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Spring Essentials – Why are Springs Pressed?

by | Jan 1, 2007 | Articles, Springs Magazine

In a past Spring Essentials column, I listed many of the common spring steels and some of their properties (“The Quick and Easy Material Review,” April 2006). There is no one best material for springs. That’s because the applications for springs are so diverse that no one type of material can be made to function in all situations. Some materials are economical and are great for springs that perform the simple, basic function of returning something back to its original position. Other springs work in extreme heat or cold, or highly corrosive conditions. These applications require more expensive exotic materials to assure the spring’s survival in a harsh environment.

“Increasing pitch and not making any other changes will increase the overall stress levels of the spring when it’s deflected.”

Figure 1

Figure 1: Safely Stressed spring. Pitch is low, so there is no set at solid height.

Figure 2

Figure 2: Highly Stressed spring. It’s the same spring as in Figure 1, but the pitch is high (longer free length), so the spring will take set at solid height

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