鶴岡発條 List of Products and Services

The twisted coil spring in the photo was designed and prototyped by our company. We have designed the specifications to meet the design conditions you provided below: 1) Coil inner diameter, 2) Load at installation to maximum angle, 3) Durability (1 million cycles) The designed spring can be produced in a short lead time. The spring in the photo was delivered in one week, and the ability to deliver prototypes quickly is one of the advantages we offer. We accept orders starting from one piece. Our company handles spring design and prototyping. Please also leave the calculations for compression springs and tension springs, as well as lifespan calculations, to us. If you provide us with rough design conditions, we will propose suitable specifications and manufacture prototypes. I believe some of you may be unsure about how to specify the design conditions for the spring. Our technical staff will respond carefully, so please feel free to consult with us. Tsuruga Spring Co., Ltd. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web meetings.

• Spring

The material is "stainless steel wire, SUS304," with a wire diameter of Φ4.0. The round bar of SUS is chamfered, grooved, and bent with an R bend process. After processing, ultrasonic cleaning is performed for degreasing. Final inspection is conducted using calipers and projectors before shipment. Our company specializes in springs, wire forming, and bending processing of round bars. Our technical staff will respond carefully, so please feel free to consult us if you have any concerns. Tsuruga Spring Co., Ltd. for springs Technical contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web meetings. (ZOOM, Skype, Microsoft Teams, etc.)

• Spring

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

• Spring

The material used is "spring stainless steel wire - SUS304-WPB." It is a double torsion spring, which may be a bit difficult to understand as it consists of two twisted springs connected together. Due to small lot production, we combine multi-forming machines and handmade processes for manufacturing. Dimensions that are difficult to measure with calipers are measured and managed using a projector. In our company, we not only manufacture double torsion springs but also handle design and prototyping. If you provide us with general conditions, we will propose the optimal specifications. If you have any issues with double torsion springs, please feel free to consult us. Our technical staff will respond carefully. Tsuruoka Spring Co., Ltd. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web meetings.

• Spring

The material used is "Piano Wire Type A (SWP-A)." There are mainly "Type A" and "Type B" piano wires, but for tension springs with hook processing or torsion springs with arm bending processing, we recommend using Type A (SWP-A) for better workability. After spring forming, heat treatment is performed, and trivalent chromate plating is applied as a rust prevention treatment. 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.

• Spring

We manufacture and design corner springs using square wire, from design to prototyping. When a large force is required in a limited space with restricted inner/outer diameters, corner springs made from square wire are effective. The advantage of using square wire is that it allows for a larger cross-sectional area of the material compared to round wire. (The larger the cross-sectional area, the greater the force the spring can exert.) The materials are generally custom-made, but we have a certain amount of stock available in-house. If we have materials on hand that approximate the required dimensions, we can quickly produce prototypes and other items. We can accommodate both iron-based spring materials (SWP-A, SW-C) and stainless steel spring materials (SUS304-WPB). If you have any issues 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

• Spring

The material used is "spring stainless steel wire - SUS304-WPB." The wire thickness is Φ4.5. The body part is processed by winding on a winding machine, and the arm part is bent by hand. After spring forming, heat treatment (low-temperature annealing) is applied to remove processing strain. For "torsion coil springs" like hinge springs, the initial tension is processed to be as weak as possible. Initial tension refers to the force that causes the wires in the coil to try to adhere to each other, and if this initial tension is strong, it affects the torque (moment) when twisted. In the case of "tension coil springs," on the contrary, this initial tension is utilized to control the load. If you have any issues with "springs" or "springs," please feel free to consult us. Our technical staff will respond carefully. Tsuruga Spring Co., Ltd. for springs and springs Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web meetings.

• Spring

The material used is "tin bronze wire - C5191W." Tin bronze wire is a material that has good workability and excellent corrosion resistance. It is also compatible with gold and silver plating, making it suitable for use in accessories. In similar shapes, we have a track record with "gold wire," "silver wire," and "platinum wire." Our company accepts wire forming processing for accessories and more. If you have any issues with springs or forming, 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 and spring products We also support web meetings.

• Spring

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.

• Spring

The spring in the photo is a breakage prevention product designed and prototyped by our company. It features a structure where a hook with a stop processing is incorporated into the body, referred to as a "drawn round hook" according to JIS standards. This hook shape is resistant to issues such as breaking and deformation. With a "drawn 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 (spring constant or load), making it an effective means when designing springs to be less prone to breaking. While not as strong as the "drawn round hook," the "round hook (large bend radius)" is also a hook shape that is resistant to breaking and deformation. From a cost perspective, the "round hook (large bend radius)" is advantageous, so I believe it is worth considering as well. For more information on round hooks, please refer to the related links. If you are experiencing troubles with springs, such as breakage or deformation, please feel free to consult us. If you send us broken samples, we will propose improvement measures. Tsurugaoka Spring Co., Ltd. Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web meetings.

• Spring

We are processing 2.0 x 3.0 mm square wire into coils. The material of the square wire is iron-based spring material "Piano Wire Type A, SWP-A." The surface treatment is trivalent chromate plating. A shaft is passed through the inner diameter side, and it is used as a conveyor to transport powders and other materials. Our company applies wire winding and bending technology to manufacture various parts, not limited to springs. Our technical staff will respond carefully, so please feel free to consult with us. Tsurugaoka Spring Co., Ltd. for springs and springs Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web meetings.

• Spring

The material used is "spring stainless steel wire - SUS304-WPB." The wire thickness is Φ1.2. All bending processes are performed using a multi-forming machine. After clip forming, heat treatment is applied to remove residual stress and stabilize the shape. This heat treatment is called "low-temperature annealing." A delivery will include an inspection report with a material certificate (mill sheet). Our company specializes in spring and wire forming processing. Please feel free to consult us if you have any concerns. Tsuruga Spring Co., Ltd. for springs and springs Technical contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web conferencing.

• Spring

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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The material used is "Piano Wire Type A, SWP-A." The wire diameter is Φ9.0. After forming the spring, it undergoes heat treatment, and both ends are ground flat. The purpose of grinding the ends is to improve the seating of the spring and ensure perpendicularity. The perpendicularity of the spring after grinding is managed according to our internal standards, maintaining a precision of JIS Grade 2 or higher. (Note: JIS Grade 2 perpendicularity = 0.05Hf = 2.9 degrees) To prevent rust, a cationic electrodeposition coating is applied. If you have any issues with "springs," please feel free to consult us. Our technical staff will respond carefully. Phone: 0235-22-0407 Technical Contact: Ujiie Tsuruga Spring Co., Ltd. for springs Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web meetings.

• Spring

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.

• Spring

The material is "spring stainless steel wire SUS304-WPB," with a wire thickness of Φ0.8. This is a prototype hook for suspending medical devices. Since a certain level of strength is required, spring stainless steel wire is used instead of regular stainless steel wire. Spring stainless steel wire SUS304-WPB has approximately 1.7 to 3.2 times the strength of regular stainless steel wire SUS304, allowing for miniaturization and weight reduction. As it was a small order for a prototype, it was handmade. It was shaped using a combination of general-purpose bending molds and subjected to heat treatment (low-temperature annealing) to eliminate residual stress. Our company specializes in spring processing and wire bending. Please feel free to consult us if you have any concerns. Tsurugaoka Spring Co., Ltd. Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com

• Spring

The material is "phosphor bronze wire C5191W," and the wire diameter is Φ0.23. This is a return spring used in solenoid valves. "Phosphor bronze wire C5191" has a lower elastic modulus compared to other spring materials like piano wire, which allows for a lower spring constant. A lower spring constant helps to reduce load fluctuations caused by variations in free length, making it easier to manage the load at the specified height. After spring forming, heat treatment is applied. Heat treatment increases the hardness of phosphor bronze wire and enhances its spring properties (this is called low-temperature annealing hardening). 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 Springs Co., Ltd. for springs We also accommodate web meetings.

• Spring

The material used is "Piano Wire Type A, SWP-A," with a wire diameter of Φ3.5. The body part is processed using a core wire type winding machine. For small lot production, we can achieve cost advantages compared to processing with a multi-forming machine. To manage the initial tension, we use a winding machine with NC control to regulate the winding hardness. The initial tension refers to the force with which the wires in the body part try to adhere to each other, and it can be adjusted by our manufacturer's force. The hook on the right side is a "U hook," while the hook on the left side is a special shape not specified by JIS standards. Both hooks are smaller than the body, but of course, they can be processed to be smaller or larger. After spring forming, heat treatment (low-temperature annealing) is performed, and rust prevention oil is applied before shipping. If you have any concerns regarding "springs," please feel free to consult us. Our technical staff will respond carefully. Tsurugaoka Spring Co., Ltd. for springs Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web meetings.

• Spring

The material used is "Piano Wire Type A, SWP-A." Due to the wire diameter of Φ6.0 being thick, it is processed using a core wire type winding machine. The core wire type winding machine can process up to a maximum of Φ10mm. After winding, both ends are manually raised, and heat treatment (low-temperature annealing) is performed to remove processing strain. The surface treatment is "trivalent chromate plating + baking." 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.

• Spring

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.

• Spring

The material used is "spring stainless steel wire - SUS304-WPB." Since it is used in applications that come into contact with human hands, we pay special attention to shaping it to ensure there are no burrs or sharp edges. Our company specializes in spring processing and forming. Please feel free to consult us if you have any concerns. Tsuruga Spring Co., Ltd. for springs Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com

• Spring

This is a contact spring for electronic components. It uses a high electrical conductivity copper alloy "phosphor bronze wire - C5191W." "Phosphor bronze wire" is widely used as a material for springs in electronic devices and information communication equipment due to its excellent corrosion resistance and good solderability. Compared to other spring materials like piano wire, the softer and more workable "phosphor bronze wire" increases in hardness and exhibits "springiness" when heat-treated. (This is referred to as low-temperature annealing hardening.) This contact spring is also heat-treated after forming and has a "gold plating" surface treatment. In addition to "phosphor bronze wire," other materials used for contact springs include "spring stainless steel wire - SUS304-WPB" and "nickel-plated steel wire - SWIC-F." Our company handles the manufacturing, design, and prototyping of torsion springs. Please feel free to consult us if you have any concerns. 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 and springs We also support web meetings.

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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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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.

• others

The material used is a general-purpose spring material, "spring stainless steel wire - SUS304-WPB." Similar shapes have been successfully made with "piano wire type A - SWP-A" and "beryllium copper wire - C5191W." Spring materials generate residual stress (processing strain) due to forming processes such as bending and coiling. If left untreated, residual stress can lead to deformation and other issues, so stress relief heat treatment is performed after the forming of spring materials. This process is conducted at relatively low temperatures of 200 to 450 degrees, which is referred to as low-temperature annealing. 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 Tsuruoka Spring Co., Ltd. We also support web meetings.

• Spring