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Micro Extension Springs

Micro extension springs are small-scale tension springs used in compact assemblies where pull-back force is needed, and space is limited. Despite their size, they function just like larger extension springs—storing energy when stretched and returning to their original shape when released.

They are manufactured from fine wire and engineered for repeatable performance in precise, low-load systems. These springs are typically installed in components where movement must be controlled within tight spatial constraints.

Functional Characteristics

Micro extension springs are defined by a few key features:

  • Fine Wire Construction: Built using very thin wire, these springs maintain flexibility without compromising strength. They are suited to applications with delicate movement or small-scale actuation.
  • Consistent Force Output: The spring rate is carefully calibrated to deliver reliable tension, which is essential in systems requiring predictable motion or return.
  • Compact Form: Short free lengths and tight coil diameters allow for use in confined spaces—such as enclosed housings or inside miniature moving assemblies.

Common Applications

  • Wearables – Used in watch bands, fitness trackers, and retractable charging pins.
  • Miniature Robotics – Provides return force in gripper arms, tool changers, or internal mechanical joints.
  • Precision Instruments – Found in pipetting systems, timers, and mechanical gauges.
  • Telecommunications – Maintains stable connection force in fibre-optic connectors or sensor housings.
  • UAVs and Drones – Used in gimbal mounts, payload latches, or lightweight sensor modules.

Custom Micro Spring Manufacturing

Each micro extension spring is designed with specific load, length, and dimensional constraints in mind. At European Springs & Pressings, we offer both catalogue options and fully custom solutions.

Whether you’re working with tight tolerances or high-volume micro assemblies, Get in touch to discuss your requirements—we’ll help you develop the right spring for your compact or precision-based application.

Need something bespoke?

And even if we don’t have exactly the tool we need, European Springs’ in house technology enables us rapidly to design and make complex tools, allowing us to offer more competitive prices.

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