Custom Extension Springs
Stalder Spring is an industry leader in the engineering and manufacturing of custom extension springs, such as carbon steel or stainless steel extension springs. These kinds of springs are designed specially to absorb and store energy as well as resist a pulling force.
The initial tension dictates how firmly an extension spring is coiled. Specific requirements for applications can be reached by tweaking this tension.
Due to their particular characteristics, extension springs are used in a number of these industries, including:
- Agriculture
- Manufacturing
- Construction
- Petrochemical
Customer Service First
2–4 Week Turnaround Time
No Job Size Too Big or Too Small
Material Types
At Stalder Spring, we think outside of the box to provide our customers with custom extension springs that other companies may not be able to fabricate. In the past, we have even built our own machines for particularly tricky jobs. We aren't a job shop or stock extension spring manufacturer, but a company that forms long term working relationships with our clients. We go as far as keeping client springs in stock so that we can offer shorter turnaround times on future orders. Our world-class technicians and machines have the capacity to work with almost any material, but most commonly we fabricate:
Industries & Applications
Over the almost 75 years that Stalder Spring has been in business, we have formed a significant customer base across a range of industries. Some applications include:
Planers
Hay Balers
Combines
Foklifts
Semis
Vice-Grip Pliers
Wire Diameter Ranges and Materials
At Stalder Spring Works, we pride ourselves on delivering precision-engineered springs that meet the diverse needs of our clients across industries. Our ability to customize wire diameters and material choices ensures every spring is optimized for its specific application.
- Wire Diameter Ranges: From 0.018" to 0.250" for standard sizes, with specialty sizes up to 0.562".
- Materials: Options include stainless steel, music wire, and other high-quality materials to suit various environments and performance demands.
Finishing Services & Sizing Options
Stalder Spring also offers an array of finishing services. To do this efficiently, we work with third party vendors who we have developed relationships with over the years. The finishing services we frequently provide include:
- Powder Coating
- Zinc Plating
- Oil
- High Corrosion Resistant Coatings
- Mechanical Zinc Plating
- Black Oxide
The Difference Between Compression Springs and Extension Springs
Understanding the distinctions between compression and extension springs is essential for choosing the right solution for your application. Both serve to store mechanical energy but differ in how they function and the forces they handle.
Compression Springs: Absorbing Compressive Forces
Compression springs are designed to compress under load, storing energy as the coils are pushed together. They return to their original shape when the load is removed, making them ideal for applications that require shock absorption, load-bearing, or cushioning.
- Force Direction: Handles compressive forces.
- Applications: Automotive suspensions, industrial shock absorbers, medical devices, and construction equipment.
- Design Options: Common shapes include helical, conical, and barrel for specific needs.
Extension Springs: Managing Tension Forces
Extension springs store energy when stretched and are used in systems that require precise tension and resistance. Equipped with hooks or loops, they connect components that need controlled movement.
- Force Direction: Handles tensile forces.
- Applications: Agricultural machinery, robotics, material handling, and large trucks.
- Key Feature: Most extension springs have initial tension to ensure a tight fit, even at rest.
Key Comparisons
Compression and extension springs differ primarily in how they handle forces and store energy. While compression springs resist forces that push the spring together, extension springs are designed to withstand forces that pull the spring apart. These differences influence their applications, design, and end configurations.
- Force Type: Compression springs handle pushing forces, while extension springs handle pulling forces.
- Energy Storage: Compression springs store energy when compressed; extension springs store energy when extended.
- End Types: Compression springs often have flat or ground ends, while extension springs feature hooks, loops, or custom ends.
End Types We Fabricate
As a trusted compression extension spring manufacturer, we understand that the performance and functionality of extension springs are heavily influenced by their end types. Each design serves unique applications, ensuring durability and efficiency for specific systems.
Below are the types we fabricate:
- Machine/German Hooks:
A robust and straightforward hook design for general-purpose use. - Overview: The most basic type of hook, offering simplicity and durability.
- Advantages: Easy to produce and reliable under load.
- Applications: Used in garage doors, agricultural equipment, and general hardware.
- Reverse Hooks:
An innovative hook design for applications with offset-load requirements. - Overview: Similar to machine hooks but designed to face the opposite direction.
- Advantages: Perfect for applications with offset-load requirements.
- Applications: Utilized in specialty machinery and custom assemblies.
- English Hooks:
An effective solution for heavy-duty applications that require reinforced connections. - Overview: Standard hooks pushed over the center, available with a double-loop variation.
- Advantages: Secure and durable under tension.
- Applications: Ideal for heavy-duty applications such as industrial equipment.
- Swivel Hooks:
A dynamic design allowing for flexibility and reduced wear in high-movement systems. - Overview: Separate hooks captured inside the spring, allowing for rotation.
- Advantages: Reduces wear and increases flexibility during use.
- Applications: Found in high-movement systems, such as robotics.
- Side Hooks:
A cost-effective choice for lightweight mechanisms where space constraints are critical. - Overview: Hooks that extend from the side of the spring, either angled or vertical.
- Advantages: Economical and flexible in design.
- Applications: Common in lightweight mechanisms where space is constrained.
- Safety Spring/Draw Bar Ends:
A fail-safe design to ensure connection even under critical conditions. - Overview: Keeps assemblies connected even in case of spring failure.
- Advantages: Provides additional security for critical systems.
- Applications: Used in safety-critical devices, such as elevators and cranes.
- Extended Hooks:
Designed for applications requiring additional reach without sacrificing strength. - Overview: Longer versions of machine or English hooks for extended reach.
- Advantages: Provides adaptability for applications with unique attachment points.
- Applications: Found in construction and manufacturing equipment.
- Custom-Shaped Ends:
Tailored to unique project requirements for proprietary designs. - Overview: Includes square, V-shaped, and other unique configurations.
- Advantages: Tailored to specific design needs for custom applications.
- Applications: Common in proprietary industrial tools and machinery.
- Plain Ends:
The simplest option for connecting an extension spring to other components. - Overview: Typically paired with plugs or screws to serve as custom attachments.
- Advantages: Versatile and economical for custom configurations.
- Applications: Common in tools, automotive parts, and custom machinery.
- Reduced Hooks:
Ideal for compact and space-saving designs while maintaining functionality. - Overview: Hooks with a smaller diameter than the spring body.
- Advantages: Perfect for compact applications requiring a smaller profile.
- Applications: Used in electronics and precision devices.
ISO Certified
As an ISO 9001:2015 certified compression extension manufacturer, Stalder Spring is committed to delivering the highest standards of quality and reliability. Our certification ensures that every order of custom extension springs is produced with precision, consistency, and care. Beyond meeting technical requirements, we prioritize competitive pricing, dependable lead times, and superior customer service