stamped & formed mechanical pins
Built for joining, hinging, retention, alignment, and controlled movement.
Gromax manufactures stamped and formed mechanical pins produced from strip or sheet material for use in conveyor systems, hinges, linkages, retaining assemblies, and other mechanical applications.
We review material, cross-section, forming method, fit, wear surfaces, retention features, tolerances, and assembly requirements to support repeatable production.
part examples
Conveyor Belt Hinge Pins
Formed metal pins used to join belt sections or engage hinge-style belt fasteners while allowing articulation through the conveyor system.
Formed Hinge Pins
Strip-formed or profiled pins used as pivot or hinge members in guards, covers, mechanisms, and other moving assemblies.
Retaining Pins
Formed pins designed to capture, locate, or prevent unintended movement of mating components within an assembly.
Locking & Captive Pins
Pins with formed shoulders, flats, tabs, stops, or other features that help retain the pin in its intended position after assembly.
Rolled & Slotted Pins
Pins formed from strip into cylindrical or near-cylindrical profiles for applications where compression, interference, or radial retention is required.
Link & Connector Pins
Mechanical pins used to join links, plates, tracks, chain-like assemblies, or other components where fit, alignment, and repeatable movement are important.
Not sure where your part fits?
part design essentials
Reliable pin performance depends on how the material, formed geometry, fit, retention method, and mating assembly work together.
Cross-Section & Formed Geometry
Round, partially rolled, channel-shaped, flattened, or profiled sections can influence stiffness, fit, contact area, and how the pin engages mating components.
Fit & Clearance
Pin width, diameter or effective profile, straightness, and mating-hole or slot dimensions determine whether the assembly rotates, slides, locates, or retains as intended.
Material & Thickness
- Strength, toughness, formability, wear resistance, corrosion resistance, and required spring characteristics help determine alloy, thickness, and temper.
Retention Features
Tabs, shoulders, flats, formed stops, grooves, expanded sections, or end features can help control axial movement or keep the pin captive within the assembly.
Forming & Springback
Rolled or bent sections must account for material springback, grain direction, tooling geometry, and accumulated forming strain to maintain consistent final shape.
Wear & Surface Condition
Contact pressure, articulation, sliding motion, burr direction, surface finish, and any coating or plating should be considered where the pin moves against mating components.
from DfM to Production
Gromax supports stamped pin programs from drawing review through repeatable production.
Part & DfM Review
Review the drawing, function, material, cross-section, fit, retention method, tolerances, finish, mating components, and production volume.
Progressive Die Design & Build
Develop tooling for the required blanking, piercing, notching, coining, rolling, bending, forming, and cutoff operations.
Precision Stamping & Forming
Establish a repeatable process around critical pin dimensions, straightness, formed profile, retention features, and relationships between functional surfaces.
Secondary Operations & Finishing
Incorporate heat treatment, deburring, plating, coating, machining, grinding, assembly, or other secondary operations when required by the application.
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 characteristics that determine whether the pin fits, retains, and moves correctly in the finished assembly.
Pin Geometry
Length, width, thickness, effective diameter or profile, straightness, and overall formed condition.
Formed Cross-Section
Rolled diameter, channel profile, bend geometry, seam condition, or other formed relationships that affect fit and stiffness.
Retention Features
Tabs, stops, shoulders, flats, grooves, end forms, and other features used to control position or axial movement.
Fit & Alignment
Clearance, interference, mating position, engagement length, and alignment with holes, slots, links, or hinge features.
Movement & Wear Surfaces
Free movement, articulation, sliding contact, edge condition, burr orientation, and surface finish where the pin interacts with mating components.
Gromax checks critical dimensions using standard measurement, fixtures, or custom gaging and reviews your certification, traceability, and inspection documentation needs.
Have a Stamped or Formed Mechanical Pin You’d Like Us to Review?
Developing a new pin or evaluating another source? Tell us about the application, material, cross-section, fit, retention method, finish, production volume, and the wear, alignment, movement, or quality 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.