Standard Disc Springs / DIN 2093 Group A

25.0012.201.50*2.05

CENTURY_SPRING model reference: CDM-251215 · CENTURY-DISC-SPRINGS-2014 · locator 17

CHRISTIAN_BAUER model reference: 104 565 · CB-DISC-SPRINGS-0611 · locator 159

MUBEA model reference: 18 0004 · MUBEA-MANUAL-2023 · printed p.64 (PDF p.66)

SCHNORR model reference: 009100 · SCHNORR-HANDBOOK-EN · locator 88

SOLON model reference: SDS 25x12.2x1.5 · SOLON-BELLEVILLE-CATALOG · locator 51

SPIROL model reference: DSC 25.0 x 12.2 x 1.50 DK · SPIROL-DISC-SPRINGS-2026 · locator 17

SPIROL model reference: DSC 25 x 12.2 x 1.5 WR · SPIROL-DISC-SPRINGS-2026 · locator 14

Dimensions, standards and downloadable engineering files are generated from published product data.

Made to order

SPECIFICATION

Product data

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Outside diameter De: 25.00 mm
Inside diameter Di: 12.20 mm
Product thickness t: 1.50 mm
Free height l₀: 2.05 mm
Cone height h₀: 0.55 mm
Standard: DIN 2093
Material / surface treatment: 51CrV4 Spring SteelZinc phosphate and oil · Cold presetting / scraggingERP: 25.00*12.20*1.50*2.05-T-H0.55-51CRV4-PHOSPHATE_OIL-PSX10CrNi18-8 / AISI 301 Stainless SteelPlain / natural finish · Cold presetting / scraggingERP: 25.00*12.20*1.50*2.05-T-H0.55-1.4310-PLAIN-PS60Si2MnAZinc phosphate and oil · Cold presetting / scraggingERP: 25.00*12.20*1.50*2.05-T-H0.55-60SI2MNA-PHOSPHATE_OIL-PS
Temperature: -50 – 300 °C

ENGINEERING FILES

CAD / DXF / STEP

Repository CAD · direct download

25.00*12.20*1.50*2.05 DXF and DWG engineering drawing preview

Open full drawing preview

DWG25.00*12.20*1.50*2.05 DWG CADJH-DS-25.00-12.20-1.50-2.05-P322-EN-R10.dwg · 49 KB

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DXF25.00*12.20*1.50*2.05 DXF CADJH-DS-25.00-12.20-1.50-2.05-P322-EN-R10.dxf · 125 KB

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STEP25.00*12.20*1.50*2.05 STEP CADJH-DS-25.00-12.20-1.50-2.05-P322-R10.step · 21 KB

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STL25.00*12.20*1.50*2.05 STL CADJH-DS-25.00-12.20-1.50-2.05-P322-R10.stl · 1.6 MB

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ENGINEERING OVERVIEW

Candidate decision overview

Data version 3

GEOMETRY CONTRACT

Conical profile

Bearing surfaces: No
Tolerance grade: See dossier / confirm

Special surface parameters must be reviewed against the released drawing; the profile name alone is not a complete geometry definition.

EVIDENCE COVERAGE

✓Manufacturer curve / stress7✓Polysplendid calculations1✓Resolved standards2✓Inspection dossier1—Approved product FEMNot public

A missing FEM record is not evidence of failed validation. It means no approved product-level study is public on this page.

COMBINATION BOUNDARY

Check single disc before stack

Parallel stacks primarily multiply load; series stacks primarily multiply travel. Friction, contact, guidance, preload and manufacturing scatter must be checked separately.

Stack and curves Fatigue / relaxation boundary Calculate this product

CF-07 · PROCESS CARD LIBRARY

Manufacturing process cards

5 material route(s)

Each material and supplied-surface identity has its own database-driven workbook and PNG preview. A review or blocked status is not a production release.

V13627 · R04

1.4310

PLAIN

CONTINUOUS_DIE_FORM+AUSTENITIC_COLD_WORK+NO_SUPPORT_FACE+STRONG_PRESS+PLAIN

Blocked — not for production

Download Excel · 20 kB

V25 · R04

50CrVA

BLACK_OXIDE

CONTINUOUS_DIE_FORM+LOW_ALLOY_QT+NO_SUPPORT_FACE+STRONG_PRESS+BLACK_OXIDE

Blocked — not for production

Download Excel · 20.6 kB

V27 · R04

51CrV4

PHOSPHATE_OIL

CONTINUOUS_DIE_FORM+LOW_ALLOY_QT+NO_SUPPORT_FACE+STRONG_PRESS+PHOSPHATE_OIL

Blocked — not for production

Download Excel · 20.3 kB

V26 · R04

60Si2MnA

BLACK_OXIDE

CONTINUOUS_DIE_FORM+LOW_ALLOY_QT+NO_SUPPORT_FACE+STRONG_PRESS+BLACK_OXIDE

Blocked — not for production

Download Excel · 20.6 kB

V19359 · R04

60Si2MnA

PHOSPHATE_OIL

CONTINUOUS_DIE_FORM+LOW_ALLOY_QT+NO_SUPPORT_FACE+STRONG_PRESS+PHOSPHATE_OIL

Blocked — not for production

Download Excel · 20.6 kB

APPROVED SOURCE DATA

Manufacturer engineering data

7 traceable datasets

Loads, stresses, thousand-piece weights and curves retain their manufacturer, source version, page/worksheet, material and temperature condition. A catalog value is an engineering reference unless the inspection dossier separately identifies an approved acceptance tolerance.

Century Spring / MW Industries CDM-251215Manufacturer catalog curve

Source: Century Spring Precision Disc Springs / 2014-01
Location: page 17
Material: AISI C1075 or AISI 6150 carbon/alloy steel
Temperature: Not stated - not assumed
Curve scope: four_point_curve / loading
1000-piece weight: —

Published source points only; no interpolation.

Point	s/h0	s (mm)	F (N)	σ1 / σII (MPa)	σ2 / σIII (MPa)	σ3 (MPa)	σOM (MPa)
25% h	0.250	0.1397	1,112	448	—	—	—
50% h	0.500	0.2769	2,144	951	—	—	—
75% h	0.750	0.4166	3,123	1,510	—	—	—
100% h	1.000	0.5537	4,079	2,117	—	—	—

Christian Bauer GmbH + Co. KG 104 565Manufacturer workbook calculation

Source: Christian Bauer cb_cV4 Product List / local reference edition
Location: Liste row 97
Material: Not stated in this source table
Temperature: Not stated - not assumed
Curve scope: single_point / loading
1000-piece weight: —

Point	s/h0	s (mm)	F (N)	σ1 / σII (MPa)	σ2 / σIII (MPa)	σ3 (MPa)	σOM (MPa)
75% h0	0.750	0.4125	2,910	—	—	—	—

Mubea 18 0004Manufacturer calculation workbook

Source: Disc Spring Calculation Program 032 / 032
Location: Standard row 79
Material: Not stated in this source table
Temperature: Not stated - not assumed
Curve scope: four_point_curve / loading
1000-piece weight: 4.403 kg

Published source points only; no interpolation.

Point	s/h0	s (mm)	F (N)	σ1 / σII (MPa)	σ2 / σIII (MPa)	σ3 (MPa)	σOM (MPa)
25% h0	0.250	0.1370	1,040	761	425	393	—
50% h0	0.500	0.2750	2,007	1,473	898	757	—
75% h0	0.750	0.4120	2,926	2,138	1,419	1,091	—
100% h0	1.000	0.5500	3,821	2,755	1,988	1,395	—

SCHNORR GmbH 009100Manufacturer catalog summary

Source: Schnorr Disc Springs Handbook / source copy in project archive
Location: page 88
Material: Not stated in this source table
Temperature: Not stated - not assumed
Curve scope: summary_only / loading
1000-piece weight: 4.219 kg

This source table publishes a summary (weight and/or σOM) but no displacement-load points; no curve has been invented.

Solon Manufacturing Co. SDS 25x12.2x1.5Manufacturer catalog point

Source: Solon Belleville Springs Washer Catalog / local reference edition
Location: page 51
Material: 50CrV4 (AISI 6150 equivalent)
Temperature: Not stated - not assumed
Curve scope: single_point / loading
1000-piece weight: —

Point	s/h0	s (mm)	F (N)	σ1 / σII (MPa)	σ2 / σIII (MPa)	σ3 (MPa)	σOM (MPa)
catalog listed operating point	1.016	0.5590	3,821	—	—	—	—

SPIROL International Corporation DSC 25.0 x 12.2 x 1.50 DKManufacturer design calculation

Source: SPIROL Disc Springs / 2026
Location: page 17
Material: 1.4310
Temperature: Not stated - not assumed
Curve scope: five_point_curve / loading
1000-piece weight: —

Published source points only; no interpolation.

Point	s/h0	s (mm)	F (N)	σ1 / σII (MPa)	σ2 / σIII (MPa)	σ3 (MPa)	σOM (MPa)
15% h0 preload	0.145	0.0800	585	230	221	—	—
25% h0	0.255	0.1400	959	392	363	—	—
50% h0	0.509	0.2800	1,851	829	698	—	—
75% h0	0.745	0.4100	2,699	1,309	1,006	—	—
100% h0 / flat	1.000	0.5500	3,524	—	—	—	-1,496

SPIROL International Corporation DSC 25 x 12.2 x 1.5 WRManufacturer design calculation

Source: SPIROL Disc Springs / 2026
Location: page 14
Material: Alloy Steel
Temperature: Not stated - not assumed
Curve scope: five_point_curve / loading
1000-piece weight: —

Published source points only; no interpolation.

Point	s/h0	s (mm)	F (N)	σ1 / σII (MPa)	σ2 / σIII (MPa)	σ3 (MPa)	σOM (MPa)
15% h0 preload	0.145	0.0800	634	249	239	—	—
25% h0	0.255	0.1400	1,040	425	393	—	—
50% h0	0.509	0.2800	2,007	898	757	—	—
75% h0	0.745	0.4100	2,926	1,419	1,091	—	—
100% h0 / flat	1.000	0.5500	3,821	—	—	—	-1,622

STANDARD DOSSIER

Resolved standard requirements

35 resolved items

PS/DS-G01-2026Polysplendid disc-spring engineering recommendations (non-mandatory)

Series A · Group 2 · without bearing surfaces

ProductRecommended edge-radius range (enterprise drawing rule)

t产品 / 6 ≤ R ≤ t产品 / 5；product limits 0.25–0.3 mm；product recommendation 0.25 mm；Use actual product thickness: t for plain T products and t-prime for reduced TP products. CAD defaults to the lower bound while drawings expose the full recommended range.

Disc Spring Contact Surfaces · Machinery's Handbook 31st, p.390（厂商经验转述）

ProductPolysplendid default working-deflection range

0.2–0.75 h0；product limits 0.11–0.4125 mm

聚辉推荐 DS-G01 · Mubea 2023 manual PDF 27；SPIROL deflection-range white paper

ProductNormal parallel-stack count recommendation

1–4

3.10 Spring stack design · Mubea Disc Springs Manual 2023, PDF 24

ProductSeries-stack limit for standard fatigue-chart evidence

See requirement data

10.2.2 · DIN EN 16983 page 18（PDF 20）

ProcessGuidance and stack lubrication

按温度、介质和寿命选择油、脂、含二硫化钼膏或固体润滑；不得把未润滑摩擦忽略

guidance / lubrication / friction · Mubea 2023 manual PDF 25, 28～31；Christian Bauer theory PDF 17

ProductGuidance preference

优先内导柱；空间或结构要求时使用外导套；低迟滞需求评估自定心结构

C.1 / 3.10 · GB/T 1972.2 附录 C；Mubea 2023 manual PDF 24～25

ProductGeometry triggers for enhanced analysis

De/Di=2.04918，De/t=16.666667，within simplified-geometry range

3.9 Special cases · Mubea Disc Springs Manual 2023, PDF 21

DIN EN 16983:2017-09Disc springs — Quality specifications — Dimensions

Series A · Group 2 · without bearing surfaces

ProductDisc spring group 2

Table 2 · EN 16983 pages 6～7（PDF 8～9）

ProductDimension series A

Table 3 · EN 16983 pages 6～7（PDF 8～9）

ProductStandard spring steel requirement

EN 10083 / EN 10089 / EN 10132-4 MPa

5 · EN 16983 page 7（PDF 9）

ProcessGroup 2 manufacturing and surface finish

冲压/精冲、冷成形、内外径加工、边缘倒圆

Table 7 · EN 16983 page 11（PDF 13）

ProductThickness tolerance

deviation -0.12 / +0.04 mm；product limits 1.38–1.54 mm

Table 8 · EN 16983 page 13（PDF 15）

ProductOutside diameter h12 tolerance

deviation -0.21 / 0 mm；product limits 24.79–25 mm；h12

8.1 / ISO 286-2 · EN 16983 page 12（PDF 14）

ProductInside diameter H12 tolerance

deviation 0 / +0.18 mm；product limits 12.2–12.38 mm；H12

8.1 / ISO 286-2 · EN 16983 page 12（PDF 14）

ProductFree-height tolerance

deviation -0.08 / +0.15 mm；product limits 1.97–2.2 mm

Table 9 · EN 16983 page 13（PDF 15）

ProductTest-load tolerance

deviation -7.5 / +15 %；test position 0.75 h0

Table 10 · EN 16983 pages 13～14（PDF 15～16）

ProductCoaxiality tolerance

0.26 mm；2 × IT11

8.1 / ISO 286-2 · EN 16983 page 12（PDF 14）

InspectionGroup 2 / series A minimum unloading-force ratio

See requirement data

Table 11 · EN 16983 page 15（PDF 17）

ProductGroup 2 hardness

42–52 HRC

7.2 · EN 16983 page 11（PDF 13）

ProductRecommended total clearance for guide pin

0.2 mm；recommended guide pin diameter 12 mm

Table 12 · EN 16983 page 15（PDF 17）

ProductRecommended total clearance for guide sleeve

0.4 mm；recommended guide sleeve bore 25.4 mm

Table 12 · EN 16983 page 15（PDF 17）

ProductGuide component surface requirement

See requirement data

12 · EN 16983 section 12, page 21（PDF 23）

ProcessPresetting

2 × test load；压至平位后复核自由高度与检测负荷

7.4 / 8.4.2 · EN 16983 pages 12, 14（PDF 14, 16）

ProcessSurface quality and edges

无影响性能的斑疤、裂纹、锈蚀；边缘倒圆或去毛刺

7.5 · EN 16983 page 12（PDF 14）

ProcessSurface treatment and corrosion protection

phosphated and oiled

7.5 · EN 16983 page 12（PDF 14）

ProcessShot peening

recommended for dynamic duty where fatigue-life improvement is required；process agreement required

10.2.2 · EN 16983 page 20（PDF 22）

InspectionDecarburization depth

product maximum depth 0.045 mm

7.2 · EN 16983 page 11（PDF 13）

ProductStatic calculated stress limit

See requirement data

10.1 · EN 16983 page 17（PDF 19）

ProductMinimum preload for dynamic duty

0.15–0.2 h0；product limits 0.0825–0.11 mm

10.2.1 · EN 16983 page 18（PDF 20）

ProductRelaxation and operating-temperature note

Consult the manufacturer above 100 °C for material, stress and relaxation requirements

9 / Figures 3–4 · EN 16983 page 17（PDF 19）

InspectionTest-load method

test position 0.75 h0；硬化、磨削并抛光的压盘；使用适合润滑剂

8.4.1 · EN 16983 page 13（PDF 15）

InspectionDimensional inspection method

按标准约定的量具、压盘及测量条件执行

8 · EN 16983 pages 13～14（PDF 15～16）

InspectionHardness test method and location

See requirement data

11.3 · EN 16983 page 21（PDF 23）

BatchBatch sampling and acceptance

Acceptance inspection according to EN ISO 3269 where applicable

2 · EN 16983 pages 11～18（PDF 13～20）

PackagingMarking, packaging and storage

Contract and product documentation requirements apply

contract · EN 16983 pages 11～18（PDF 13～20）

INSPECTION DOSSIER

Product inspection requirements

7 acceptance limits

Data boundary: 平面度没有标准通用数值，等待图纸/工艺卡/供需协议覆盖; 平行度没有标准通用数值，等待图纸/工艺卡/供需协议覆盖

Characteristic	Requirement / limits	Status	Source
Outside diameterD / De	25 mm (-0.21/+0 mm); limits 24.79–25 mmThe standard rule has been resolved for this specific product.	Resolved	DIN EN 16983:2017-09EN 16983 page 12（PDF 14）
Inside diameterd / Di	12.2 mm (+0/+0.18 mm); limits 12.2–12.38 mmThe standard rule has been resolved for this specific product.	Resolved	DIN EN 16983:2017-09EN 16983 page 12（PDF 14）
Product thicknesst / t′	1.5 mm (-0.12/+0.04 mm); limits 1.38–1.54 mmThe standard rule has been resolved for this specific product.	Resolved	DIN EN 16983:2017-09EN 16983 page 13（PDF 15）
Free heightH0 / l₀	2.05 mm (-0.08/+0.15 mm); limits 1.97–2.2 mmThe standard rule has been resolved for this specific product.	Resolved	DIN EN 16983:2017-09EN 16983 page 13（PDF 15）
Cone heighth0 / h₀	0.55 mm (-0.12/+0.27 mm); limits 0.43–0.82 mmWorst-case envelope derived from free-height and plain product thickness t tolerances; it is a reference, not an independent standard h0 acceptance tolerance.	Derived reference	DIN-EN-16983-2017-09EN 16983 page 13（PDF 15）; EN 16983 page 13（PDF 15）
Coaxiality—	≤ 0.26 mmThe standard rule has been resolved for this specific product.	Resolved	DIN EN 16983:2017-09EN 16983 page 12（PDF 14）
Flatness—	Set by approved drawing, process card or supply agreementThe standard does not provide a universal independent numeric tolerance; an approved drawing, process card or supply agreement must provide the acceptance value.	Agreement required	POLYSPLENDID-INSPECTION-POLICY-2026-08Task 121 标准原文核对结论
Parallelism—	Set by approved drawing, process card or supply agreementThe standard does not provide a universal independent numeric tolerance; an approved drawing, process card or supply agreement must provide the acceptance value.	Agreement required	POLYSPLENDID-INSPECTION-POLICY-2026-08Task 121 标准原文核对结论
Test loadFt	2926 N (-7.5/+15%); limits 2706.55–3364.9 NThe nominal test load comes from the current published standard, manufacturer, or engineering dataset; limits use the applicable DIN EN 16983 percentage tolerance.	Resolved	DIN EN 16983:2017-09EN 16983 pages 13～14（PDF 15～16）
Hardness—	42–52 HRCThe standard rule has been resolved for this specific product.	Resolved	DIN EN 16983:2017-09EN 16983 page 11（PDF 13）

Where cone-height limits are shown, they are derived references only. Flatness and parallelism become acceptance criteria only after an approved drawing, process card or supply agreement supplies numeric values.

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