Helical coil extension springs are stretched along their axis of winding and exert a pulling force. They must have a hook or some other arrangement for attachment and are made in a variety of end styles to fulfill this requirement. Most extension springs are wound with an initial tension. This tension holds the spring coils wound together. This tension can be manipulated to achieve the load requirements of your particular application. The combined resources of Michigan Spring and Stamping are unsurpassed in the development and manufacturing of all types of extension springs, including:
- Single-Wound
- Dual-Wound
- Hooked-End Type
- Looped-End Type
Material Types
We work regularly with the broadest range of materials, including:
- Carbon-based spring steel (music wire, chrome silicon, hard drawn and oil tempered)
- Stainless steel (types 302, 304, 316, 17-7, and medical grade)
- Phosphor bronze and beryllium copper
Wire Diameters
We have developed springs of all sizes. The most common applications fall into the range of .005” to .090” (.12mm to 2.3mm). Square, rectangular, and special shape material also available.