Design reference
Made to the customer's EMI gasket channel drawing; no generic public catalog
Garter & Canted Coil Springs
Custom EMI Shielding Springs
Conductive spring contacts for enclosure seams and interfaces where mechanical compliance must maintain electrical continuity for EMI shielding or grounding.
- Manufacturing basis
- Made to drawing
- Wire / thickness
- 0.1 - 0.5 mm typical conductive wire
- Envelope
- Per gasket channel dimension
- Length / height
- N/A (formed to channel profile)
About Custom EMI Shielding Springs
EMI shielding springs work at the boundary between mechanical fit and electrical performance. They need enough compliance to follow tolerance, vibration and repeated opening while maintaining a low-resistance contact path. Contact spacing, surface finish and the mating metal are as important as the free spring shape.
Key Design Characteristics
- Contact force must be high enough for reliable electrical contact without damaging the enclosure or making assembly difficult.
- Pitch or contact spacing affects how continuously the seam is electrically bridged.
- Plating and base material should be compatible with the mating surface and environment to limit corrosion.
- Repeated compression should stay within an elastic range so contact force does not fade after service cycles.
What to Specify for a Custom Quote
- Available seam or groove geometry
- Required compression range and contact force
- Contact spacing or pitch
- Electrical performance target and mating-surface material
- Base material, plating, environment, cycles and quantity
Manufacturing Review
Mechanical height and electrical surface quality should be controlled together. For plated parts, masking, plating thickness and post-plate handling can affect both dimensions and contact reliability.
Common Assembly Roles
- Enclosure seam grounding
- EMI gasket contact
- Repeated electrical contact between removable covers and chassis
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
Beryllium copper, conductive stainless, silver- or tin-plated alloys
Why there is no fixed table
Shielding effectiveness and compression force depend on the enclosure channel design supplied by the customer.
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 |
|
Stainless / spring alloys / plated options |
| engineering minimum | Engineering Data |
|
SS / MP35N / Elgiloy / BeCu / Inconel etc. |
| Engineering Data 03 | Material Option |
|
Multiple conductive/corrosion-resistant alloys |
| Typical Configuration 04Data point | Typical Configuration |
|
302/316 SS, MP35N, Elgiloy, BeCu, Inconel etc. |
| Typical Configuration 05Data point | Typical Configuration |
|
302/316 SS, MP35N, Elgiloy, BeCu, Inconel etc. |
| Typical Configuration 06Data point | Typical Configuration |
|
302/316 SS, MP35N, Elgiloy, BeCu, Inconel etc. |
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
Copper alloys and stainless materials with suitable conductive finishes are common directions. The final combination should consider galvanic compatibility, conductivity and spring life.
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.
Garter & Canted Coil Springs
Canted Coil Springs
A continuous ring of canted coils used where a compact circular interface needs repeatable radial or axial spring force, electrical contact, latching or sealing support.
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.
Product Questions
EMI Shielding Springs FAQ
Is spring force alone enough to guarantee EMI performance?
No. Shielding also depends on contact spacing, surface condition, enclosure design and electrical continuity across the whole seam.
Why does plating matter on an EMI spring?
Plating can improve conductivity and corrosion behavior at the contact surface, but it must be compatible with the base material and mating metal.
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.