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W.B. Jones Spring Co., Inc.
140 South St.
Wilder, KY 41071

Fax: 1-859-581-7700

SMI Founding Member

WM Jones corporate video

Springs Fast Since 1913


Find Your Die Compression Springs the Easy Way

Posted on August 23, 2016

W.B. Jones supplies die compression springs to meet a wide range of application needs. The rectangular shape of the material used for our die compression springs is designed to achieve the greatest possible load for a given amount of travel. Die compression springs are commonly used in die press applications, but can be used for any job involving a heavy load. All the ends are closed and ground.

To make springs easier to identify and evaluate, W.B. Jones die compression springs are color coded for easy identification from one strength to the next. Starting on page 28 of our catalog, we organize our die compression spring selection in an easy to follow chart.


The W.B. Jones die compression spring chart lists springs from lightest to heaviest load capabilities and categorizes them by color: Blue (35% of free length), Red (25% free length), Gold (20% of free length), Green (17% free length). They are organized by hole/rod size and then by the overall length, with the OD being be slightly smaller than the hole spec and the ID will be slightly larger than the rod diameter. The overall spring length will be slightly longer than what is listed for die compression springs, due to the need for set removal, or scragging.

Our 500 series dies compression springs are made from carbon steel, which is slightly less strong than the chrome silicon that is used for all of our other die compression springs.  Another difference with the 500 series is that these springs are not colored.

Have an application that requires the strength of die compression springs? W.B. Jones has over 100 years’ experience providing quality die springs, both stock and custom to meet your needs.

Die Springs Perform Under Stress

Posted on August 23, 2016

Die springs are a variety of heavy duty compression springs designed for use in high stress, heavy load applications. They are fabricated from rectangular shaped material to reduce the solid height and increase efficiency.

Die springs are well-suited for assemblies requiring high force within limited installation dimensions. When specifying die springs, the factors to look at are working hole and shaft diameter. Since sufficient space is necessary for the die spring to function without hindrance, the critical measurement is the area within which the die spring works, or working hole, rather than the measurement of the actual die spring.

When working with die springs, keep in mind that the maximum travel should not be used or exceeded, otherwise the service life of the die spring will be considerably lessen. Die springs should always be installed pre-tensioned to avoid shock loads.

When specifying die springs, here are some important considerations:

  • Consider how the die spring will be used. Will it be used for short runs, or will it need to withstand extreme stress and rapid cycles?
  • Depending on the amount of space available, use as many die springs as possible with a minimal amount of deflection, and staying within the ideal operating range.
  • Match the die spring with the proper hole and rod size to reduce the chance of buckling and spring failure.
  • Be sure that preventive die maintenance includes replacement of die springs at recommended intervals, to reduce the likelihood of operational downtime.
  • Replace all die springs at the same time to assure even load distribution.
  • Never rework die springs by grinding the inside or outside diameter, or by cutting off coils – doing so could damage the die or cause premature spring failure.

Have an application that requires the strength of die springs? W.B. Jones has over 100 years’ experience providing quality die springs, both stock and custom to meet your needs.

Steel Springs

Posted on August 9, 2016

custom steel springsLooking for a source for steel springs? An experienced and fully capable U.S. spring manufacturer, W.B. Jones can meet your steel springs requirements, from design and fabrication, to finishing processes and fast delivery.

Have a steel spring you are trying identify? Figuring out the right spring material and specifications doesn’t have to be complicated. Extensive experience enables our team to quickly determine the best spring option for your needs.

Only need a few steel springs? Or just need help finding a stock spring that will work for your application? W.B. Jones has over 5000 springs in stock – wire ranges from .007 to .500, typical OD’s .088″ to 5″, lengths from .125 to 10 ft. If you require custom steel springs, we can meet your needs and do not require a minimum quantity.

Need steel springs fast? Contact us – our team can help. We can ship stock springs out in 1-3 business days and as quick as 5 days for custom springs.

Types of steel springs we offer include:

Steel Spring Applications

Typical steel spring applications include power equipment, retractable safety devices, tape measures, timing devices, toys, fitness equipment, and gardening equipment. Steel springs are widely used in many industries including medical, automotive, oil and gas, telecommunications, textiles, agriculture, electronics, military, and aerospace.

Steel springs are made from tempered wire. The different wire diameters are created by a drawing processes. Wire starts as a 100 to 1000 pound bar about 2” in diameter and is continually drawn through smaller dies to reduce it to the required diameter. This processes enhances the tensile strength of the metal.

The most commonly used types of steel in spring fabrication are carbon steels and stainless steels. Traditionally, manufacturers will use music wire because of its high carbon content. This creates better quality and more uniform steel springs. One down side to music wire and other carbon steels is that they rust. If the springs will be exposed to wet environments, it may be best to use a stainless steel since it is corrosion resistant. It is important to note some types of stainless are slightly magnetic in spring tempered form.

Contact us to discuss your steel spring needs.

The 6 Most Commonly Used Spring Materials

Posted on July 26, 2016

An astounding number of springs are put to work in the world around us every day. Depending on the industry and application in which they will be used, springs are manufactured in a broad range of sizes and configurations.

Given the diversity of spring applications, it might be surprising to learn that springs are most commonly made from only six basic types of materials. These include: music wire, hard drawn MB, oil tempered wire, stainless steel, phosphor bronze, and brass. Each of these material types offer specific and unique characteristics that are well-suited to individual uses and work environments.

To provide an overview in guiding spring material selection, we have developed a helpful and informative video explaining spring material options. We invite you to watch this video to learn more about spring materials, or call us to discuss your spring needs!

Understanding Wire Types Video

Torsion Spring Design Made Easy with Advanced Spring Design Calculator

Posted on July 26, 2016

Torsion spring design is straightforward and simple with a software product called ASD7. This Advanced Spring Design ASD7 calculator determines torsion spring rates and loads based on user-input specifications. This tool is also capable of back-solving torsion spring designs for any specified variable.

Developed by Universal Technical Systems and the Spring Manufacturers Institute (SMI), the ASD7 spring design calculator brings together the benefits of engineering knowledge and precision calculations to facilitate the design of reliable, quality torsion springs. SMI acceptable tolerances and maximum safe loads for torsion springs are provided, as well as alerts to potential design flaws such as overstressing or limitations in working space.

Designed in an entirely graphical environment, ASD7 is user-friendly and offers automatic unit conversion, as well as convenient and quick access to dynamic plots and reports. Another feature is a torsion spring materials database, which can be added to by the user. A profile system for saving and incorporating frequently used torsion data sets and exportable DXF torsion springs drawings are additional perks that come with the software.

The ASD7 design calculator can be used for more than torsion springs. The software can also be used in the design of compression springs, spiral forms, extension springs, garter springs, snap rings, washers, beams, and torsion bars.

W.B. Jones is expert at using this technology to design Torsion Springs. Let us design one to meet your exact specifications.

Do You Speak Compression Springs? Understanding Compression Spring Terminology

Posted on June 24, 2016

The process of ordering the right compression springs for your application begins with understanding spring terminology. Knowing the basics will not only help you take accurate measurements of your spring, but it will also ease the communication of your spring needs to our sales team. Both of which will aid in getting you the right spring for your application and lessen the chances of spring failure.

Here are just a few common terms to get you started with your first lesson in compression spring terminology:

Active Coils: Those coils which are free to deflect under load. (i.e. the coils with space in between)
Buckling: Bowing or lateral deflection of compression springs when compressed.
Close Wound: Coiled with adjacent coils touching. (i.e. no space between the coils)
Deflection: Movement of spring ends under the application of force.
Free Length: The length of a compression spring in the unloaded position.
Load: The force applied to a spring that causes a deflection.
Pitch: The distance from center to center of the wire in adjacent active coils.
Rate: Change in load per unit of deflection, generally given in pounds per inch.
Total coils: Number of active coils plus the coils forming the ends.

As an experienced spring specialist, W.B. Jones has compiled an extensive glossary of spring terms, providing you with a quick and handy reference for brushing up on the most widely used spring descriptors.

In all that we do, our goal is not only to provide the industry’s highest quality springs, but also to provide our customers with the best possible service. We are here to help you understand everything you need to know about the springs that will best meet your application needs. Contact us to discuss your project!

Spring End Types

Posted on June 24, 2016

There are different options available when selecting spring end types. Your choice depends on the application in which the spring will be used. If the job requires it, a spring can have two different end types. In order to choose the right end type or types for your springs it is important to understand each end type and how they function.

The type of ends affect the pitch, solid height, number of active and total coils, free length, and seating characteristics of the spring. Selecting the right end type for your springs begins with getting to know the basic end types available.

Compression Spring End Types

There are two basic end types used for compression springs – closed and open. Each option offers the choice of either ground or not ground ends. The most widely used type is a closed or squared off end type. In the case of closed ended springs, the space between the last two coils is minimal so that the coils actually touch and it sits flat. Conversely, open ended springs are not squared off and tend to need some form of support, such as a rod. Open ends are usually only specified in special applications. Grinding the ends of compression springs helps springs sit more flat to reduce buckling. Grinding is a secondary operation, and therefore makes springs more expensive.

Watch our video on compression spring end types

Extension Spring End Types

Hooks and loops are the two basic end type options used with extension springs. Loops are fully closed all the way around, and hooks have a gap. In most cases, stock extension springs are made with loop ends. If a hook is required, a gap can easily be cut in the loop to create the hook. Hooks and loops are available in a few different style options to match application needs. The most widely used end styles for extension springs are crossover, machine style, side style, and double loop ends.

Watch our video on extension spring end types

Torsion Spring End Types

In the case of torsion springs, the most common and versatile end type is a plain straight leg, with no bends. Customized designs are available for applications that require a torsion spring with bends.  A sample, print, photo, or sketch is all that a good spring manufacturer will require to determine the torsion spring design that is needed.

Watch our video on torsion spring end types

Stress Primary Reason for Extension Springs Failure

Posted on June 8, 2016

The most common cause for extension spring failure is the flawed design that leads to an overstressed spring. Exerting too much stress, or force, than allowed by design can trigger the spring to break or take set.  For example, an extension spring that is intended to be strong will have very little elasticity. If stretched out too far, it becomes highly stressed and susceptible to breakage. The damage can happen at the spring body or at the spring ends.

In dealing with extension springs, the ends are more fragile than the body. As the loops or hooks are formed, the wire is bent upward and the diameter of the ends is slightly reduced. The bend and smaller diameter creates a considerable concentration of stress. A properly engineered spring will take this concentration into account as it leads to premature failure.

If a spring is failing due to overstressing, it is likely the spring design needs to be changed. Here’s are common adjustments:

  • Increase the outer diameter
  • Decrease wire diameter
  • Add more coils by making the body length longer

To avoid extension spring failure, it is important to provide accurate information about what is required. That ranges from the required extended length to the required load to the actual measurements of an existing spring. The more precise the details provided the less likely spring overstressing will occur. For more information about how to measure an extension spring or what information is needed, visit our custom extension springs page.

Other reasons for failure, apart from a flawed spring design, are unforeseen environmental implications and improper installation.

To be assured your extension springs are designed correctly for your application, please contact the spring design specialists at WB Jones.

How to Measure Extension Spring Dimensions in Four Easy Steps

Posted on June 8, 2016

A successful spring application involves the installation of the right spring for the job. Measuring the dimensions of an existing extension spring is not difficult at all. All you need are the right tools and our easy-to-follow instructions.


  • Micrometer
  • Calipers
  • Ruler or tape measure  – for large springs


  1. Measure the wire diameter.
    It is recommended that you measure the wire diameter in two different spots using a micrometer and take the average. This will allow for precise readings and accurate ordering.
  2. Measure the outside diameter.
    Commonly referred to as “OD”, whenever possible, you should measure for the outside diameter in the middle of the spring because the end coils tend to run large.
  3. Measure the body length.
    The body of an extension spring is considered the coiled portion. It does not include the hooks or loops. For larger springs you may use a ruler, but for smaller springs, using calipers or a micrometer is the preferred option.
  4. Measure the overall length of the spring.
    This is the length over the top of each end or outside to outside.

Want to see how it’s done? Watch this step-by-step How to Measure Extension Springs video:

Once you have the dimensions for your extension spring, you can use our easy-to-use online form to request a  quote. Remember, if you have an unusual spring is not easy to measure, you can speak to a member of our team for identification and ordering assistance.

About Extension Springs

Posted on May 4, 2016

Extension springs are designed to absorb and store energy by offering resistance to a pulling force. As an extension spring is slowly stretched, tension force is resisted, as the spring attempts to return to its original coiled position. The greater the extension of the spring, the higher degree of resistance it will have. Extension springs are used in the design of a wide range of products, including garage doors, screen doors, scales, toys, trampolines, medical devices, tools and more.

Typically closed wound, extension springs are most often cylindrical in shape, but end styles can vary greatly. They can be engineered to accommodate different loads, applications, or specific conditions by varying the size of the coil, the size of the wire or even by the length of the extension springs. Like most spring types, extension springs are developed from a wide range of materials, depending on the application requirements, which might include factors such as stress, temperature, and corrosive environments.

As a spring manufacturers with comprehensive fabrication capabilities, W.B. Jones can custom manufacture extension springs to precise specifications. W.B. Jones design specialists assist buyers in ordering custom extension springs, making sure that the springs meet all of application needs and work within the established budget.  All W.B. Jones springs are manufactured in the U.S., and most custom orders ship within 5 to 10 business days. We also carry a wide range of stock extension springs and assortments that ship within 1-3 business days.

W.B. Jones has over 100 years’ experience providing quality extension springs, both stock and custom to meet your needs. Our team will work from new or existing custom designs to deliver the extension springs you need.