A spring not as strong will have less stress and more safe travel. The stronger and stiffer the spring, the more stress it is being put through, thus giving you less travel. The force chart to the right explains the adjustments you can make to your spring design to increase or reduce its force. It is imperative that you Never go past a spring's elastic limit because if you do the spring will take a permanent set because you overstressed the physical limits of the spring. In other words we just ruined our spring because we will no longer reap the benefits of a spring with long life because we went past its max safe travel. Why? Because you went past its elastic limit (max safe travel) and the spring “took a permanent set” and will never return to its original free length. The spring only returns to a 0.750 Free Length. We release the load on the spring and since we went past our max safe travel distance of 0.250 our spring “took a permanent set” and will not return to its original Free Length of 1.000. We clearly went past the max safe travel by 0.250. We compress the spring past 0.250 travel all the way to 0.500 which happens to be our solid height. We have a compression spring that has a 1.000 Free Length with 0.250 max safe travel. Therefore both refer to how far a spring can go safely, without suffering damage.įor Example on Compression springs. If the spring is pushed past this limit it "takes a set." Elastic Limit and Maximum Safe Travel are synonyms. The elastic limit of a spring (maximum safe travel)is the distance a spring can safely compress, extend or torque. Since each spring design is different, it is very important that you know the elastic limits of the specific spring you are using. Springs can be compressed, extended, or torqued to a certain point before they go past their elastic limit. This is why the following article will explain the importance of respecting the maximum safe travel and max load so that you don´t permanently damage your compression spring. These terms are all related to the importance of respecting the limits of deflection that each spring has. When it comes to springs, the terms “maximum safe travel”, “elastic limit” and “taking a set” can be a little confusing to understand because they are all related.
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