> For the complete documentation index, see [llms.txt](https://delta-robotics.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://delta-robotics.gitbook.io/docs/hardware/nitinol.md).

# NiTiNOL

Delta Robotics Nitinol product line, straight-annealed shape memory alloy wire and precision tension springs, plus how to mount, wire, and train them

Nitinol is the shape memory alloy at the heart of every Delta muscle: heat it and it contracts, let it cool and it relaxes. We sell it on its own, as straight-annealed wire and as precision tension springs, so you can build your own actuators from the same material our ThermoFlex muscles use. Train it to a shape, drive it with current, and it moves.

This section covers the wire and spring products, how to mount and wire them, and where to go to learn the materials science and training methods behind them.

## Products

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Wire</strong></td><td>Straight-annealed Nitinol wire in several diameters, with force, resistance, and cycle-life data.</td><td><a href="/docs/hardware/nitinol/wire.md">Wire</a></td></tr><tr><td><strong>Spring</strong></td><td>Precision tension springs that contract when heated, pre-mounted and ready to drive.</td><td><a href="/docs/hardware/nitinol/spring.md">Spring</a></td></tr><tr><td><strong>Mounting and wiring</strong></td><td>How to anchor Nitinol, connect it electrically, and pre-tension it for a long life.</td><td><a href="/docs/hardware/nitinol/mounting-and-wiring.md">Mounting and wiring</a></td></tr></tbody></table>

## Learn the material

New to shape memory alloys, or want to shape your own wire? The Learn section has the background and the how-to.

* [What is Nitinol?](/docs/learn/nitinol-faq.md): Phases, transitions, and material properties.
* [How to Train Nitinol](/docs/learn/how-to-train-nitinol.md): Shape-set your own wire, from hobbyist to lab methods.

## Related pages

* [Wire](/docs/hardware/nitinol/wire.md): Specs and data for the wire.
* [Spring](/docs/hardware/nitinol/spring.md): Specs and data for the springs.
* [TF Node Controller](/docs/hardware/thermoflex/tf-node-controller.md): Drive Nitinol with precise current.