stamped inserts
for overmolding
Find the stamped part family closes to your application
A stamped insert has to survive more than the stamping process.
It needs to load correctly, stay in position during molding, maintain electrical or mechanical function, and fit the finished plastic assembly.
Gromax supports precision inserts, terminals, contacts, leadframe-style parts, and conductive components for molded connectors, sensors, switches, medical devices, industrial controls, automotive systems, and electronic assemblies.
Connector Inserts
Precision stamped contacts or terminals molded into connector housings for electrical connection, retention, and mating performance.
Mold-Loaded Terminals
Stamped terminals designed for manual or automated placement into molds before the plastic molding process.
Sensor Inserts
Stamped conductive or structural inserts used in molded sensor housings where contact alignment, stability, and repeatability are critical.
Leadframe-Style Inserts
High-volume stamped leadframe-style parts used in molded electronic assemblies that need tight contact spacing and consistent geometry.
Overmolded Contacts
Stamped contacts designed to hold position, conductivity, and contact shape through the molding process.
Switch Inserts
Stamped conductive inserts used inside molded switch assemblies to provide electrical pathways, contact surfaces, or mechanical retention.
Grounding and Conductive Inserts
Stamped inserts used to provide grounding, shielding, current transfer, or electrical continuity inside molded electromechanical products.
Medical Cartridge Inserts
Precision stamped inserts used in molded diagnostic, monitoring, sensing, or fluid-management components where small features, clean geometry, and repeatability matter.
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common applications
Stamped inserts are used where insert position, molded-in retention, electrical performance, durability, and production consistency directly affect the finished assembly.
Battery Terminal Fuse
Stamped terminals, contact plates, grounding features, and formed current-carrying members are used in molded battery and power-management components to support current flow, circuit protection, and compact electrical routing.
Automotive Sensor Connector Housing
Stamped inserts and terminals are used in molded sensor housings to provide stable signal, power, and ground paths while holding the contact position inside the plastic body.
Overmolded Temperature Sensor Probe
Overmolded stamped inserts, terminals, and contact features help maintain sensor position, electrical continuity, strain relief, and sealing performance in vehicle sensor assemblies.
Diagnostic Test Cartridge
Precision stamped inserts may support sensing interfaces, electrical contact points, retention features, and compact assembly details inside molded medical diagnostic components.
22 mm Pushbutton Switch
Stamped contacts, spring/contact elements, terminal features, and retention details are used in molded industrial pushbuttons to support switching function, wiring connection, contact alignment, and long service life.
Overmolded Switch Assembly
Stamped contacts, domes, terminals, and retention features are positioned inside molded or sealed switch bodies to support tactile response, electrical continuity, actuator alignment, and long-term switching performance.
when
GROMAX
is a good fit
Insert Position Must Stay Controlled
Contact spacing, terminal height, flatness, exposed length, and alignment may all affect mold loading and final assembly performance.
Carrier-Strip Design Matters
Carrier strips can support:
• Plating
• Reel-to-reel handling
• Mold loading
• Automated feeding
• Orientation control
• Inspection
• Packaging
• Final separation
Molded-In Retention Must Be Reliable
Retention features may include:
• Barbs
• Tabs
• Holes
• Slots
• Embossments
• Coined areas
• Windows
• Undercuts
• Formed shoulders
These features need to resist movement without creating molding or tooling problems.
Burr Direction Affects The Molding Process
Burrs and sharp edges can interfere with:
• Mold loading
• Insert seating
• Plastic flow
• Sealing
• Flash control
• Retention
• Operator handling
• Downstream assembly
Burr direction should be reviewed before tooling is locked.
Plating Must Support The Full Process
Tin, nickel, silver, gold, and other finishes may need to survive stamping, handling, mold loading, heat, pressure, and final assembly.
Plating can also affect fit, contact spacing, solderability, and electrical performance.
Repeatable Production Is Required
Progressive tooling is often a strong fit when the program needs consistent insert geometry, stable carrier design, controlled orientation, and ongoing production volume.
What We Review - Before Tooling Or Quoting
• Insert geometry and tolerances
• Material, thickness, and temper
• Contact spacing and location
• Carrier-strip design
• Mold-loading method
• Retention features
• Burr direction
• Plating type and thickness
• Exposed contact areas
• Plastic flow around the insert
• Shutoff and sealing areas
• Final separation method
• Annual volume
• Inspection method
• Packaging and handling
This helps identify stamping and molding risks before tooling decisions are locked.
What We Review - Common Problems
• Insert movement during molding
• Misaligned contacts
• Poor molded-in retention
• Flash around the insert
• Plastic leakage at shutoffs
• Bent terminals during loading
• Plating damage
• Cracked or distorted inserts
• Burr-related sealing problems
• Carrier-strip handling issues
• Contact-position drift
• Inconsistent insertion depth
• Poor final mating fit
• Assembly fallout after molding
The issue may come from the insert design, carrier, material, tooling, plating, loading method, mold design, or handling process.
Gromax reviews the full path from stamped strip through molding and final assembly.
Design The Insert Around Molding Process
The stamped part and mold should be reviewed together whenever possible.
Important questions include:
• How will the insert be loaded?
• What controls its position?
• Which features create retention?
Where should the burr face?
• Which surfaces must remain free of plastic?
• Will the part stay on a carrier during molding?
• How will it be separated after molding?
• Can the insert move under pressure?
• Will plating affect mold fit?
• How will final contact position be inspected?
Answering these questions early can reduce tool changes and molding fallout later.
Have a stamped insert you’d like us to review?
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Export Control
& Confidentiality Notice
To comply with ITAR, DFARS, and applicable U.S. export control regulations, Gromax does not display actual customer parts, drawings, specifications, or technical data in public-facing materials.
Images shown are illustrative only and are used to represent Gromax’s design and manufacturing capabilities. They do not contain proprietary, controlled, or export-restricted information.