Calculation Basics
How to Read a Disc Spring Load-Deflection Curve
A practical explanation of disc spring load-deflection curves, load F, deflection s, working point, stacking effects and early-stage calculation.
Read GuideDisc Spring Stack Design | Belleville Washer Stack RFQ
Series and parallel Belleville washer stacks engineered for target load, travel, preload retention, material choice and installation height.
Engineered for Reliable Load Control
Series and parallel Belleville washer stacks engineered for target load, travel, preload retention, material choice and installation height.
- DIN 2093 geometry basis
- Series stacks for larger travel
- Parallel stacks for higher load
- Combined stacks for load-travel balance
If you need to estimate load, deflection or stack arrangement, use the Disc Spring Design Calculator before sending drawings for engineering review.
Standard Sizes
Stack assemblies can be configured from standard DIN 2093 sizes from OD 6-1000 mm or custom Belleville washer geometry.
Materials
51CrV4, 60SiCr7, 50CrVA, 301, 304, 316, 17-7PH, Inconel X-750, Inconel 625, Inconel 718, Nimonic 90 and project-specific alloys.
Temperature Range
-200 deg C to +815 deg C depending on selected material, stack stress, preload level and working environment.
Recommended Applications
- Valve actuator spring packs
- Flange live loading systems
- Petrochemical bolting assemblies
- Heavy machinery overload protection
RFQ DATA CHECKLIST
Send the application data engineers need first
For a faster quotation, include the basic spring geometry, target load and service condition. If a value is not confirmed yet, send the drawing or installed photos and mark it as estimated.
- OD / outside diameter
- ID / inside diameter
- Thickness and free height
- Material or working environment
- Quantity and delivery target
- Target load and working deflection
- Working temperature
- Application, drawing or photos
Key Product Data
Series and parallel stacks
Load and travel tuning
Preload retention review
Drawing-based stack layout
Disc Spring Stack Configuration Guide
| Stack type | Common notation | Primary effect | Typical use case |
|---|---|---|---|
| Single disc | 1 x 1 | Baseline load and travel | Simple preload or replacement parts |
| Series stack | 1 x n | Increases travel and lowers rate | Actuators and assemblies needing longer working stroke |
| Parallel stack | m x 1 | Increases load capacity | Compact high-load preload packs |
| Combined stack | m x n | Balances load and travel | Valve, flange and heavy equipment spring packs |
Final stack behavior depends on friction, guide clearance, lubrication, surface finish, material condition and working deflection.
Stack Material Selection Notes
| Service condition | Typical material family | Engineering note |
|---|---|---|
| General industrial preload | 51CrV4 / 60SiCr7 / 50CrVA | Cost-effective baseline when corrosion and heat are controlled. |
| Corrosion or outdoor exposure | 304 / 316 / 17-7PH stainless | Useful when rust, moisture or chemical exposure could reduce service life. |
| HPHT or severe valve duty | Inconel X-750 / 625 / 718 | Reviewed when preload loss, relaxation or corrosion risk is critical. |
| Chemical process corrosion | Hastelloy C-276 | Used for chloride, acid and scrubber environments where standard alloys are not enough. |
Disc spring stack RFQ notes
Disc spring stack design supplier and custom Belleville washer stack requests usually mean the buyer already has a target load, travel or installation envelope that a single washer cannot solve.
The key RFQ inputs are stack height, working travel, required load, series or parallel preference, guide clearance, lubrication, temperature, cycle duty and material requirement.
A calculator can help estimate the first direction, but final stack behavior should still be reviewed for friction, stress, fatigue and preload loss.
Related Technical Guides
Calculation Basics
Disc Spring Working Height: Free Height, Deflection and Load
Learn why disc spring load must be checked at the working height, not only by thickness. Includes free height, compressed height and deflection logic.
Read GuideStack Design Basics
Disc Spring Guidance Clearance: Shaft, Sleeve and Stack Stability
Disc spring guidance clearance should not be too large or too small. Learn how shaft guidance, sleeve guidance, friction and thermal expansion affect stack stability.
Read GuideFailure Review
Common Disc Spring Failure Causes Beyond Material Problems
Disc spring failures are not always caused by material. Over-compression, poor guidance, high temperature, corrosion, wrong stacking and contact issues are common causes.
Read GuideStack Design Basics
Disc Spring Stacking Methods: Parallel, Series and Combined Arrangements
Disc spring stacks should not be selected by piece count only. Parallel stacking increases load, series stacking increases travel, and combined stacks balance both.
Read GuideStandards Guide
DIN 2093 A, B and C Series: Disc Spring Groups and Selection Notes
DIN 2093 A, B and C series are not only size groups. Geometry, thickness, cone height, load curve and working point all affect disc spring selection.
Read GuideCommon Product Questions
When should disc springs be stacked in series?
Series stacking is used when the assembly needs more travel at a lower combined spring rate while keeping the same load path through each disc.
When should disc springs be stacked in parallel?
Parallel stacking is used when the installation needs higher load capacity in limited axial space, but stress, friction and load sharing must be reviewed.
What information is needed to quote a disc spring stack?
Useful RFQ data includes installation height, working travel, target load, temperature, cycle duty, material preference, surface finish and any drawing or equipment interface limits.