東海バネ工業 List of Products and Services

As a prototype for the development of rehabilitation robots, we would like to introduce a case where we received a consultation regarding a mechanism using springs. Due to the strict requirements for the desired spring characteristics and installation space limitations, we proposed specifications using high-tensile materials that are not commonly used by our company. As a result of testing the prototype, we were able to provide a product that achieved the compactness and lightweight as initially requested, along with high durability. 【Client Data】 ■ Robot Manufacturer ■ Spring Used: Torsion coil spring ■ Duration: 3 months ■ Torsion coil spring used in posture control devices *For more details, please download the PDF or feel free to contact us.

• Spring

Here is an example of a request for the design of a thin plate spring to be installed in a large press machine. The shape and dimensions of the mounting part on the counterpart side were already determined, and it was necessary to decide on dimensions that could be mounted on that counterpart while also meeting the required load characteristics. A spring for fatigue testing was manufactured based on the dimensions determined from the load data of the prototype. The results met the client's required characteristics, and regarding lifespan, it cleared 150,000 cycles in the fatigue test. The sliding parts also showed effective lubrication, confirming the wear prevention effect. 【Client Data】 ■ Press machine manufacturer ■ Spring used: Plate spring ■ Duration: 3 months ■ Plate spring adopted for large press machine *For more details, please download the PDF or feel free to contact us.

• Spring

We would like to introduce a case in which a steel manufacturer requested the use of springs in a new device to be installed on equipment that holds flat steel materials. After manufacturing the springs and conducting load tests, we found that the load was stronger than the calculated value and exceeded the required specifications. The cause was that both ends were fixed with bolts, which resulted in an increased load. Using three springs in parallel was too strong, so we reduced the number of parallel springs and conducted the test again. As a result, by reducing the number of layers, both the load and stroke successfully met the required specifications. 【Client Data】 ■ Steel Manufacturer ■ Spring Used: Leaf Spring ■ Duration: 2 Months ■ Bow-shaped leaf spring adopted by the steel manufacturer *For more details, please download the PDF or feel free to contact us.

• Spring

We would like to introduce a case of heat-resistant disc springs adopted in research and development semiconductor-related equipment. The customer was looking for springs that could generate high loads in a small space under conditions exceeding 350°C for a prototype project related to semiconductor manufacturing equipment. Based on the load characteristics required by the customer and the conditions of the space where the springs could be installed, we considered the size and shape and proposed specifications. The disc springs designed by us were incorporated into the customer's prototype equipment and are being used without any issues. 【Client Data】 ■ Semiconductor-related manufacturer ■ Spring used: Disc spring ■ Duration: 2 months ■ Heat-resistant disc springs adopted in research and development semiconductor-related equipment *For more details, please download the PDF or feel free to contact us.

• Spring

We would like to introduce a case in which we received an inquiry about disc springs from the RIKEN Institute. There was a challenge to reduce the distance between magnetic blocks that generate strong suction, in order to enhance the magnetic force applied to the electron beam and further improve laser output. To achieve this, a disc spring with extremely high precision load characteristics was necessary. As a result, we were able to reduce the variation in the spring constants of all 10 sets of disc springs to within ±1% while meeting reproducibility standards. 【Client Data】 ■ Research Institution ■ Spring Used: Disc Spring ■ Duration: 2 months ■ Ultra-high precision disc springs adopted in the laser light generation device "Undulator" *For more details, please download the PDF or feel free to contact us.

• Spring

We would like to introduce a case of disc springs adopted in a vibration control system called a brake damper. The client is currently conceptualizing a mechanism using springs as a prototype for the development of a vibration control system. There was a need for springs that could withstand extremely large loads while maintaining high precision in load characteristics. Therefore, we considered achieving the ideal load-deflection characteristics by precisely controlling the pressurized and depressurized loads based on the central values of these loads. Utilizing the back data on damping rates cultivated from disc springs for machine tool spindles and the design know-how derived from it, we designed an ideal disc spring that meets the required high-precision characteristics for pressurized and depressurized loads. 【Client Data】 ■ Seismic isolation and vibration control manufacturer ■ Spring used: Disc spring ■ Duration: 3 months *For more details, please download the PDF or feel free to contact us.

• Spring

We would like to introduce a case where our unique technology of coil springs solved the issue of lateral load. When a load is applied to a coil spring, a twisting motion occurs around the axis, resulting in lateral loads. This significantly affects the operation of safety valves and has been a concern for our customers. We developed a special testing machine that can measure "lateral load" specifically for safety valve coil springs. This allows us to quantify and visualize the forces acting on the springs that were previously invisible, enabling us to provide springs that minimize "lateral load" to the utmost limit. 【Client Data】 ■ Safety valves for power plants ■ Spring used: Coil spring ■ Duration: Approximately 2 months (excluding testing machine development period) ■ The issue of lateral load is solved by our unique technology of coil springs. *For more details, please download the PDF or feel free to contact us.

• Spring

We would like to introduce a case where we received a request to compact the conventional machine tool spindle while maintaining the clamping load. The newly developed i-MC COMPACT by our company can be designed to be up to 50% more compact while keeping the current clamping load unchanged. It is a dedicated disc spring for machine tool spindles that can be realized exactly as requested. This has enabled greater contributions to the overall compactness of machining centers and improved rotational balance. Additionally, high-stress design has become possible, achieving a maximum load increase of 190% within the same space as conventional products. 【Client Data】 ■ Machine Tool Manufacturer ■ Spring Used: Disc Spring ■ Duration: 2 Months ■ Ultra-High-Performance Disc Spring for Machine Tool Spindles "i-MC COMPACT" *For more details, please download the PDF or feel free to contact us.

• Spring

We would like to introduce a case where we received a design request for a disc spring to be used in far-infrared detectors mounted on artificial satellites and scientific observation balloons. The disc spring was intended to be used to apply pressure to an element made of a certain material, with a requirement to have an outer diameter of less than 3mm (an extremely small size for a spring). Although manufacturing to such a small size was extremely challenging, the spring was completed and delivered according to the proposed specifications. The disc spring is now attached to the far-infrared detector and is currently active in space. 【Client Data】 ■ Research Institution ■ Spring Used: Disc Spring ■ Duration: 3 months ■ Extremely small disc spring adopted for the far-infrared detector *For more details, please download the PDF or feel free to contact us.

• Spring

We would like to introduce a case where we were consulted about the possibility of creating a lightweight spring that suppresses vibrations for aerospace products. Lightweight design was a fundamental requirement, but there were limitations to achieving weight reduction using spring steel. Therefore, we designed using titanium alloy (Ti-6Al-4V), which has higher strength compared to spring steel. To ensure the necessary spring force, we adopted a nested spring design, and even so, we were able to achieve approximately 40% weight reduction compared to a design using spring steel. 【Client Data】 ■ Aerospace-related manufacturer ■ Type of spring used: Coil spring ■ Duration: 2 months ■ Titanium coil spring adopted for vibration suppression applications *For more details, please download the PDF or feel free to contact us.

• Spring

We would like to introduce the benefits of using our springs and services for water gates and bridges. Our company uses high-quality springs that have extremely low wear, allowing them to maintain highly reproducible characteristics even after long periods of repeated operation. They can be used in various environments, including salt damage, cold regions, and high humidity. Additionally, since the manufacturing data and drawings of the products are stored permanently, we can manufacture custom products in a short lead time. 【Benefits】 ■ Use of high-quality springs with extremely low wear ■ Maintenance of highly reproducible characteristics even after long periods of repeated operation ■ Availability of materials that combine strength and corrosion resistance, such as various stainless steels and special steels ■ Proposal of springs that can be used in harsh environments where corrosion is a concern ■ Permanent storage of product manufacturing data and drawings *For more details, please refer to the PDF materials or feel free to contact us.

• Spring

Introducing the benefits of adopting our springs and services in the aerospace industry. We are capable of conducting various reliability tests according to our customers' requests. By providing not only design proposals but also verification data, we contribute to enhancing the reliability of our customers' product quality. Additionally, we actively accept prototype requests, and if there are no issues during verification, we can transition to full production using the same manufacturing process. 【Benefits】 ■ Ability to conduct various reliability tests according to requests ■ Provision of verification data along with design proposals for new designs ■ Contribution to enhancing the reliability of customers' product quality ■ Support for high-difficulty designs and complex quality management ■ Active acceptance of prototype requests, with the possibility of transitioning to full production using the same manufacturing process if there are no issues during verification *For more details, please refer to the PDF materials or feel free to contact us.

• Spring

We would like to introduce the benefits of adopting our springs in the machinery industry. At our company, we can combine disc springs to achieve the desired characteristics according to your requirements, allowing us to propose a design specifically tailored to your model. This enables a flexible spindle design that cannot be achieved with standard disc springs. Additionally, we have developed and own a durability fatigue testing machine that simulates the actual spindle operation, allowing for verification testing through prototypes before mass production. 【Benefits】 ■ Established a unique standard called "i-MC" for disc springs suitable for machining center spindles ■ Combine disc springs to achieve desired characteristics according to your requirements ■ Flexible spindle design that cannot be achieved with standard disc springs ■ Verification testing through prototypes can be conducted before mass production ■ Contribute to the development of your high-end models *For more details, please refer to the PDF materials or feel free to contact us.

• Spring
• Other machine tools

We would like to introduce the benefits of using our springs in the machinery and equipment industry. At our company, we can set manufacturing tolerances according to your usage requirements when producing springs. By balancing strict management with adjustable control values, we can meet the necessary functions while offering proposals at appropriate costs. Additionally, since you can conduct verification using prototypes, you can confidently transition to mass production. **Benefits** - Manufacturing tolerances can be set according to usage requirements - We provide added value to your products - We actively accept prototype requests, and if there are no issues during prototype verification, we can transition to full production using the same manufacturing process - The manufacturing data and drawings of the produced products are stored permanently at our company *For more details, please refer to the PDF document or feel free to contact us.*

• Spring

We would like to introduce the benefits of adopting our springs and services in the oil, gas, and energy industry. Our company possesses unique manufacturing technologies specialized for the industry and products, based on many years of delivery experience to customers in the same field. We can provide proposals tailored to your usage environment and applications. Additionally, based on our past manufacturing achievements, we always have a variety of special steel spring materials in stock, regardless of recent orders. [Benefits] ■ Unique manufacturing technology specialized for oil, gas, and energy ■ Unique design standards and manufacturing techniques for springs in high-temperature environments ■ A variety of special steel spring materials always in stock based on past manufacturing achievements ■ In emergencies, we can deliver products urgently *For more details, please refer to the PDF document or feel free to contact us.

• Spring
• Other energy equipment

Tōkai Spring Industry Co., Ltd. is a specialized manufacturer of springs that responds to customer requests with optimal design and quality through complete order fulfillment. Our "spring products" range from various machine parts to important components for factory equipment, steelmaking, power generation, and space technology. We customize the shape, size, and material of springs to meet customer requirements. We manufacture made-to-order springs starting from just one piece to perfectly fit your needs. **Features of Tōkai Spring Industry:** - Providing comprehensive support services with know-how cultivated since our founding in 1934! - High-quality springs made to order by craftsmen with national qualifications. - Quick and accurate spring proposals through our design support system. - Rapid presentation of optimal prices through our quotation management system. - Thorough manufacturing history management system that includes single-item management of material steel. - Actively acquiring certifications such as ISO and JIS to guarantee quality. *For more details, please refer to our catalog or feel free to contact us.*

• Spring
• Contract manufacturing
• Processing Contract

"Bamboo Spring" is a spring shaped like a bamboo shoot, formed by winding a rectangular cross-section plate into a conical shape. It can support a large load relative to its occupied volume and absorb energy, making it suitable for shock absorption devices. The thickness of the plates varies from less than 1mm to about 32mm for thicker ones, and the load capacity can reach up to 500kN for larger sizes. 【Features】 - Manufacturing technology for large bamboo springs is still being passed down - Thorough data management - Capable of providing the same bamboo springs as in the past at any time - Completely made-to-order production & diverse small-batch production - Adaptable to various environments such as heat resistance, corrosion resistance, and durability *For more details, please refer to the related links or feel free to contact us.

• Spring
• Contract manufacturing
• Processing Contract

The "spiral spring" is made by winding a strip of material so that its centerline forms a spiral shape on a plane, and it acts as a spring when an external force is applied to one end of the spring. Because it can store a large amount of energy in a relatively small space, it is used as a power source for everyday items like clocks as well as for moving large structures. The shapes can be either in contact with the material or non-contact, and they are selected according to load characteristics and applications. 【Features】 ■ Stores a large amount of energy and exerts force in the rotational direction in a compact space ■ Capable of designing and manufacturing functional spiral springs ranging from small to large sizes ■ Made to order and capable of producing a wide variety of ultra-small quantities ■ Adaptable to various environments such as heat resistance, corrosion resistance, and durability *For more details, please refer to the related links or feel free to contact us.

• Spring
• Contract manufacturing
• Processing Contract

When you hear "ring spring," you might not immediately grasp its shape. Although "ring springs" are a minor presence among spring types, they are springs made by alternately stacking inner and outer rings with conical surfaces, allowing them to absorb a large amount of energy due to the frictional force acting on the conical surfaces. They are also used for damping applications that utilize this hysteresis caused by friction. 【Features】 ■ Absorbs a large amount of energy in a small volume ■ Capable of handling operating loads exceeding 100 tons ■ Has a long-standing track record and know-how in "ring springs" ■ Made to order with a wide variety of ultra-small production ■ Compatible with various environments such as heat resistance, corrosion resistance, and durability *For more details, please refer to the related links or feel free to contact us.

• Spring
• Contract manufacturing
• Processing Contract

The "torsion spring" is primarily used as a coil spring that receives torsional moments. The terminal parts (arms) come in various shapes, and their shapes can be adjusted according to their usage, installation methods, and installation locations. Additionally, there is a type called double torsion, which has a shape where the coil parts are connected, allowing for double the torque at the same torsional angle. 【Features】 ■ Can be manufactured with a maximum wire diameter of 40mm, thus accommodating high torque ■ By selecting materials according to the specifications and environment, it is possible to produce a wide variety of custom-made torsion springs, from standard spring steel to special steel ■ Completely made-to-order production & small-lot production of various types ■ Compatible with various environments such as heat resistance, corrosion resistance, and durability *For more details, please refer to the related links or feel free to contact us.

• Spring
• Contract manufacturing
• Processing Contract

"Tension coil springs (tension springs)" are generally used in applications that bear loads in the pulling direction, so many of them have hook-shaped ends, but their shapes are diverse. As a feature, thin-diameter springs that do not undergo heat treatment after winding can have initial tension applied, allowing them to generate an appropriate load without any gap between the coils when tension is applied. 【Features】 ■ Can be manufactured up to a maximum wire diameter of 30mm, thus accommodating high loads ■ Compatible with fittings ■ Made to order and capable of producing a wide variety of ultra-small quantities ■ Suitable for various environments such as heat resistance, corrosion resistance, and durability *For more details, please refer to the related links or feel free to contact us.

• Spring
• Contract manufacturing
• Processing Contract

"Leaf springs (thin leaf springs)" are also known as plate springs, and anything with a plate shape is fundamentally classified as a leaf spring. As a result, there are various types of shapes, and in design, it is necessary to conduct unique stress evaluations for each item. Their applications are wide-ranging, including gaskets in high-temperature environments and complex structures such as wristwatches. Our company is capable of handling not only thin plates but also materials exceeding 30mm in thickness. [Features] ■ Ability to create detailed drawings and materialize complex shapes from abstract illustrations ■ Providing leaf springs that satisfy the desired shape and load characteristics ■ For complex shapes where durability evaluation is difficult, high-precision durability assessments are made possible using FEM analysis ■ Completely made-to-order production and a wide variety of ultra-small quantity production ■ Adaptable to various environments such as heat resistance, corrosion resistance, and durability *For more details, please refer to the related links or feel free to contact us.

• Spring
• Contract manufacturing
• Processing Contract

The "i-MC SPRING Series" is a product developed as a disc spring for machining center spindles, ensuring dimensional accuracy and concentricity suitable for high-speed rotation of over 10,000 min^-1, demonstrating excellent performance. We offer a lineup of products that can meet various customer demands. Furthermore, to respond to our customers' high-level requirements, we conduct durability evaluations under various conditions using a durability testing machine designed to simulate actual operating conditions. 【Features】 ■ Made to order and capable of producing a wide variety of ultra-small quantities ■ Compatible with various environments such as heat resistance, corrosion resistance, and durability <i-MC SPRING Series> ■ Ensures dimensional accuracy and concentricity suitable for high-speed rotation of over 10,000 min^-1 ■ We are committed to material selection, providing highly durable products ■ A lineup of products that can meet various customer demands *For more details, please refer to the related links or feel free to contact us.

• Spring
• Contract manufacturing
• Processing Contract

The "disc spring" is a type of spring formed into a conical shape with a ring that has a hole in the center of the disc. It can withstand large loads and impacts with small deflections, and its characteristics can be altered by using it individually or in combination with others. It is also known to be a difficult spring to design, as it can exhibit phenomena where the relationship between deflection and load reverses, and slight dimensional deviations can significantly affect load characteristics. Our company offers suitable proposals based on our unique design and manufacturing know-how. 【Features】 ■ Space-saving design is our specialty ■ Fully custom-made ■ Suitable proposals based on our unique design and manufacturing know-how ■ Complete made-to-order production & a wide variety of ultra-small quantity production ■ Compatible with various environments such as heat resistance, corrosion resistance, and durability *For more details, please refer to the related links or feel free to contact us.

• Spring
• Contract manufacturing
• Processing Contract

Typically, when we talk about coil springs, we often refer to cylindrical shapes, but "conical springs," as the name suggests, have a conical shape. One of their features is that their shape can reduce body bending, and depending on the design, it can also lower the contact height. As the compression increases, the load becomes stronger, which allows for the utilization of its nonlinear characteristics. 【Features】 ■ Great for compact designs, effectively utilizing space ■ If you specify the usage conditions (size, load characteristics), we can accommodate from the design stage ■ Consideration for heat-resistant and corrosion-resistant specifications is also possible ■ Made to order with complete production and a wide variety of ultra-small batch production ■ Compatible with various environments such as heat resistance, corrosion resistance, and durability *For more details, please refer to the related links or feel free to contact us.

• Spring
• Contract manufacturing
• Processing Contract

"Leaf springs" are springs that have a rectangular or square cross-section, and compared to round cross-section springs, they can absorb a greater amount of energy if they are of the same size. Additionally, the material before coiling is shaped into a trapezoid, and after coiling, it is designed to have a clean rectangular or square cross-section. 【Features】 ■ Supports high-precision molding ■ Capable of handling large loads in a compact size ■ Design and manufacturing support for small lots of 1 or 2 pieces ■ Completely made-to-order production & diverse small-batch production ■ Compatible with various environments such as heat resistance, corrosion resistance, and durability *For more details, please refer to the related links or feel free to contact us.

• Spring
• Contract manufacturing
• Processing Contract

"Coil springs" are commonly used and have a simple shape, allowing for low-cost manufacturing compared to other types of springs. Larger sizes are formed by heating the material to over 800°C, which is why they are also called hot-formed coil springs. They can support a maximum load of several tens of tons. Conversely, smaller ones are formed at room temperature, which is why they are referred to as cold-formed coil springs. We can manufacture materials with a diameter of 90mm, a coil outer diameter of 600mm, and a free length of up to 1,200mm. [Features of our large spring forming machine] - It incorporates the experience and know-how accumulated over many years by craftsmen. - Simultaneous control of six axes is possible. - It can achieve high-precision spring characteristics. - We can accommodate even a single spring. *For more details, please refer to the related links or feel free to contact us.

• Spring
• Contract manufacturing
• Processing Contract

The "Gate Rob" is an overload detection and rope slack detection device that constantly monitors the tension on the wire rope using a spring. When the tension applied to the wire rope exceeds the allowable limit or when the tension is released and slack occurs, the limit switch activates and instructs an emergency stop. It uses high-quality springs that have extremely low wear, allowing it to maintain highly reproducible characteristics even after long periods of repeated operation. 【Features】 ■ Overload detection (Saraban) ■ Rope slack detection (Coil spring) ■ Reliable long-term use (Saraban and coil spring) ■ Usable in various environments ■ Over 6,000 units adopted (from 1989 to 2019) *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

This document is a technical guidance on Sarabane, featuring usage examples and characteristics. Sarabane has the advantage of being able to bear large loads in relatively small spaces with minimal deflection. Additionally, we introduce various aspects including shapes, load and stress calculation formulas, dimensional considerations, and h/t and load characteristics. [Contents] ■ Usage examples of Sarabane ■ Characteristics of Sarabane ■ Shapes of Sarabane ■ Load and stress calculation formulas for Sarabane ■ Dimensional considerations for Sarabane *For more details, please refer to the PDF document or feel free to contact us.

• Machining Center

The "i-MC COMPACT" is a balancer for machining center spindles that can be used over 6 million times. It is capable of supporting ultra-high-speed rotation and has achieved approximately 65% less unbalance compared to conventional balancers. This product has already been adopted by over 70 models of machining centers. 【Features】 ■ Usable over 6 million times ■ Compact design ■ Improved balance performance ■ Proven adoption in 70 models *For more details, please refer to the PDF document or feel free to contact us.

• Machining Center

Tokai Spring Industry Co., Ltd. is a company that responds to complete orders for metal springs, handling design and production. By fully systematizing everything from spring design to ordering and delivery, we have established a framework that allows us to respond quickly and accurately to all requests. We offer a wide variety of springs that excel in various fields, including "coil springs" that can be manufactured with a material diameter of 90mm, a coil outer diameter of 600mm, and a free length of 1,200mm, as well as "disc springs" that are adept at space-saving designs. 【Main Products】 ■ Hot coil springs ■ Cold coil springs ■ Disc springs ■ Leaf springs *For more details, please refer to our catalog or feel free to contact us.

• Spring
• Contract manufacturing
• Processing Contract