
disc-spring-din-2093-b-40x20-4x1-5	DIN 2093 series B disc spring 40 × 20.4 × 1.5 (De × Di × t), free height l0 2.65 mm, so cone height h0 = l0 − t = 1.15 mm; group 2. Drawn as a cone solid: the band between two cones, thickness t measured along the axis, vertical inner and outer end faces (Xem's profile; the standard's own section drawing was not read), unloaded	STEP · STL
disc-spring-din-2093-c-40x20-4x1	DIN 2093 series C disc spring 40 × 20.4 × 1 (De × Di × t), free height l0 2.3 mm, so cone height h0 = l0 − t = 1.3 mm; group 1. Drawn as a cone solid: the band between two cones, thickness t measured along the axis, vertical inner and outer end faces (Xem's profile; the standard's own section drawing was not read), unloaded	STEP · STL
disc-spring-din-2093-a-63x31x3-5	DIN 2093 series A disc spring 63 × 31 × 3.5 (De × Di × t), free height l0 4.9 mm, so cone height h0 = l0 − t = 1.4 mm; group 2. Drawn as a cone solid: the band between two cones, thickness t measured along the axis, vertical inner and outer end faces (Xem's profile; the standard's own section drawing was not read), unloaded	STEP · STL
disc-spring-din-2093-b-63x31x2-5	DIN 2093 series B disc spring 63 × 31 × 2.5 (De × Di × t), free height l0 4.25 mm, so cone height h0 = l0 − t = 1.75 mm; group 2. Drawn as a cone solid: the band between two cones, thickness t measured along the axis, vertical inner and outer end faces (Xem's profile; the standard's own section drawing was not read), unloaded	STEP · STL
disc-spring-din-2093-c-63x31x1-8	DIN 2093 series C disc spring 63 × 31 × 1.8 (De × Di × t), free height l0 4.15 mm, so cone height h0 = l0 − t = 2.35 mm; group 2. Drawn as a cone solid: the band between two cones, thickness t measured along the axis, vertical inner and outer end faces (Xem's profile; the standard's own section drawing was not read), unloaded	STEP · STL
disc-spring-din-2093-a-100x51x6	DIN 2093 series A disc spring 100 × 51 × 6 (De × Di × t), free height l0 8.2 mm, so cone height h0 = l0 − t = 2.2 mm; group 2. Drawn as a cone solid: the band between two cones, thickness t measured along the axis, vertical inner and outer end faces (Xem's profile; the standard's own section drawing was not read), unloaded	STEP · STL
disc-spring-din-2093-b-100x51x3-5	DIN 2093 series B disc spring 100 × 51 × 3.5 (De × Di × t), free height l0 6.3 mm, so cone height h0 = l0 − t = 2.8 mm; group 2. Drawn as a cone solid: the band between two cones, thickness t measured along the axis, vertical inner and outer end faces (Xem's profile; the standard's own section drawing was not read), unloaded	STEP · STL
disc-spring-din-2093-c-100x51x2-7	DIN 2093 series C disc spring 100 × 51 × 2.7 (De × Di × t), free height l0 6.2 mm, so cone height h0 = l0 − t = 3.5 mm; group 2. Drawn as a cone solid: the band between two cones, thickness t measured along the axis, vertical inner and outer end faces (Xem's profile; the standard's own section drawing was not read), unloaded	STEP · STL

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Plain text: sheet.txt · JSON: /api/geometry?object=disc-springs-din-2093