What Is the Difference Between Progressive and Linear Springs?

Posted on March 31, 2020 by IDC Spring

If the products you manufacture involve the use of springs, as so many do, you need to be very careful about the types of springs you use. Spring varieties operate very differently, and choosing the wrong spring for your applications could result in product failure or, at the very least, less than optimal functioning.

One of the questions that may be asked of you with respect to your springs is whether they operate with a linear or progressive rate. Springs that are linear are very different from progressive ones, and it is vital that you understand the difference. Here is the breakdown on linear vs. progressive coil springs.

Linear vs. Progressive Springs

When we talk about linear rates and progressive rates, we are referring to the rate of force acting upon the spring, or “deflection.” Linear rate springs have a uniform rate of deflection because they are the same diameter from top to bottom. So, for example, a spring with a 200 pound per inch linear rate will compress one inch for every 200 pounds of load that is applied. This is true for the entire length of the spring, so after 600 pounds of load, for example, the spring will have compressed three inches.

A progressive spring does not have a constant rate of deflection. For this reason, they are called variable rate springs. In these springs, there is not an equal distance between coils, so the rate of deflection increases as you compress the spring. This type of spring is very popular in vehicle suspension. An advantage of this type of spring is that it can stiffen quickly, meaning it can easily absorb smaller force amounts, but it is also strong enough to handle large force loads. A disadvantage is that you need a longer progressive spring to get the same amount of total deflection as a linear compression spring is capable of.

Order the Linear or Progressive Springs You Need From IDC Spring Today

Now that you know the advantages/disadvantages of progressive vs. linear springs, you need to know where to find the springs you require. The answer, of course, is IDC Spring. We offer every conceivable mechanical spring you are likely to need, customized to your size and material requirements. We have linear rate springs, variable rate springs, torsion springs, extension springs and compression springs of many shapes, including barrel springs, conical springs and hourglass springs.

Our reputation for manufacturing sturdy, reliable springs is so strong that two-thirds of the top 25 manufacturers in the industry call us when they need springs manufactured.

We have springs made of high carbon steel, stainless steel, square wire, round wire and other high-quality materials, manufactured according to the highest standards for safety and durability. Our springs are found across industries, including in agricultural equipment, furniture, garage doors, toys and more.

For more information on progressive vs. linear springs or for a free quote on reliable springs for your business, contact IDC Spring now.