EMI/RF shields & grounding components
Built for shielding, grounding, continuity, and reliable chassis contact.
Gromax manufactures precision stamped metal components used to control electromagnetic interference, establish grounding paths, maintain electrical continuity, and provide repeatable chassis or enclosure contact.
We review material, geometry, contact force, seam and enclosure interfaces, plating, conductivity, corrosion exposure, and assembly requirements to support consistent electrical and mechanical performance.
part examples
Board-Level Shield Cans
Stamped covers or enclosures used around electronic circuitry to help contain or reduce electromagnetic coupling between sensitive or noisy components.
Shielding Frames & Covers
Formed metal frames, lids, and covers that create conductive barriers around electronics, connectors, or subassemblies.
Grounding Clips
Stamped clips that provide electrical contact between boards, housings, panels, shields, or chassis surfaces.
Spring Ground Contacts
Formed conductive fingers or spring elements designed to maintain contact pressure between mating conductive surfaces despite assembly variation.
Chassis Bonding Tabs
Stamped tabs or straps used to establish electrical continuity between panels, enclosures, brackets, or structural members.
EMI Fingers & Contact Strips
Repeating spring-finger features used along seams, openings, or mating surfaces to improve conductive contact and reduce gaps in a shielding path.
Not sure where your part fits?
part design essentials
Reliable shielding and grounding performance depends on how conductivity, contact geometry, enclosure design, surface condition, and assembly conditions work together.
Shielding Geometry & Coverage
Shield effectiveness depends on enclosure continuity, opening size, seam design, material conductivity, and the frequency range being controlled.
Grounding & Contact Resistance
Contact area, surface condition, plating, contact force, and joint design influence the resistance of grounding and bonding interfaces.
Spring Contact Force
Grounding fingers and clips must provide enough normal force for reliable electrical contact without overstressing the material or damaging mating surfaces.
Material & Plating
Conductivity, spring properties, corrosion resistance, solderability, and environmental exposure influence alloy and finish selection.
Seams, Openings & Interfaces
Slots, ventilation openings, panel joints, and enclosure seams can interrupt a shielding path, so their geometry and contact strategy should be considered early in the design.
Edges, Burrs & Surface Condition
Burr direction, edge quality, oxide, coatings, contamination, and plating coverage can affect both assembly fit and electrical continuity at mating surfaces.
from DfM to Production
Gromax supports EMI/RF shielding and grounding programs from drawing review through repeatable production.
Part & DfM Review
Review the drawing, shielding or grounding function, material, contact locations, spring features, tolerances, finish, assembly method, and production volume.
Progressive Die Design & Build
Progressive Die Design & Build — Develop tooling for required blanking, piercing, lancing, embossing, coining, bending, forming, and cutoff operations.
Precision Stamping & Forming
Establish a repeatable process around shield geometry, contact-finger position, formed height, seam interfaces, and critical grounding features.
Plating & Secondary Operations
Incorporate tin, nickel, silver, or other specified finishes together with cleaning, deburring, solderable surface preparation, assembly, or other required secondary processing.
Production Support
Support ongoing programs with tool maintenance, dimensional review, process monitoring, root-cause analysis, and corrective action.
quality & assembly fit
Inspection should verify the features that determine whether the part fits, contacts, and performs correctly in the final enclosure or assembly.
Shield Geometry
Overall dimensions, formed height, wall position, cover fit, and enclosure profile.
Ground Contact Features
Finger position, free height, contact location, engagement, and formed relationship to mating surfaces.
Seams & Interfaces
Alignment, overlap, gap condition, and fit at panel, chassis, board, or enclosure interfaces.
Edges & Surface Finish
Burr orientation, edge condition, cleanliness, plating coverage, and specified coating thickness.
Assembly Fit & Continuity
Gromax checks critical dimensions using standard measurement, fixtures, custom gaging, or functional inspection methods and reviews your certification, traceability, and inspection documentation needs.
Gromax checks critical dimensions using standard measurement, fixtures, custom gaging, or functional inspection methods and reviews your certification, traceability, and inspection documentation needs.
Have an EMI/RF Shield or Grounding Component You’d Like Us to Review?
Developing a new shield, grounding clip, or bonding component, or evaluating another source? Tell us about the application, material, contact surfaces, plating, production volume, and the fit, continuity, corrosion, or shielding issue you need to resolve.
Do not include Controlled Unclassified Information (CUI), ITAR-controlled technical data, or EAR-controlled export-controlled information in your initial email or RFQ submission.
If your request involves export-controlled or regulated technical data, note that in your message and we’ll provide secure transmission instructions.
Customer Confidentiality
& Export Control Notice
To protect customer confidentiality and controlled technical information, Gromax does not publicly display customer-specific drawings, specifications, or sensitive part details without appropriate authorization.
Images shown are illustrative only and are used to represent the types of parts, geometries, and manufacturing capabilities Gromax supports. They do not depict specific customer designs or proprietary technical data.