Nitinol Micro-Springs
Select Pitch and Transition Temperature below to add to cart.
[product_table columns=”name,att:wire-sizemm,
KRL micro springs are the smallest nitinol springs–and the lightest actuators available anywhere! So, if you’re looking to build something small, KRL is the place to go!
Spring mandrel size (spring inner diameter) equal and smaller than 3.2mm is defined as Microspring.
The listing price is for per 5mm. If multiple units are ordered, a continuous length will be sent out unless said otherwise in the comments box during check out.
For bigger Springs, please check “Helical Springs” listings.
We use Mandrels to wrap springs, so mandrel size is the inner diameter of the springs. Other than what shown on the table below, other mandrel size can be made, contact us for customization.
Pitch is the distance between the center of adjacent wraps. We have 4 pitch sizes order-able online, but any pitch size can be made, contact us for customization.
| Name | Austenite Finish
Transition Temperature(°C) |
Effect |
| SuperElastic | -15 | Springy in room temperature |
| Air Temp | 20 | Soft in cool environment(freezer, ice water…) and change to set shape when brought to room temp. |
| Body Temp | 35 | Soft in cool environment(freezer, ice water…) and change to set shape when held in hands. |
| Standard Temp | 45 | Soft in room temperature and change to set shape when heat to 45°C and above. |
| High Temp | 80 | Soft in room temperature and change to set shape when heat to 80°C and above |
The micro-springs listed in the catalog below are all NiTi. But other alloy types are also available. Contact us for customization.
| Alloy | Effect |
| NiTi | Regular |
| NiTiCu | Low Hysteresis |
| NiTiFe | High Strength |