90°C Flexinol® Actuator Spring (0.008" Ø) Crimped with 705 RT

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# of Coils per Spring
Flexinol® actuator springs can be an alternative to straight Flexinol® actuator wires for applications with low force and high travel requirements. These springs can contract and relax multiples of their length. When Flexinol® actuator springs are used within the correct parameters high cycle life is expected.

Transition Temperature: 90°C
Wire Diameter: 0.008" (0.203mm)
Terminal: 705 Ring Terminal 

Tech Data:

Spring Wire Diameter in(mm), Outer Diameter in(mm)SR Cold,SR Hot*Displacement / Coil in(mm)*Resistance on Straight Wire ohms/inch, (ohms/meter)Heating Pull Force** pounds (grams)Cooling Deformation Force** pounds (grams)Approximate*** Current for 2 Seconds Contraction (A)Cooling Time 194°F, 90°C "HT" Wire**** (seconds)
0.008" (0.203mm),
0.054" (1.37mm)
6.5, 3.50.02 (0.6)0.74 (29.13)0.089 (39.3)0.035 (15.94)0.73

*The Stretch Ratio "SR" and Displacement values are typically accurate, but remain approximate values.

** The Heating pull force is based on ~ 25,000 psi (172 MPa), which for many applications is the maximum safe stress for the wire. However, many applications use higher and lower stress levels. This depends on the specific conditions of a given design. The cooling deformation force is based on ~10,000 psi (70 MPa), which is a good starting point in a design. However, this value can also vary depending on how the material is used

*** The contraction time is directly related to current input. The figures used here are only approximate since room temperatures, air currents, and heat sinking of specific devices vary. Both heating and cooling can be dramatically changed (see section 3 of the technical characteristics at http://www.dynalloy.com/TCF1140.pdf for more information.)

**** Approximate cooling time, at room temperature in static air, using a vertical spring. The last 0.5% of deformation is not used in these approximations. HT = High Temperature Flexinol® Actuator Spring.

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