If you have torsion springs on a self-storage roll-up door, this page should help you. To learn more about how your torsion spring system works, jump down to our Introduction to Self-Storage Roll-up Door Springs. The rest of this page is dedicated to helping you determine what torsion spring you need for your roll-up door. If you are purchasing springs for a self-storage facility, you may want to consider buying in bulk to save both on spring and shipping costs.
Self-storage roll-up doors operate in a similar manner to steel-rolling door springs. Like a steel rolling door, the curtain on these doors wraps around itself as the door opens. The primary difference, however, is that steel rolling doors are made of interlocking slats, while self-storage roll-up doors are just one piece of steel. While steel rolling doors are typically found in heavier commercial and industrial environments, self-storage rolling doors are common in self-storage facilities.
Some smaller self-storage roll-up doors use only one torsion spring, while most larger doors use two torsion springs. Each torsion spring on the door typically has at least one turn when the door is fully open. This extra tension keeps the door open by restricting the curtain from unrolling off the drums.
As you close the door, each torsion spring winds up even more. This extra tension allows the springs to lift extra weight. The extra weight comes from a greater portion of the curtain hanging off of the drums.
When the door is fully closed, the springs have more turns (and thus tension) on them than at any other point in the door's travel. During the last six to twelve inches of travel, the moment arm (the distance from the center of the shaft to the point where the curtain rolls off the drum) is smaller than at any other time while the door closes.
The extra tension in the springs allows the springs to lift more door weight, namely the weight of the un-rolled portion of the curtain. The smaller moment arm, however, decreases the effective weight of the curtain. As a result, the springs lift extra door weight as the door approaches the floor, but the moment arm stays the same. Many times this causes the door to rise a few inches off the ground when you release the door at the bottom of its travel.
It is very important that you order the proper torsion springs for your self-storage roll-up door. You will need to make several important measurements that must be accurate. If you are not careful when you make these measurements, your self-storage roll-up door may not work as it did before.
Some self-storage roll-up door springs are gapped. Gapped springs are rare. A gapped spring that is broken will allow a card or a dollar bill to slip between the coils without stretching the spring. An unbroken spring will be gapped because the bolt at each end stretches the spring, thus separating the coils. When the spring breaks, the coils will normally tighten. If you have gapped springs, make sure that you take the compressed length and that you completely compress the spring when taking the 10- and 20-coil measurements.
You will also need to determine the wind of the spring. This will be either right or left, and it corresponds to the right or left side of the door when you are on the inside.
You also need to verify that your spring has the mini-warehouse ends, as pictured above. These ends come it two styles: in towards the center of the spring or out toward the outside of the spring.
If you want to save money on service calls and time on repairs, replace both springs. If you want to save money on parts, just replace the broken spring.
Once you have measured your spring, enter your information in the form below and click "Go!" Once you have selected the springs that you need and have added them to your shopping cart, continue through the checkout procedure to place your order.
PLEASE NOTE: We currently fabricate 2," 2 1/4," and 2 5/8" miniwarehouse springs at our West Chicago location, and we can usually ship smaller quantities same or next day. If you need larger quantities of springs or springs with different inside diameters, we can ship the springs directly from the spring manufacturer in a day or two.
Huge inventory of torsion springs for same or next day shipping! Here you will find all you need in the most common sizes of 1 3/4," 2," 2 1/4," and 2 5/8" inside diameter springs. Larger 3 3/4" and 6" inside diameter commercial and industrial springs may require a day or two to ship. You'll also find TorqueMaster Springs, Extension Springs, Self-Storage door springs, steel rolling door springs and springs for one piece single panel doors.
Shelves packed with every part you need to fix your doors.
Please note. Shipping times and costs have changed. Normal transit times are currently not guaranteed, even on next day and second day shipments. Shipping prices on items over eight feet have more than tripled.