Design reference
Made to the keypad/switch PCB footprint supplied by the customer
Flat Springs & Stampings
Custom Snap Domes & Switch Springs
Thin formed spring elements for tactile switches and snap-action controls where force profile, travel and repeatable actuation feel are the primary requirements.
- Manufacturing basis
- Made to drawing
- Wire / thickness
- Thickness 0.05 - 0.3 mm typical (stamped dome)
- Envelope
- 4 - 15 mm typical dome diameter
- Length / height
- Dome height 0.2 - 1 mm typical
About Custom Snap Domes & Switch Springs
Snap domes and switch springs are designed around a force-displacement event rather than a simple linear spring rate. The part stores energy and changes shape quickly near the actuation point, creating tactile feedback and contact movement. Dome geometry, support condition and material thickness all influence the click feel.
Key Design Characteristics
- Actuation force, return force and travel define the tactile response.
- Dome diameter, height and formed features control the snap characteristic.
- The support ring and mating contact layout influence repeatability.
- Surface cleanliness and plating may matter when the spring also closes an electrical circuit.
What to Specify for a Custom Quote
- Dome or spring outline, thickness and material
- Actuation force and travel
- Return-force or tactile-ratio target if applicable
- Contact layout and electrical requirements
- Cycle life, surface finish, environment and quantity
Manufacturing Review
These parts usually need tight control of forming height and material thickness. For switch use, force-displacement testing on samples is more meaningful than visual shape inspection alone.
Common Assembly Roles
- Tactile pushbuttons
- Membrane and control-panel switches
- Snap-action electrical or mechanical interfaces
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
Stainless steel, phosphor bronze, beryllium copper
Why there is no fixed table
Actuation force (tactile "click" force) and travel are specified per switch design.
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 | Engineering Data |
|
Strip / flat wire / stamping / spring steel |
| Engineering Data 02 | Manufacturing Range |
|
Spring strip / stainless / copper alloys as applicable |
| Engineering Data 03 | Manufacturing Range |
|
Strip spring steels / stainless / alloys |
| Typical Configuration 04Data point | Typical Configuration |
|
Stainless steel, nickel plated |
| Typical Configuration 05Data point | Typical Configuration |
|
Stainless steel, nickel plated |
| Typical Configuration 06Data point | Typical Configuration |
|
Stainless steel, nickel plated |
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
Stainless spring strip is common for tactile domes because of corrosion resistance and forming behavior. Conductive plating can be added where the dome is part of the electrical contact.
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.
Flat Springs & Stampings
Contact, Battery & Grounding Springs
Custom conductive spring contacts for batteries, grounding points and electrical interfaces where the part must maintain contact pressure while carrying current or bonding surfaces.
Flat Springs & Stampings
Cantilever & Formed Flat Springs
Flat-strip spring elements that flex from a fixed region to provide contact force, retention or return in thin assemblies where round-wire coils would take too much space.
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
Snap Domes & Switch Springs FAQ
What creates the tactile click in a snap dome?
The dome passes through a geometric instability during compression, causing a rapid change in force and shape near the actuation point.
Can actuation force be changed without changing the dome diameter?
Often yes, through thickness, height and geometry changes, but the return feel and fatigue life must be checked at the same time.
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.