| Customization: | Available |
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| Function: | Drive, Restoration, Measurement |
| Material: | Steel |
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Various materials including carbon steel, stainless steel and specialty alloys can be used for making spiral springs
They are used in applications eg. electrical motor contact brushes,
The torque available per revolution is linear for the first 360 degrees. If the deflection is greater, the coils often "close out" or come into contact with each other, causing the torque to rise rapidly. 
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