Double Acting Spring Hinges: The Perfect Blend of Functionality and Durability by Zhejiang Cross Hardware

Zhejiang Cross Hardware Co., Ltd. has developed an innovative solution for door installations with their double acting spring hinges. These hinges are engineered to enable doors to swing smoothly in both directions and automatically return to their closed position, ensuring enhanced functionality and heightened security. This unique feature makes them ideal for environments where easy and efficient access is crucial, such as in kitchens, hospitals, and commercial spaces. In the following sections, we'll explore the comprehensive features, specifications, and provide a detailed installation guide for these hinges.

Product Features and Specifications

· Material and Construction: The double acting spring hinges are crafted from high-quality steel, chosen for its strength and durability. This material ensures that the hinges can withstand the rigors of frequent use, making them a reliable choice for heavy traffic areas. Steel's robust nature also offers resistance against wear and tear and maintains structural integrity over time, making these hinges a long-term investment for both residential and commercial properties.

· Design Specifications: One of the standout features of these hinges is their non-template and non-handed design, which simplifies the installation process. This design means that the hinges can be installed on any standard door without the need for specific hand orientation, making them a versatile option for various door setups. Each hinge measures 6 inches by 4.5 inches, providing ample size to support and stabilize doors effectively.

Model Specifications

The double acting spring hinges come in various models to accommodate different door sizes and weights. The specifications are as follows:

· SP445534: Open size 4.5" x 4.5" with a thickness of 3.4mm, available in both steel and stainless steel. It uses MS 1/2" x 12 - 24 screws and WS 1-1/4" x 12 screws.

· SP445034: Open size 4.5" x 4.0" with a thickness of 3.4mm, also available in steel and stainless steel. It uses MS 1/2" x 12 - 24 screws and WS 1-1/4" x 12 screws.

· SP440033: Open size 4.0" x 3.3" with a thickness of 3.4mm, available in steel and stainless steel. It uses MS #12 x 1" screws.

· SP440027: Open size 4.0" x 2.7" with a thickness of 2.7mm, available in steel and stainless steel. It uses MS 1/2" x 10 - 24 screws and WS #10 x 1" screws.

· SP440025: Open size 4.0" x 2.5" with a thickness of 2.5mm, available in steel and stainless steel. It uses MS 1/2" x 9 - 24 screws and WS #9 x 1" screws.

· SP430027: Open size 3.0" x 2.7" with a thickness of 2.7mm, available in steel and stainless steel. It uses MS 1/2" x 10 - 24 screws and WS #9 x 1" screws.

· SP353527: Open size 3.5" x 3.5" with a thickness of 2.7mm, available in steel and stainless steel. It uses MS 1/2" x 10 - 24 screws and WS #10 x 3/4" screws.

· SP353525: Open size 3.5" x 3.5" with a thickness of 2.5mm, available in steel and stainless steel. It uses MS 1/2" x 9 - 24 screws and WS #9 x 1" screws.

All hinges are steel-polished and plated or bonderized and prime coated for painting. They follow ANSI templates and are available in both square and 1/4" & 5/8" radius round corners.

Recommended Door Weights

For optimal performance, the recommended maximum door weights and the corresponding number of hinges are provided:

· 3-1/2" x 3-1/2": Supports up to 40 lbs with 1 spring hinge or 2 butt hinges, and up to 70 lbs with 2 spring hinges or 1 butt hinge.

· 4" x 4": Supports up to 85 lbs with 2 spring hinges or 1 butt hinge, and up to 110 lbs with 3 spring hinges.

· 4-1/2" x 4" and 4-1/2" x 4-1/2": Supports up to 100 lbs with 2 spring hinges or 1 butt hinge, and up to 150 lbs with 3 spring hinges.

Hinge Details

· Door and Jamb Flange Configuration:

· Door Flange: The door flange can be either mortised into the door or surface applied. Mortising involves creating a recess in the edge of the door to fit the hinge flush with the surface, which enhances the aesthetic appeal and increases the security by making the hinge less prone to tampering.

· Jamb Flange: Similarly, the jamb flange is designed for surface application directly onto the door jamb. This method simplifies the installation process and allows for easier adjustments and maintenance over time without compromising the structural integrity of the door frame.

Screws and Accessories

· Wood Screws: #12 x 1-1/4" wood screws are provided to secure the hinges into wooden doors and frames firmly. The length and gauge of these screws are chosen to ensure a tight fit, reducing the likelihood of the screws loosening over time due to the door's repetitive motion.

· Machine Screws: For added security and durability, #12 x 1/2" 12-24NC machine screws are also included. These screws are typically used in metal or other tough materials where stronger thread engagement is necessary, providing a secure installation in various door materials.

· Installation Kit: The inclusion of all necessary screws and accessories in the kit ensures that users have everything required for a secure and straightforward installation. This comprehensive kit not only facilitates quick setup but also enhances the overall stability and functionality of the door hinges.

Detailed Installation Guide for Double Acting Spring Hinges

Initial Preparation

Before commencing the installation of the double acting spring hinges, it's important to prepare the hinge mechanism to prevent any tension-related issues during setup:

1. Relieving Spring Tension:

· Locate the Tension Adjustment Hole: Find the small hole on the hinge's barrel where the tension rod will be inserted.

· Insert the Tension Rod: Slide the rod into the hole. It should fit snugly.

· Rotate to Release Tension: Turn the rod in the direction indicated by the arrows stamped on the hinge. This rotation compresses the spring inside, relieving tension.

· Remove the Tension Pin: Once the spring is fully compressed, carefully remove the pin that locks the tension in place. This will allow you to adjust the hinge without resistance during installation.

Mounting the Hinges

Proper alignment and placement of the hinges are critical for optimal door function:

1. Aligning the Hinges:

· Door and Jamb Placement: Position the hinge so that one flange lies flush against the door's edge and the other against the door jamb.

· Mark Screw Holes: Use a pencil to mark where screws will be placed to ensure the hinge remains aligned during the drilling.

2. Installation on Double Doors:

· Orientation for Tension Adjustment: On double doors, install the hinges such that the tension adjustment faces upwards on one door and downwards on the opposite. This helps in balancing the door swing and improves alignment across both doors.

Spring Tension Adjustment

Adjusting the spring tension is a delicate process that requires attention to detail to ensure the door functions smoothly:

1. Inserting the Tension Rod:

· Adjust for Plumb: Place the door in the closed position and insert the tension rod into the adjustment hole. Rotate the rod in the appropriate direction to increase or decrease tension.

· Check Alignment: Use a level to check that the door is perfectly vertical (plumb).

2. Securing the Tension:

· Re-insert the Tension Pin: Once the desired tension is achieved, replace the pin to lock the tension settings in place.

· Follow Arrow Indications: Ensure adjustments are made according to the arrows on the hinge barrel to increase or decrease tension correctly.

Final Steps

Ensuring the door operates correctly after installation involves several key checks and adjustments:

1. Shim Placement:

· Frame Alignment: If there are gaps or misalignments, use shims under the hinge flanges where they attach to the door and jamb to achieve a level installation.

2. Operational Check:

· Swing and Return Test: Open and close the door several times to check that it swings freely and returns to the closed position naturally. Adjust tension if the door feels too loose or too tight.

Warnings and Additional Notes

· Avoid Beveled Edge Doors: These hinges are not designed for doors with beveled edges as they can interfere with the hinge operation.

· Directional Arrows: Always observe the directional arrows on the hinge barrel for tension adjustments. This ensures the spring is adjusted in the correct direction, preventing damage and ensuring longevity of the mechanism.

By following these detailed steps, you can ensure a secure and functional installation of the double acting spring hinges, enhancing door functionality and safety in your space.

Advantages of Double Acting Spring Hinges

Double acting spring hinges offer a range of advantages that make them a popular choice for various door installation needs, especially in commercial and residential settings where door traffic is frequent. Here are some of the key benefits:

Bidirectional Movement: One of the primary advantages of double acting spring hinges is their ability to allow doors to swing in both directions, opening both inward and outward. This feature is particularly useful in high-traffic areas such as kitchens in restaurants, hospitals, and retail spaces, enabling smooth and efficient movement for people passing through.

Self-Closing Function: These hinges are designed with an internal spring mechanism that automatically closes the door after it has been opened. This self-closing feature ensures that doors are never left open, which can be crucial for maintaining room temperatures, ensuring privacy, and enhancing security.

Adjustable Tension: The tension of the spring in double acting spring hinges can be adjusted, which allows the closing force to be customized according to the specific door’s weight and the desired speed of closure. This flexibility makes them suitable for a wide range of door sizes and types.

Durability and Longevity: Constructed from robust materials like steel, double acting spring hinges are built to withstand the wear and tear of frequent use. They are designed to perform well over long periods, providing a reliable solution that requires minimal maintenance.

Enhanced Accessibility: For environments that must comply with accessibility standards, such as public buildings and facilities that accommodate individuals with disabilities, double acting spring hinges facilitate easier access. The ease of door movement in both directions can significantly aid mobility for individuals using wheelchairs or other mobility aids.

Space Efficiency: These hinges are particularly advantageous in areas where space is limited. By enabling the door to swing fully in both directions, the space needed for door swing radius is reduced, which can be beneficial in narrow corridors and small rooms.

Easy to Install and Adjust: Despite their complex functionality, double acting spring hinges are relatively easy to install and adjust, making them a practical choice for many DIY enthusiasts and professionals alike. The ability to adjust tension without removing the door or disassembling the hinge adds to the convenience.

Aesthetic Versatility: Available in various finishes and designs, these hinges can be seamlessly integrated into most decor styles without compromising the aesthetic appeal of a space. They can be discreet or decorative, depending on the chosen style, blending functionality with design.

Safety Features: The automatic closing function of double acting spring hinges helps prevent accidents by ensuring doors close behind users, reducing the likelihood of fingers getting caught or unexpected openings that could lead to collisions.

Energy Efficiency: By ensuring doors close immediately after opening, these hinges help maintain the energy efficiency of a space, particularly in terms of heating and air conditioning, by minimizing unwanted air exchange.

Applications of Double Acting Spring Hinges

Double acting spring hinges are highly versatile and find application in various settings due to their unique bidirectional swinging capability and self-closing feature. Here are some common applications of these hinges:

Restaurants and Bars:  In the hospitality sector, particularly in restaurants and bars, kitchen doors often use double acting spring hinges to allow staff to push through in either direction while carrying trays or other items, keeping their hands free and facilitating efficient movement between the kitchen and dining area.

Hospitals and Healthcare Facilities: In medical facilities, doors equipped with these hinges provide easy access while maintaining necessary privacy and hygiene. They allow healthcare workers to move quickly and effortlessly through different areas, which is critical in emergency situations.

Retail Stores: Retail environments benefit from the use of double acting spring hinges on stock room doors or entrance to areas frequently accessed by staff. This setup enhances operational efficiency by allowing easy access while keeping the doors generally closed to maintain aesthetics and security.

Salons and Spas: In salons and spas, these hinges are used for restroom and treatment room doors to ensure doors close automatically for privacy and noise reduction, contributing to a tranquil, private client experience.

Offices: In office buildings, double acting spring hinges can be used for doors in common areas such as copy rooms or mailrooms, where hands-free operation is beneficial, or where door traffic is high.

Residential Use: At home, these hinges might be used in laundry rooms or pantry doors where easy access in both directions can make carrying items more manageable. They are also useful in family homes to prevent doors from being left open accidentally.

Educational Institutions: Schools and colleges use double acting spring hinges for classroom doors or doors to common areas to facilitate easy and quick movement of students and faculty while maintaining an orderly environment.

Industrial Facilities: In factories and warehouses, these hinges support the heavy-duty use of doors that see a lot of back-and-forth traffic, such as at entrances to storage areas, helping to prevent wear and tear on the door frame and ensuring the door remains closed when not in use.

Public Buildings and Government Facilities: Doors in public buildings like libraries, city halls, or community centers often employ double acting spring hinges to enhance accessibility and comply with public safety and accessibility standards.

Garages and Utility Rooms: For garage side doors or utility rooms where hands might be full, these hinges add convenience by allowing the door to be nudged open from either direction.

Maintenance of Double Acting Spring Hinges

Regular Lubrication: Periodically apply a light machine oil to the pivot points and spring mechanism to keep the hinges operating smoothly. Avoid using heavy grease as it can attract dust and debris, which may cause the hinge to malfunction over time. Regular lubrication ensures that the movement remains fluid and reduces the risk of wear and tear on the hinge components.

Tension Adjustment: Check the spring tension regularly to ensure the door closes properly. If the door starts to close too slowly or too quickly, adjust the tension using the tension rod. Follow the manufacturer's instructions for tension adjustment, ensuring the tension pin is securely reinserted after adjustments. Proper tension maintenance ensures the door returns to its closed position consistently and safely.

Screw Tightening: Inspect the screws securing the hinges to the door and jamb periodically. Tighten any loose screws to prevent misalignment or detachment of the hinge. Replace any stripped or damaged screws immediately to maintain the integrity of the hinge installation. Keeping the screws tight ensures that the hinge remains properly aligned and securely attached, preventing operational issues.

Cleaning: Keep the hinges clean by wiping them down with a damp cloth to remove dust and debris. Avoid using harsh chemicals that could damage the hinge finish or corrode the metal. For stainless steel hinges, use a stainless steel cleaner to maintain their appearance and prevent corrosion. Regular cleaning helps to preserve the hinge's aesthetic and functional qualities.

Inspect for Wear and Tear: Regularly check for signs of wear, such as rust, corrosion, or deformation. Replace any damaged hinges promptly to ensure the door operates safely and efficiently. Pay special attention to high-traffic areas where hinges are subjected to more frequent use and may wear out faster. Early detection and replacement of worn components prevent more significant issues and ensure continuous, safe operation.

Comparison of Double Acting Spring Hinges Vs other types of Hinges

Double Acting Spring Hinges vs. Swing Clear Hinges

· Double Acting Spring Hinges: These hinges allow doors to swing in both directions and automatically return to a closed position. They are ideal for high-traffic areas where hands-free passage is needed, such as kitchens or medical facilities. While they provide the convenience of movement in both directions, they do not swing the door completely clear of the opening.

· Swing Clear Hinges: Designed to swing the door completely clear of the opening when fully open, these hinges are essential for maximizing the clear width of the doorway, crucial for ADA compliance or when moving large objects. Unlike double acting spring hinges, they only allow movement in one direction but provide unobstructed access.

Double Acting Spring Hinges vs. Full Surface Hinges

· Double Acting Spring Hinges: Offer the functionality of opening in both directions with a self-closing feature, enhancing traffic flow and convenience. They require careful mounting to ensure proper operation and may be visible when the door is closed.

· Full Surface Hinges: Mounted on the surface of both the door and frame, these hinges are easier to install and adjust. They provide stability but are always visible and do not offer the bidirectional functionality or self-closing capability of double acting spring hinges.

Double Acting Spring Hinges vs. Full Mortise Hinges

· Double Acting Spring Hinges: These are not typically concealed, offering robust performance in both opening directions and self-closing. They are more functional in settings requiring efficient space usage and traffic management.

· Full Mortise Hinges: Installed within a mortise cutout, they provide a clean and concealed look, enhancing the door’s aesthetic appeal. However, they only allow the door to move in one direction and do not automatically close the door.

Double Acting Spring Hinges vs. Half Mortise Hinges

· Double Acting Spring Hinges: Allow doors to freely swing in both directions and return to a closed position automatically, suitable for environments with two-way traffic.

· Half Mortise Hinges: Combine the aesthetics of a concealed hinge with the ease of installation of a surface-mounted hinge. While they offer a partially concealed look, they do not facilitate movement in both directions nor provide a self-closing feature.

Double Acting Spring Hinges vs. Half Surface Hinges

· Double Acting Spring Hinges: Provide efficient operation by allowing the door to move in both directions and self-close, ideal for busy areas needing quick and easy door operation.

· Half Surface Hinges: Similar to half mortise hinges, one leaf is surface mounted which provides easier installation but they do not offer the two-way swing or automatic closing features of double acting spring hinges.

Double Acting Spring Hinges vs. Butt Hinges

· Double Acting Spring Hinges: Facilitate door movement in both directions and include a self-closing mechanism, enhancing usability in multi-directional traffic settings.

· Butt Hinges: Common in residential applications, they are smaller and typically allow door movement in one direction. They are easy to install but lack the functional capabilities of double acting hinges, such as bidirectional movement and self-closing.

Double Acting Spring Hinges vs. Continuous Hinges

· Double Acting Spring Hinges: Specialize in allowing doors to open in both directions and close automatically, optimized for frequent use and high-traffic areas.

· Continuous Hinges: Also known as piano hinges, these run the entire length of the door, distributing weight evenly and reducing stress. They are durable and provide smooth operation but do not inherently allow for bidirectional movement or self-closing like double acting spring hinges.

Each hinge type offers specific benefits suitable for different applications, making the choice dependent on the particular needs of the installation environment. Double acting spring hinges stand out in scenarios where bidirectional movement and automatic closing are prioritized.

Double acting spring hinges by Zhejiang Cross Hardware Co., Ltd. represent a significant advancement in door hinge technology, offering unparalleled convenience, durability, and versatility. Whether in high-traffic commercial spaces, residential homes, or specialized environments like healthcare facilities, these hinges provide a robust solution that enhances functionality and safety. By choosing Zhejiang Cross Hardware Co., Ltd.'s double acting spring hinges, you invest in a product designed for longevity and superior performance, backed by a commitment to quality and innovation.

For more information on our products and to place an order, visit the Zhejiang Cross Hardware Co., Ltd. website or contact our customer service team. We are here to help you find the perfect hinge solution for your needs.

Contact Information

For more information or to purchase, contact:

Zhejiang Cross Hardware Co., Ltd.

Address: No.515, Suizhong Road, Dushangangqu, Zhejiang (314204)

Phone: +86-573-89173989

Fax: +86-573-89173993

Email: Lewis@cross-hardwares.com