Design reference
Engineered per clutch or seal assembly drawing; no universal public size table
Disc Springs / Belleville Washers
Custom Diaphragm Springs
A thin conical plate spring, often with radial fingers, for clutch, valve and compact force-control assemblies that need a broad annular load path.
- Manufacturing basis
- Made to drawing
- Wire / thickness
- Thickness 1 - 6 mm typical
- Envelope
- 80 - 300 mm typical
- Length / height
- Cone height per drawing
About Custom Diaphragm Springs
Diaphragm springs combine a conical disc body with a load path that may include radial fingers or other formed features. They can provide large axial force in a shallow package and can also act as both spring and lever in the same assembly. The mating rings, finger contact points and deflection path define the real behavior.
Key Design Characteristics
- Outer and inner support diameters determine where the plate bends.
- Finger length, slot shape and contact radius can change leverage and stress.
- The load curve may be deliberately non-linear through the working travel.
- Flatness, cone height and heat treatment strongly affect repeatability.
What to Specify for a Custom Quote
- Outer diameter, inner opening, thickness and cone height
- Finger count, slot pattern and contact radii where applicable
- Support diameters and moving contact position
- Required force through the working travel
- Material, heat treatment, cycles, temperature and quantity
Manufacturing Review
The process route may include blanking or cutting, forming, heat treatment and finish grinding or calibration. Functional load testing at defined deflections is more meaningful than checking cone height alone.
Common Assembly Roles
- Clutch pressure systems
- Valve and seal assemblies
- Compact annular spring mechanisms
Made to Order
How This Product Is Quoted
This category is reviewed from the drawing and working requirement rather than from a fixed public stock list.
Typical material direction
60Si2MnA / 51CrV4 spring steel
Why there is no fixed table
Diaphragm springs (e.g. clutch pressure-plate springs) are matched to the mating assembly and are quoted from application data.
Engineering Data
Typical Dimensions & Design Data
Use these data points to compare geometry, material and working parameters when defining your custom spring. Final values are reviewed and confirmed for the actual assembly before production.
| Configuration | Data type | Key parameters | Material / basis |
|---|---|---|---|
| Engineering Data 01 | Standard Dimension |
|
Spring steel / stainless / specialty alloy |
| Engineering Data 02 | Engineering Data |
|
Depends on standard/type |
| Engineering Data 03 | Material Option |
|
Depends on the specific series |
| Typical Configuration 04Data point | Typical Configuration |
|
Steel |
| Typical Configuration 05Data point | Typical Configuration |
|
Steel |
| Typical Configuration 06Data point | Typical Configuration |
|
Heat-treated general steel |
Design note: dimensions, force / torque, material, tolerances, fatigue life and compliance are finalized against your drawing and operating conditions during quotation.
Next Design Decisions
Next Steps for Your Spring Design
Once the spring style is selected, confirm how it works in the assembly, which material suits the environment, how it will be manufactured and which dimensions and performance points should be controlled on the drawing.
Applications
Where this spring style fits
Review best-fit uses, assembly constraints and situations where another spring style may be a better choice.
View application guidance →Materials
Choose the material for the environment
Alloy spring steels are common for high-load diaphragm springs. Stainless or specialty alloys can be considered for corrosion or temperature, with the load curve revalidated for the different material properties.
Compare spring materials →Manufacturing
Plan prototype and production
Review forming, heat treatment, secondary operations, inspection and the path from first samples to repeat production.
View manufacturing capabilities →Engineering Data
Use the engineering guide for design support
Use the engineering library to review materials, sizing considerations and applicable standards for the custom design.
Open Spring Engineering Guide →Material Direction
Common Material Families to Review
The links below are selection guides, not a claim that every grade is suitable for every size or load.
Compare Designs
Related Spring Products
Use these alternatives when the available space, connection style, travel or force direction changes.
Disc Springs / Belleville Washers
DIN 2093 Belleville Disc Springs
Conical disc springs referenced to DIN 2093 / DIN EN 16983 for high axial force in short travel, with stack arrangements available to change total force and deflection.
Disc Springs / Belleville Washers
Slotted & Contact Disc Springs
Customized disc-spring variants with slots, contact flats or special interfaces for compact axial force where a standard Belleville disc does not match the mating geometry.
Wave Springs
Wave Spring Washers
A washer-like wave spring for light preload, tolerance take-up and rattle control in very shallow axial spaces.
Product Questions
Diaphragm Springs FAQ
Is a diaphragm spring the same as a Belleville washer?
They share a conical-disc principle, but diaphragm springs often include fingers or application-specific geometry and can perform a lever function as well as a spring function.
What is the most useful information for a replacement diaphragm spring?
Provide the mating support diameters, working contact position, force-deflection requirement and the complete finger or slot geometry.
RFQ
Send the Working Requirement
A drawing is ideal. If you do not have one yet, provide the dimensions, load or torque, travel, environment and expected quantity that matter in the assembly.
CustomSprings Engineering Catalog
Request This Spring
Send your dimensions, quantity and drawing for engineering review.