鶴岡発條 List of Products and Services

The material used is "spring stainless steel wire SUS304-WPB." According to JIS standards, "spring stainless steel wire" is classified into types A, B, C, and D. Although "SUS304" does have a type A variant, "SUS304-WPA," in JIS standards, its market presence is virtually nonexistent. This is likely because the stronger type B, "SUS304-WPB," is widely adopted. In this way, there are actually quite a few materials that "exist according to JIS standards but have low marketability." Even for such materials with low marketability, wire manufacturers may accommodate special orders. If you have any issues not only with "springs" but also with spring materials, 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 conferencing.

• Spring

This is a spring for pressure adjustment in hydraulic and pneumatic equipment. This spring is processed through coiling while inspecting and adjusting the free length with a sensor called a "length measuring device" to manage the mounting load and maximum load. The variation in spring load is almost proportional to the variation in free length, so controlling the free length with this measuring device is effective. The mounting load to maximum load is measured and managed using a spring load testing machine. The spring load testing machine is calibrated by the manufacturer once a year, and in addition, we conduct internal self-inspections every three months to ensure measurement accuracy. A test report that outputs data such as load and spring constant will be attached upon delivery. 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 We also support web conferencing.

• Spring

The material used is "spring stainless steel wire - SUS316-WPA." Compared to the general-purpose SUS spring material "SUS304-WPB," it has higher corrosion resistance and is often used for springs in locations exposed to seawater, food factories, and pharmaceutical factories. Additionally, while "SUS304-WPB" is weakly magnetic, "SUS316-WPA" is almost non-magnetic. This spring is used in the switch part of a certain interior product. The mounting load in the assembled state and the maximum load when the button is pressed are measured and managed using a spring load testing machine. The shipping inspector checks each lot and attaches a material certificate (mill sheet) and inspection report before shipment. 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 We also support web conferencing.

• Spring

The material used is "spring stainless steel wire - SUS316-WPA." It is a material that has superior corrosion resistance compared to the general-purpose stainless spring material "SUS304-WPB." After spring forming, a passivation treatment is applied to further enhance corrosion resistance. The passivation treatment is a process that strengthens the chromium oxide film (passive film) on stainless steel. A wire diameter of Φ2.3mm is used. To reduce costs during mass production, grinding at both ends has been omitted. 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 conferences.

• Spring

We are processing 3mm x 3mm square bars through coiling. The material is "stainless steel wire, SUS304." The inner diameter side is welded to a shaft and used as a conveyor for transporting powders and viscous materials. To maintain a consistent winding pitch, we use a CNC-controlled winding machine. 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. 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 SUS631-WPC." "SUS631-WPC" is a higher strength material compared to the general-purpose spring material "SUS304-WPB" and is often used in applications requiring heat resistance. The heat resistance temperature (permissible use temperature) is approximately 340 degrees for "SUS631-WPC" and about 290 degrees for "SUS304-WPB." "SUS631-WPC" is a precipitation-hardened material that acquires the required strength and heat resistance through heat treatment after spring forming. This heat treatment is referred to as precipitation hardening or aging treatment, with a heat treatment temperature of 470 degrees ± 10 degrees and a heat treatment time of 60 minutes as specified by JIS standards. This spring is called a "double torsion spring," and it has a shape where two torsion coil springs are connected. The left and right coils operate independently, so calculations for moments and lifespan are generally performed separately for each side. (In cases where the dimensions and usage are exactly the same, calculations can be completed for just one side.)

• Spring

The material is "spring stainless steel wire SUS304-WPB," with a wire diameter of Φ1.2. The material used for spring forming is usually wound in a coil shape. (Think of the wire sold at home improvement stores.) For SUS304-WPB with a diameter of Φ1.2, the weight per coil is approximately 60 kg. The coiled material has a curl known as "wire memory." Typically, during spring forming, the material is passed through a straightening machine to make it straight, but if the arms are long like in the photo of the spring, the effects of "wire memory" may remain. In such cases, we use a material that has been pre-straightened, referred to as "straight wire." This spring is also made using "straight wire," processed with a winding machine and handmade. After spring forming, heat treatment (low-temperature annealing) is applied to remove processing strain. 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." It is a torsion spring used in the rotating link mechanism. We received a request from a customer for urgent design and prototyping. Since the quantity was 10 pieces, we processed them by hand instead of using a multi-forming machine. We completed everything from design to prototype delivery in 5 days. Our company handles the manufacturing, design, and prototyping of torsion springs. You can also rely on us for short delivery times. Please feel free to consult us if you have any concerns. 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 meetings.

• Spring

The material used is "hard steel wire SW-B." A single wire is intricately bent and processed. The bending process consists of 11 steps. Dimensions that are difficult to measure with calipers or projectors are managed using dedicated inspection jigs. The surface treatment is "electroless nickel plating." Our company specializes in spring processing and wire forming. 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 We also support web meetings.

• Spring

The double torsion spring has a shape that connects two "torsion springs." The coils on the left and right operate independently, so the moment (torque) and estimated lifespan are evaluated separately for each side. (If the dimensions are the same, only one side will be sufficient.) The formulas for torsion springs are used for moment calculations and lifespan calculations. This product is a double torsion spring designed and prototyped by our company. We received a request for assistance because the desired torque was not being achieved, so we helped with the design. Since this is for an application that comes into contact with chemicals, we used "SUS316-WPA," which has superior corrosion resistance compared to the general-purpose spring material "SUS304-WPB." If you are having trouble with double torsion 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 meetings.

• Spring

It may be a bit difficult to see, but it has a shape resembling two twisted springs connected together. A small coil bridges the left and right coils, functioning as a single twisted spring. The material used is "Piano Wire Type A, SWP-A." After spring forming with a multi-forming machine and handmade techniques, heat treatment (low-temperature annealing) is performed to remove processing strain. The surface treatment is "Glossy Tin Plating + Baking Treatment (Hydrogen Embrittlement Removal)." If you have any issues with springs, please feel free to consult us. Our technical staff will respond carefully. If you have any issues with 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 conferencing.

• Spring

The material used is "Piano Wire Type A, SWP-A," with a wire diameter of Φ0.3. The shape of the hook is a "U hook." It is a commonly adopted shape alongside "reverse round hooks" and "round hooks." Although it is a shape that can be fully processed with a multi-forming machine, due to small lot production, the hook part is processed by hand. In the case of small lot production, incorporating handmade processes can help reduce costs, not just for this spring. 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 We also support web meetings.

• Spring

The material used is "spring stainless steel wire SUS316-WPA." The common spring material SUS is "SUS304-WPB," but when greater corrosion resistance is required or low magnetism is desired, "SUS316-WPA" is used. This spring is formed using a multi-forming machine. The wire diameter is Φ0.14mm, and since it is a very small spring, dimensions and angles are measured and managed using a projector instead of calipers. 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 We also support web conferencing.

• Spring

The material used is "Piano Wire Type A, SWP-A." Piano wire is a representative iron-based spring material. Although it is labeled as "piano wire," the industrial piano wire specified by the JIS standard "JIS G3522" is actually not used in musical instruments. The piano wire used for instruments is called music wire and is distinguished from industrial types. This spring is formed using a multi-forming machine. After forming, it undergoes heat treatment (low-temperature annealing) and is treated with electroless nickel plating for rust prevention. If you have any issues with 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 conferencing.

• Contract manufacturing

The material used is "polished round steel - SGD." After being bent by hand, it undergoes phosphate treatment for rust prevention. Since polished round steel is a so-called raw material, no heat treatment is performed after processing. For similar shapes, we have a track record with the following materials: 1) Ordinary iron wire - SWM-F 2) Piano wire - SWP-A, SWP-B 3) Hard steel wire - SW-B, SW-C 4) Stainless steel wire - SUS304-W1 5) Spring stainless steel wire - SUS304-WPB Our company handles spring processing and bending of round bars. Please feel free to consult us if you have any concerns. Turuoka Spring Co., Ltd. Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web conferencing.

• Contract manufacturing

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

The photo shows a torsion spring designed and prototyped by our company. The material is "spring stainless steel wire, SUS304-WPB," with a wire diameter of Φ0.35. We selected specifications that meet the design conditions specified by the customer: 1) coil inner diameter, 2) load at the maximum angle during installation, and 3) a durability of over 100,000 cycles. Our company handles the design and prototyping of torsion springs. If you provide us with your desired design conditions (even if they are rough), we will propose the optimal specifications. We encourage first-time customers to consult with us without hesitation. In fact, most of our customers who reach out to us have not had any previous transactions with us. We look forward to your inquiries. 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

The material used is "spring stainless steel wire - SUS304-WPB." The wire thickness is Φ0.5mm. To prevent the hook from coming off during use, a double hook is adopted. The number of turns of the hook is approximately 1.5, with no gaps. Due to the specifications for installation load and maximum load, data will be output using a spring load testing machine, and a test report will be attached upon delivery. If you have any questions about springs, please feel free to consult us. 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

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

1) We handle the design, selection, and prototyping of springs. Please leave the design, specification selection, spring constant, load calculations, and lifespan calculations to us. If you are experiencing issues with spring breakage, deformation, or sagging, please feel free to consult us. There are many cases where improvements can be made by innovating the specifications of the springs. 2) We also accommodate short lead-time prototypes. The ability to bring designed springs to shape in a short time is one of the advantages we offer. 3) We can handle wire diameters from Φ0.1mm to Φ10mm. Even if the diameter is less than Φ0.1mm or more than Φ10mm, we can accommodate it through outsourcing. 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 conferences.

• Contract manufacturing

The material used is "spring stainless steel wire - SUS304-WPB." This spring requires the hooks at both ends to be fixed with screws during assembly, making the opposing angle of the hooks important. Therefore, we manage the opposing angle of the hooks with a rather strict tolerance of "±5 degrees." According to JIS standards, the allowable tolerance for the opposing angle of the hooks is defined as "by agreement between the parties." In fact, it does not explicitly specify "plus or minus how many degrees." Our company has established internal standards separate from JIS standards to manage the opposing angle of the hooks. Additionally, if customers have stricter requests, we respond as much as possible by creating limit samples and other means. 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

This product is wire forming using "stainless steel wire for springs, SUS304-WPB." Our company is a spring manufacturer, but we also handle wire forming and bending processes like this product. This product is shaped using a multi-forming machine and then subjected to heat treatment (low-temperature annealing). To prevent tangling between products during delivery, each item is packed on a pallet before shipping. 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. in Tsuruoka, specializing in springs. We also support web meetings.

• Contract manufacturing

The material of this product is "Piano Wire Type B, SWP-B." The body is coiled larger than the ends, and one side is tightly wound. To secure the bolt that is screwed into the inside of the tight winding, the inner diameter tolerance is managed using a pin gauge. The surface treatment is a combination of zinc plating and baking treatment (to remove hydrogen embrittlement). To prevent misuse with similar springs, identification painting is applied. The paint on this spring is blue, but we have various identification painting options such as red, yellow, and green based on customer requests. 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

The material used is "spring stainless steel wire - SUS316-WPA." This hook with a ring is designed for use in water environments, utilizing "SUS316-WPA," which has excellent corrosion resistance to both fresh and seawater. Winding and bending processes are carried out using a multi-forming machine, and after heat treatment (low-temperature annealing), passivation treatment is applied to enhance corrosion resistance. If you have any issues with springs or forming, please feel free to consult us. Our technical staff will respond carefully. Tsurugaoka Spring Co., Ltd. Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web conferencing. (ZOOM, Skype, Microsoft Teams, etc.)

• Contract manufacturing

This is a spring used in the plunger reciprocating mechanism of a solenoid valve. The material used is "spring stainless steel wire SUS316-WPA." It has superior corrosion resistance compared to the general-purpose spring material SUS304-WPB and is a non-magnetic material. This spring is processed through coiling while inspecting and adjusting the free length with a sensor called "kenchouki" to suppress variations in the mounting load. The variation in the mounting load is almost proportional to the variation in the free length, making control with the same sensor effective. 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. Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web conferencing.

• Contract manufacturing

The load calculation for tension springs is somewhat complex, involving an unfamiliar force called "initial tension." Additionally, lifespan calculations differ from those for compression springs, as they must also consider the durability of the hook section, making this process complex as well. If you have any concerns, please feel free to consult with us. If you provide us with general conditions, we will design the tension spring for you. Of course, if there are any issues with the tension spring you are currently using, we can also redesign it for you. If you are unsure about which specifications to choose for a tension spring, you can leave it to us. It's okay if you don't have any drawings. Our technical staff will respond carefully, so please feel free to consult with us. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Tsuruga Spring Co., Ltd., specializing in springs. We also support web meetings.

• Contract manufacturing

The most common issue we receive inquiries about regarding springs is the breakage or damage of tension springs. In particular, most cases involve the hook or the part where it catches breaking. Tension springs have a characteristic where stress (load) concentrates at the hook, which can lead to breakage or deformation. The photo shows a spring designed and prototyped by our company in response to inquiries, aimed at preventing breakage. We considered the specifications of the spring to ensure that the stress (load) on the hook does not exceed the material's strength, and we adopted a "large round hook with a bending radius." The spring's force adjustment (spring constant, load) has not been changed. If the durability of the "large round hook with a bending radius" is still insufficient, we recommend adopting a "tapered round hook," although this will slightly increase costs. (Please refer to the related links.) If you are experiencing issues with spring breakage, damage, or deformation, please feel free to consult us. If you send us broken samples, we will propose improvement measures. We look forward to your inquiries. Tsuruoka Spring Co., Ltd. Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com

• Contract manufacturing

The material used is "Piano Wire Type A, SWP-A." Including hook processing, the springs are formed using a multi-forming machine. The hook shape of this spring is a "U hook." It is a representative hook shape alongside the "reverse round hook" and "round hook." Special care is taken in processing the hook part of tension springs. Stress (load) tends to concentrate on the hook part, and even a slight scratch can lead to problems such as breakage or deformation. To prevent the occurrence and outflow of scratches, we perform double checks using tool wrapping and magnifying glasses. The rust prevention treatment consists of trivalent black chromate plating plus hydrogen embrittlement removal. 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 We also support web conferencing.

• Contract manufacturing

The material used is "hard steel wire SW-CΦ1.0". Using a multi-forming machine, we bend the coil material while correcting its "wire shape". The accuracy of the straight sections is managed to a straightness of Φ0.6. For surface treatment, we apply nickel plating compatible with soldering to ensure solderability. If you have any issues with springs or wire forming, 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 Also available for web meetings.

• Contract manufacturing

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.

• Contract manufacturing

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.

• Contract manufacturing

The material used is "spring stainless steel wire - SUS304-WPB." The wire thickness is Φ0.8mm. The hooks at both ends have a special shape that is not found in JIS standards. They rise straight from the side of the coil and are shaped larger than the body. Of course, they can also be shaped larger or smaller. 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.

• Contract manufacturing

The material used is "Bainite steel plate." Bainite steel plate is a heat-treated steel plate made from iron. It has been pre-treated to possess the necessary hardness (around HRC45) for spring materials. In JIS notation, it is represented as "S60C-CSP-B." Since it is a material with good workability, it can also be bent. After bending, heat treatment (low-temperature annealing) is applied to remove processing strain. After low-temperature annealing, anti-rust oil is applied. In addition to coil springs, our company also manufactures leaf springs both in-house and externally. Please feel free to contact us. Technical Contact: Ujiie Phone: 0235-22-0407 Tsuruga Spring Co., Ltd. for springs and springs Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com

• Contract manufacturing

The material is "hard steel wire - SW-C," and the wire diameter is Φ0.8. Hard steel wire is a commonly used iron-based spring material, alongside piano wire. The ends of this product are cut at an acute angle of approximately 30 degrees to facilitate easy insertion into the counterpart components. The processing steps include shaping into a U-shape using a multi-forming machine, heat treatment (low-temperature annealing), and cutting at a 30-degree angle. Our company specializes in spring processing and wire forming. Please feel free to consult us if you have any concerns. Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Contact: Ujiie We also accommodate web meetings. Tsuruga Spring Co., Ltd. in Tsuruoka.

• Contract manufacturing

We received a request from a customer for "compression springs that fit perfectly in a vertically long space." The result, which meets the requirements for free length, installation, and maximum load, is this oval spring. This is a spring coiled in an oval shape (not exactly oval, but elongated oval) rather than a round coil. The material used is round wire "spring stainless steel wire, SUS304-WPB." We have processing experience with similar shapes using "piano wire (SWP-A, SWP-B)" and "beryllium copper wire (C5191W)." If you have any issues with springs, please feel free to consult us. Our technical staff will respond carefully. Turuoka Springs Co., Ltd. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web conferencing.

• Contract manufacturing

The material used is "spring stainless steel wire SUS304-WPB." The wire diameter is Φ0.4. An important index in the design and processing of springs is the spring index. The spring index is a value that serves as a guideline for the difficulty of processing a spring, calculated by dividing the average coil diameter by the wire diameter. A small spring index results in a tight and difficult winding, while a large spring index leads to a loose and unstable winding. According to JIS standards, a spring index of "4 or more and 22 or less" is considered desirable. This spring has an average coil diameter of 12mm and a wire diameter of 0.4mm, resulting in a spring index of 12mm ÷ 0.4mm = 30. This indicates a spring index that exceeds 22, making it a loose and unstable winding pattern; however, it seems to be wound quite neatly. If you have any concerns regarding springs, please feel free to consult us. 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

The material used is "Piano Wire Type A, SWP-A." The body part is intentionally wound with gaps. This aims to eliminate the effects of initial tension and stabilize the load. If the spring body is wound without gaps, a force arises that causes the wires to try to adhere to each other, known as initial tension. Initial tension cannot avoid a certain degree of variation, which also affects load variation. By creating gaps in the body, as in this spring, the initial tension becomes zero. Although winding with gaps introduces variation in free length, if the amount of deflection that absorbs this variation can be secured, it is a method that allows for precise load management. 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 accommodate web meetings.

• Contract manufacturing

The material used is "spring stainless steel wire - SUS304-WPB." It is wire forming with 10 bending processes. After shaping, heat treatment (low-temperature annealing) is applied to remove processing strain. Our company specializes in wire forming processing. We have experience with various materials and shapes, so please feel free to consult us if you have any concerns. Phone: 0235-22-0407 Contact: Ujiie Tsuruoka Spring Co., Ltd. Phone: 0235-22-0407 Fax: 0235-22-0546 Email: web@tohj.com

• Contract manufacturing

The material is "stainless steel wire - SUS303," with a wire diameter of Φ4.0. The Φ4.0 bar material is chamfered and processed into a hook shape with M4 threads cut. Our company specializes in forming and bending processes like this product. We can accommodate wire diameters up to Φ8mm, and we also have experience with materials other than SUS, such as ordinary iron wire (SWM) and polished round steel (SGD). This product is shipped after removing contaminants through ultrasonic cleaning following deburring. If you have any issues with springs or forming, please feel free to consult us. Tsurugaoka Spring Co., Ltd. Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web conferencing.

• Contract manufacturing

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.

• Contract manufacturing

The material is "spring stainless steel wire - SUS304-WPB," with a wire diameter of Φ0.5. After bending processing with a multi-forming machine, the tip is flattened (indicated by the yellow arrow). The flattening process is finished by hand using a dedicated jig. The flattened part functions as a retention stop during the subsequent resin coating process. Our company offers wire forming and bending processing services. Please feel free to consult us if you have any concerns. Our technical staff will respond carefully. Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Technical contact: Ujiie Tsuruoka Spring Co., Ltd. We also support web conferencing.

• Contract manufacturing

Material: Stainless steel wire for springs, SUS304-WPB Wire diameter: Φ0.8 The hook shape is a round hook. Originally, it is a hook shape that is resistant to breakage and deformation, but by increasing the bend radius at the hook's rise, the strength is further enhanced. This spring is a breakage countermeasure product that we redesigned and prototyped at the request of our customer. We have improved durability without changing the spring's force adjustment (spring constant, load). If you are experiencing issues with spring breakage, deformation, or damage, please feel free to consult us. If you send us broken samples, we will propose improvement measures. Technical contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Tsuruga Spring Co., Ltd. We also support web meetings.

• Contract manufacturing

The 18-karat gold wire is shaped into a hook design with a loop. It is small and hard to see, but the arrow section has the "K18" stamp engraved on it. From the shaping of the hook to the engraving, it is processed consistently using a multi-forming machine. We have a track record of similar shapes made from silver wire and platinum wire. Our company also accepts wire forming processing for accessories and other items. Please feel free to consult us if you have any concerns. Spring and spring manufacturing by Tsuruoka Spring Co., Ltd. Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web conferencing (ZOOM, Skype, Microsoft Teams, etc.)

• Contract manufacturing

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.

• Spring

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.

• Spring