We have everything from small extension springs to large extension springs used throughout industry and privately. The selection of standard extension springs is provided in lengths ranging from 6.35 mm to 377.00 mm (unloaded state).
Electrogalvanised extension springs are made from piano wire, which is then electrogalvanised. This gives the extension springs an attractive, shiny surface. Electrogalvanisation only provides moderate corrosion resistance, but if the spring is used in a humid environment, the service life will be prolonged compared to the same spring made from piano wire without surface treatment.
If you use springs in environments where they are exposed to harsh chemicals or salt water, we recommend springs in a specific type of stainless steel (AISI 316). We do not keep these in stock, but we can custom-produce them on request. Contact us for further information.
If you are unsure about the length/travel you need, we have springs in lengths of 300, 500 and 1,000 mm manufactured specifically to be cut to length and used for prototypes and testing. Sort by lengths using the slider below.
Note: These springs do not have loops. They must be bent up by the customer, following cutting to the desired length, if necessary. To extend the service life, we recommend that the bends are made as soft bends, not sharp bends or notches.
At The Spring Store buying extension springs can be fast and easy. With our easy to read how-to-measure diagrams. and Spring Finder tool you will have the spring you need in no time. All you need to do is input the tolerances you would like your spring to have. We know how complicated it can be to find the spring you need in other online stores, but we aim to make finding your extension spring easy.
The tension spring is one of the most widely used springs and can be found in all kinds and sizes, as trampoline springs for instance. These springs are manufactured mainly from spring steel or stainless spring steel. You can easily order your extension spring online. You can choose from the following types of materials:
All tension springs are manufactured in accordance with default DIN standards and can be delivered from stock. Do you want to purchase extension springs These will be delivered to you within 3-8 days.
Extension springs are used in a wide variety of applications where a precise amount of force is required at a certain deflection. Extension springs are used to retract aircraft landing gear, to tether equipment to oil rigs in offshore applications, and on Class 8 heavy trucks as hood-assist springs to safely hold the hood in place for engine maintenance. Other examples include specialized springs implanted in roadways or around secure buildings to create barriers to provide additional protection from possible outside threats. They can range dramatically in length (from 1/2-inch to 50 feet) and in the force they create (from a few ounces to thousands of pounds).
MW specializes in custom fabrication of extension springs and has vast manufacturing capabilities beyond our competitors; whether you require a spring with extreme length, heightened performance, or quality certified products, we have you covered.
We also offer a variety of treatment and finishing options for custom springs made from standard or specialty materials. Certifications of conformance for geometric tolerances for stock springs are available upon request. Material certifications are available for custom springs.
The ends on the extension springs offered in our stock inventory are the common machine-made hook and full-loop configurations. The hooks or loops may have an across center transition of the last coil before forming the hook or loop. The angle between hook/loop planes (end position) is random. If you need a specific end configuration, contact us for design support and quoting.
Extension springs in 4280 spring sizes for fast delivery from stock made of normal steel EN 10270-1 and stainless steel EN 10270-3-1.4310 from Gutekunst. The extension springs are made of round spring steel wire in a cylindrical shape with a 1/1... read more... Extension springs Catalog Extension springs in 4280 spring sizes for fast delivery from stock made of normal steel EN 10270-1 and stainless steel EN 10270-3-1.4310 from Gutekunst. The extension springs are made of round spring steel wire in a cylindrical shape with a 1/1 German eyelet on each side and a linear spring characteristic in quality grade 2 (medium tolerance range) according to DIN EN 15800. Simply select the right tension spring in the spring shop and order it directly from Gutekunst via the shopping cart. CAD data, data sheets and spring characteristic diagrams are available for each extension spring.
Extension springs made of normal steel are lightly oiled after the thermal treatment. Stainless steel extension springs are not treated any further after the thermal treatment. Additional surface treatments of the extension springs have the disadvantage that the application of the surface is only possible with great effort due to the pretensioning of the spring body. Here, the choice of a suitable spring material is preferable to subsequent surface treatment. In this case, contact email@example.com .
Our extension springs are right-wound as standard (clockwise). A 1/1 German eyelet according to DIN 2097 is bent at both ends of the spring body. The eyelets have no opening in stock (m = 0). However, we can cut open an eyelet opening at short notice if necessary.
Each extension spring is available from stock with 2 different loop positions. One loop position is 180 degrees (article numbers with the letter \"I\"). The other position is 270 Graf (article numbers with the letter \"X\").
All metal springs are quality checked. This is done in our testing department, which is independent of production. The testing of the tension springs offered in the catalog range is carried out in accordance with DIN ISO 2859-1 test level II. The procedure is based on the single sample plan for normal tests with test severity AQL = 1.0. If necessary, we can carry out and document all test regulations up to and including individual tests. We offer the following factory certificates for each test item.
The calculation of the tension springs was carried out according to EN 13906 Part 2. The specified tolerances for the tension spring correspond to quality level 2 from DIN EN 15800. In order to be able to adhere to the tolerated dimensions, a production compensation is made via the preload (F0) or the mean coil diameter (D).
The extension springs can be used with the specified distances and forces for static or seldom loads. In all other cases, a mathematical check of the application should be carried out. Since the attachment point of the eyelet is the critical point for possible breaks in extension springs, the stresses occurring there must be checked. Often it can be done by choosing another loop shape a longer service life can be achieved.
Please note that the item prices for individual spring production are relatively expensive for smaller quantities of up to 7 pieces. With larger quantities, the unit prices for individual metal springs are significantly lower.
Residential Use Only. Extension spring cable for a garage door 7ft tall or less. Cable size: 3/32\" 7x7 Length 156\" If you are ordering extension spring cables, it is recommended to install/replace the safetey cables at the same...
Residential Use Only. Safety cable for a residential garage door with an extension spring application.Cable Size: 3/32\" 7x7. Length: 120\" Replacing garage door cables require the tension on the counterbalance spring...
Many extension spring weights are indicated by the color code painted on the end of the spring. However, spring manufacturers can use different color codes to indicate a specific pulling weight of an extension spring. When ordering extension springs, refer to the color code on the end of the springs but it recommended not use this color code system as the only way to determine the correct extension springs to order. It is recommended to weight the garage door to be accurate as to what extension springs to order.
Measure the height of the garage door. All extension springs sold on our online parts store at www.OverheadDoorPartsOnline.com/extension-spring/ accommodate a garage door 7 ft high or less. If your garage door is taller than 7 ft, please call our helpdesk at 1-800-731-0261 for assistance.
For a one car garage door, carefully lower the garage door onto a bathroom scale in the center of the garage door. Read the scale. The weight that shows on the bathroom scale is the size extension spring you need to order.
For a two car garage door, carefully lower the garage door on to two bathroom scales. Each scale should be located approximately two feet from each side. Read the scales. Add the weight of the two scales together. The sum of the two scales is the size of the extension spring you need to order.
Tension springs also known as extension springs or traction springs are coil springs, normally tightly-wound, that are loaded in tension. This type of springs is designed to bring components together and reacts to an axial force that tends to extend its length, with or without initial tension.
Tension springs are made starting from a circular cross-section wire, helically wound around an axis, with contact coils and with eyelets at the endpoints also called loops which are attached to components. If these components are moved or pulled apart, the spring opposes this extension, exerting a force to bring them together.Extension springs are used for several purposes: 59ce067264