Contact springs are manufactured utilizing OMNI Engineering, Inc.’s advanced micro miniature metal stamping capabilities. The customer’s original design required the use of multiple wire welded components. By utilizing our design and tooling capabilities we were able to lower cost, increase productivity, and improve quality with a one piece component. The contact spring is a component for use in trimming potentiometers. Several variations are manufactured: contact springs are stamped from 302 stainless steel and/or C7700 nickel sliver alloy. Other variations are stamped using C17410 beryllium copper / paliney 6 inlaid material. The parts are stamped using 2 up carbide progressive dies in high speed Bruderer presses. We currently stamp more than 100 million parts annually, holding dimensional tolerances of +/-0.0005, and angular tolerances of +/-1/2 degree. Quality is verified through dimensional, gram force, camber, and visual inspections. Real time SPC data is collected during manufacturing and data is supplied with each shipment.

To learn more about this project, or the processes used to manufacture it, see the table below or contact us directly.

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Custom Stamping Product Description

Contact Springs for Trimming Potentiometers

Miniature / Micro Miniature Capabilities Applied / Processes

Miniature / Micro Miniature Stampings
Precision Metal Stampings

Equipment used to Manufacture Part

22 & 30 Ton Bruderer Presses
Carbide Progressive Dies

Overall Part Dimensions

Thickness: 0.0020 – 0.0040″
Width: 0.044″ to 0.170″
Length: 0.054″ to 0.206″


Dimensional: +/-0.0005″
Angular: +/- ½°

Material Used

302 Stainless Steel
C7700 Nickel Sliver Alloy
C17410 Beryllium Copper Alloy / with Paliney 6 Inlaid

In process testing / Inspection performed

Dimensional Inspection
Gram Force Inspection
Camber Inspection
Visual Inspection
Real Time SPC Data Collection / Reporting

Industry for Use

Electronics Industry
Medical Industry


30,000 – 100,000,000 annually

Delivery / Turnaround Time

Dependent on Material Availability

Delivery Location

United States
Central America

Standards Met

Customer Specifications
2D CAD Drawings
RoHS – REACH Compliant

Product Name

Contact Springs