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Spring×鶴岡発條 - List of Manufacturers, Suppliers, Companies and Products

Spring Product List

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Compression spring SW-CΦ3.0 cost reduction cushion spring

Compression spring SW-CΦ3.0 cost reduction cushion spring

There are various methods for cost reduction, such as using hard steel wire and eliminating grinding processes.

The material used is "hard steel wire - SW-C." Compared to piano wire, hard steel wire has lower durability but is a cost-effective and easily processed material. If the application does not involve severe repetitive loads, using hard steel wire can lead to cost reductions. If you are concerned about the durability of hard steel wire, we can calculate the lifespan of the spring for you, so please feel free to consult us. Additionally, this spring reduces costs by omitting grinding processing at both ends. In spring literature, it is stated that "grinding processing is performed when the wire diameter is Φ0.5 or more." However, depending on the application, there may be cases where omitting grinding processing does not pose any issues. Omitting grinding processing can lead to significant cost reductions, so we recommend considering this option as well. The surface treatment is "glossy nickel plating." If you have any issues with springs, please feel free to consult us. Our technical staff will respond carefully. Turuoka Spring Co., Ltd. Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web meetings.

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Tension Spring SUS301 - Hercules Φ2.1 Garter Spring

Tension Spring SUS301 - Hercules Φ2.1 Garter Spring

The stainless steel wire "Hercules" for high-strength springs has strength comparable to piano wire.

The material used is "high-strength spring stainless steel wire - Hercules." The wire diameter is Φ2.1. "Hercules" is a spring stainless steel wire based on SUS301. It is characterized by its high strength compared to the general-purpose SUS spring material "SUS304-WPB." Its material strength and load characteristics are said to be comparable to piano wire, making it a valuable material when you encounter difficulties in designing with stainless steel wire. This spring has been designed and prototyped by our company. We proposed the use of "Hercules" as we could not meet durability requirements with "SUS304-WPB." If you are having trouble with springs, please feel free to consult us. Our technical staff will respond carefully. Tsurugaoka Spring Co., Ltd. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web conferences.

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Cone spring SUS304-WPB Φ0.8 taper spring

Cone spring SUS304-WPB Φ0.8 taper spring

The sensor controls the free height and suppresses load variation.

The material used is "spring stainless steel wire - SUS304WPB." To minimize load variation, coiling is performed while controlling the free height with a sensor. Only the large diameter side's seat winding is tightly wound, while the effective winding section is tapered in pitch, and both ends are not ground. Due to a large spring index (*) and a fluffy shape that is prone to deformation, care is taken during heat treatment to prevent entanglement between springs. *Spring index: The value obtained by dividing the average coil diameter by the wire diameter. It serves as a guideline for the difficulty of spring manufacturing, with JIS standards recommending a range of 4 to 22. If you have any issues with springs, please feel free to consult us. Our technical staff will respond carefully. Technical contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Tsuruga Spring Co., Ltd. for springs We also support web meetings.

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Twisted spring SUS304-WPBΦ2.5 hinge spring

Twisted spring SUS304-WPBΦ2.5 hinge spring

To suppress the variation in moment (torque), the free angle of the arm is managed with a tolerance of ±2.5 degrees.

The material used is "spring stainless steel wire - SUS304-WPB." The wire thickness is Φ2.5. To suppress variations in the initial moment (torque), the allowable tolerance for the arm's free angle is set to "±2.5 degrees." The allowable tolerance for the arm's free angle is "±10 degrees" even under JIS standards, so "±2.5 degrees" is a quite stringent setting. A dedicated inspection jig has been manufactured, and all units are inspected and adjusted to manage the angle. If you have any issues with springs, please feel free to consult us. Our technical staff will respond carefully. Technical contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Tsuruga Hatsujo Co., Ltd. for springs. We also support web meetings.

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Twisted spring SWP-AΦ3.5 return spring

Twisted spring SWP-AΦ3.5 return spring

Piano wire types "A" and "B" are widely used, but type "V" does not have good marketability.

The material is "Piano Wire Type A (SWP-A)," and the wire diameter is Φ3.5. Piano wire is the most commonly used material for iron-based spring materials, and there are three types: Type A, Type B, and Type V. Type A (SWP-A) and Type B (SWP-B) are used for high-end springs that require durability and precision. The difference between Type A and Type B is hardness. Type B is harder and has better resistance to deformation, but it has less elongation, making it unsuitable for forming processes like bending and drawing. For products like "twisted coil springs" with bending processes or "tension coil springs" with hook processing, it is common to use Type A due to its good formability. Type V (SWP-V) is a material specialized for valve springs, but it seems to be less commonly used because the material "SWOSC-V" for valve springs is more widely adopted. If you have any issues with springs, please feel free to consult us. Our technical staff will respond carefully. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Tsuruga Spring Co., Ltd. for springs We also support web meetings.

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Compression spring SWOSC-VΦ3.8 valve spring

Compression spring SWOSC-VΦ3.8 valve spring

Spring index = 2.0, it is a high difficulty machining.

The material used is "oil-tempered wire made of silicone chrome steel for spring applications, SWOSC-V." The material with a wire diameter of Φ3.8 is wound with an average coil diameter of Φ7.7mm. This is a processing task with a spring index of 2.0, which is quite challenging. The spring index is the value obtained by dividing the average coil diameter by the wire diameter, serving as a guideline for the difficulty of processing the spring. According to JIS standards, a spring index of "4 or more and 22 or less" is desirable. It is also referred to as spring index = D/d (Deviate). In the case of this spring, when the spring index is 4 or less, the coil diameter is small, making it tight and difficult to wind. Conversely, when the spring index exceeds 22, the coil diameter is large, resulting in a fluffy and unstable winding. That's the general idea. Our company processes springs with a spring index of less than 4 as well as those exceeding 22. Of course, there are limits. The limit values for the spring index vary depending on the material and wire thickness, so please consult us if you have any concerns. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Tsuruga Spring Co., Ltd. for springs We also support web conferences.

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Causes and Measures of Spring Deformation and Sagging

Causes and Measures of Spring Deformation and Sagging

By changing the specifications of the spring, it is possible to prevent sagging.

We have received inquiries about the issue of 'the spring's force weakening during use.' This is caused by 'sagging.' 'Sagging' is a phenomenon where the material undergoes plastic deformation during the use of the spring, resulting in a change in the dimensions of the spring, which is due to insufficient material strength. Whether the material's strength is adequate can be calculated based on the spring's usage conditions. Countermeasures for 'sagging' involve changing the material to one with higher durability, increasing the wire diameter, and other specification changes. In doing so, we select specifications to ensure that the spring's force (spring constant and load) does not change; however, if there are restrictions on the space where the spring fits, we will proceed in consultation with the customer. If there are no issues with the material strength calculations, potential causes of 'sagging' may include: 1) improper heat treatment after spring forming, or 2) use in environments exceeding the heat resistance temperature. Our company addresses issues related to sagging, deformation, and other spring troubles. If you send us samples, we will verify the strength and durability and propose improvement measures. Our technical staff will respond carefully, so please feel free to consult with us.

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Twisted spring, return spring, torque spring

Twisted spring, return spring, torque spring

Please leave the design and selection of spring constants, moments, load calculations, and lifespan calculations to us.

A "torsion spring" is a type of spring that is twisted and commonly used in rotational mechanisms. It is known by various names such as torsion spring and return spring, but according to JIS standards, it is referred to as "twisted coil spring" or "torsion spring." The length and shape of the arms can vary depending on the mounting method, but at our company, we not only manufacture but also handle design and prototyping. Please leave the calculation of spring constants (spring rates), moments, loads, and lifespan to us for design, selection, and prototyping. If you provide us with rough conditions such as the desired force and mounting space, we will design and propose the optimal specifications. If you are experiencing issues with your current "torsion spring," we will redesign it. We also accommodate short lead times for prototypes. Being able to deliver urgent prototypes in a short time frame is one of the advantages we offer. We manufacture wire diameters from Φ0.15mm to Φ8mm in-house. For diameters less than Φ0.15mm or greater than Φ8mm, we can also accommodate external production. If you have any issues with torsion springs, please feel free to consult us. Phone: 0235-22-0407 Technical Contact: Ujiie

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Torsion spring, phosphor bronze wire C5191W Φ0.3, contact spring.

Torsion spring, phosphor bronze wire C5191W Φ0.3, contact spring.

We deliver in pallet packing to prevent entanglement.

The material used is "Phosphor Bronze Wire - C5191W". Phosphor bronze has high electrical conductivity and good plating and soldering properties, making it suitable for use in switches, connectors, and springs for electronic devices. It also has excellent corrosion resistance, particularly against corrosion from freshwater and seawater. To use phosphor bronze wire for springs, heat treatment is necessary. Low-temperature annealing after spring forming increases hardness and imparts springiness. (This is referred to as low-temperature annealing hardening.) These springs are formed using a multi-forming machine. During delivery, to prevent deformation due to entanglement between products, each one is separated into small portions on a pallet. If you have any issues with torsion springs, please feel free to consult us. Phone: 0235-22-0407 Technical Contact: Ujiie Tsurugaoka Spring Co., Ltd. for springs and springs Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web conferencing.

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Tension spring with a narrowed round hook

Tension spring with a narrowed round hook

If it is a "squeezed round hook," you can design the body and the hook separately.

The hook shape that resembles a photograph is referred to as "tapered round hook" in JIS standards. It has a structure that incorporates a hook with a stop processing into the body of the spring, making it a hook shape that is strong against breakage and deformation. With a "tapered round hook," the body and hook can be designed separately. This allows for an increase in the strength of the hook without changing the spring's force adjustment (spring constant or load), making it an effective means when redesigning existing springs to be less prone to breakage. Many people seem to consider "broken springs as consumables," but by changing the specifications of the spring and the shape of the hook, the durability of the spring can be improved. Our company addresses issues such as spring breakage and deformation. If you send us broken samples, we will propose countermeasures and, if desired, we can also produce improved prototypes. Our technical staff will respond carefully, so please feel free to consult with us. Tsurugaoka Spring Co., Ltd. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web conferencing.

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Twisted spring SWP-AΦ6.0 clutch return spring

Twisted spring SWP-AΦ6.0 clutch return spring

To reduce the variation in moment, the initial tension is processed to be slightly weaker.

The material used is "Piano Wire Type A - SWP-A." To minimize the variation in moment (torque), the initial tension is processed as weakly as possible. Initial tension refers to the force that causes the wires to try to adhere to each other, and if this initial tension is too strong, it can affect the moment of the torsion coil spring. Conversely, in the case of tension springs, this initial tension is utilized to manage the load. If you have any issues with springs, please feel free to consult us. Our technical staff will respond carefully. Technical contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Tsuruga Hatsujo Co., Ltd. for springs We also support web meetings.

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Cone spring SWP-BΦ2.9 taper spring

Cone spring SWP-BΦ2.9 taper spring

One turn at both ends of a compression spring is called a "seat coil," and the terminology varies depending on the shape (closed end, open end, etc.).

The material used is "Piano Wire B Type - SWP-B." One coil at both ends of a compression spring is called a "seat coil." To ensure stability when the spring is upright, the tip of the "seat coil" is usually made to closely contact the adjacent coil. This shape is referred to as "closed end." If the tip of the "seat coil" is separated from the adjacent coil, it is called "open end," but this is not very common, and unless specifically instructed, it will be manufactured as a "closed end." The springs in the photo also have "closed ends" at both terminals. It is a bit difficult to see, but the seat coil at the front has a tapered shape that becomes smaller. The surface treatment is "electroless nickel plating." If you have any issues with springs, please feel free to consult us. Our technical staff will respond carefully. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Tsuruga Spring Co., Ltd. for springs We also support web meetings.

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Tension Spring Special Hook SWP-A2.0

Tension Spring Special Hook SWP-A2.0

We can accommodate hooks with special shapes that are not specified in JIS standards.

The material is "Piano Wire Type A, SWP-A," and the wire thickness is Φ2.0. The hook shape of this spring is a special one not specified by JIS standards. It is narrowed inward once, and the hook is raised from the center of the body. Due to the difficulty of handling it with a multi-forming machine, the hook is shaped by hand. After shaping, heat treatment (low-temperature annealing) is applied to remove processing strain, and it is coated with zinc plating for rust prevention. If you have any issues with springs, please feel free to consult us. Our technical staff will respond carefully. Technical contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Tsuruga Spring Co., Ltd. for springs. We also support web meetings.

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Twisted spring SWP-AΦ1.2 return spring

Twisted spring SWP-AΦ1.2 return spring

We manufacture dedicated positioning jigs and other tools to maintain and manage dimensional accuracy.

The material used is "Piano Wire Type A - SWP-A." According to customer requests, the positional relationship between the larger and smaller coils is important. However, it was quite difficult to measure the dimensions accurately with calipers or height gauges. After discussions, we created a positioning jig using two pin gauges of different sizes. By assembling the springs one by one into the jig, we were able to measure and manage the dimensions. There are various requests from customers regarding the dimensions and shapes of the springs. In some cases, we manufacture dedicated jigs like this one to maintain and manage dimensional accuracy. If you have any issues with springs, please feel free to consult us. Our technical staff will respond carefully. Technical contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Tsuruga Spring Co., Ltd. for springs We also support web meetings.

  • Contract manufacturing

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Tension Spring SWP-BΦ5.0 Left-Handed

Tension Spring SWP-BΦ5.0 Left-Handed

It is a rare case where a "left-handed" spring is used in a tension spring.

The material used is "Piano Wire Type B, SWP-B," with a wire diameter of Φ5.0. The body part is wound using a heart gold type winding machine, while the hook part is shaped by hand. After heat treatment, an electroless nickel plating is applied as a rust prevention treatment. The winding direction of this spring is "left-handed." To determine the winding direction, if you stand the spring upright and look at it from the side, if the coil material is winding upwards to the right, it is right-handed; if it is winding upwards to the left, it is left-handed (according to JIS standards). For compression springs and tension springs, unless otherwise specified, they will be manufactured as right-handed. In particular, it is very rare for left-handed winding to be adopted for tension springs, and I would like to ask our customers someday why this spring is left-handed. Our company handles the manufacturing, design, and prototyping of tension springs. Please feel free to consult us if you have any concerns. Tsuruoka Spring Co., Ltd. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web conferencing.

  • Contract manufacturing

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