西河スプリング List of Products and Services

Heat treatment is performed to eliminate distortion after spring forming and to stabilize it. The temperature and time are set according to the material and wire diameter. Previously, we used quenching treatment (heating followed by rapid cooling to harden), but now we perform tempering treatment (technically referred to as low-temperature annealing) in an electric furnace. When piano wire or steel wire undergoes tempering treatment, a thin oxide film forms on the surface, changing it to a blue color. This blue color is referred to as temper color. Please leave the design, estimation, and production of various springs to us. *For more details, please refer to the PDF document or feel free to contact us.

• Spring

The load of the spring increases in proportion to the amount of deflection. The spring constant refers to the load per 1mm of deflection. It is appropriate to set the spring constant between 30% and 70% of the total deflection amount. Tension springs have an initial tension, and deflection occurs when the load exceeds this initial tension. Please leave the design, estimation, and production of various springs to us. *For more details, please refer to the PDF document or feel free to contact us.

• Spring

To provide better products, we have updated our coiling machine and heat treatment equipment! <Details> Coiling Machine: Shinko Machine Industry Co., Ltd. Automatic Heat Treatment Equipment: Sankyo Co., Ltd. Additionally, we are offering "Spring Trivia" taught by Nishikawa Spring, which has been involved in spring manufacturing for about 50 years. Our company accepts product processing tailored to customer requests. If you have any issues with springs, please feel free to consult us. 【Published Content (Excerpt)】 ■ Trivia 1: Changes in coil diameter due to heat treatment (by material) ■ Trivia 2: Commonly used materials for springs ■ Trivia 3: Types of stainless steel wire for springs ■ Trivia 4: Types of oil-tempered wire *For more details, please refer to the PDF document or feel free to contact us.

• Spring
• Processing Contract

The free height (free length) is the height (length) of the spring when no load is applied in the case of a compression spring. In the case of a tension spring, the free length is the inner dimension between one hook and the other hook. When measuring the free length of a tension spring, measure the inner dimension directly between the hooks. If it is difficult to measure the inner dimension, measure the outer dimension between the hooks and subtract (wire diameter × 2) from that value. Please leave the design, estimation, and production of various springs to us. *For more details, please refer to the PDF document or feel free to contact us.

• Spring

The effective number of coils refers to the portion of the coil that acts as a spring, calculated by subtracting the number of end coils from the total number of coils in a compression spring. Generally, end coils are often one coil each at both ends, so in that case, the effective number of coils is total coils minus 2. If the first coil and the last coil do not contact the next (previous) coil, and the ground portion is 3/4 of a coil, the effective number of coils becomes total coils minus 1.5. It is considered good practice to have an effective number of coils of 3 or more. For tension springs, the total number of coils equals the effective number of coils (excluding the hook sections). Please leave the design, estimation, and production of various springs to us. *For more details, please refer to the PDF materials or feel free to contact us.*

• Spring

The seat coil count refers to the flat-looking parts at both ends of the compression spring, which do not act as coils. This seat coil often consists of one coil at each end, so in the case of a typical compression spring, it totals 1 coil + 1 coil, resulting in 2 coils. For springs where the tip of the coil is in contact with the next coil, the seat coil count is 2 coils, with one coil at each end. If the first and last coil sections are not in contact with the next (previous) coil section, and the polished section is 3/4 of a coil, then each end will be 0.75 coils, resulting in a seat coil count of 0.75 coils + 0.75 coils, totaling 1.5 coils. Please leave the design, estimation, and production of various springs to us. *For more details, please refer to the PDF materials or feel free to contact us.*

• Spring

The spring index (D/d) is the value of the coil's average diameter divided by the wire diameter. While there are other factors that affect ease of manufacturing, it is generally considered that this value should be between 4 and 20, with 7 to 13 being particularly suitable for spring production. Although a spring index of 4 to 20 is desirable, it is not an absolute requirement to stay within this range. However, producing springs outside of this range can be very difficult or even impossible, so it is advisable to keep it within this range as much as possible. Please leave the design, estimation, and production of various springs to us. *For more details, please refer to the PDF document or feel free to contact us.*

• Spring

Tension springs exert a force that tries to keep the coils in contact with each other even when unloaded, and this force is referred to as "initial tension." No deflection occurs until the load reaches the magnitude of the initial tension. When a force greater than the strength of this initial tension is applied, the contacting coil sections begin to open up. In general, when using hard steel wire as a standard, the initial tension for stainless steel wire is appropriately set to be 10-15% lower, while for phosphor bronze, brass wire, and nickel silver wire, it is set to be 50% lower. Please leave the design, estimation, and production of various springs to us. *For more details, please refer to the PDF materials or feel free to contact us.

• Spring

Our springs are being incorporated into some residential building materials. Even without drawings, we can assist you from the design stage, so please feel free to contact us. ★ If you would like a sample, please feel free to consult us through the <contact form>. * For more details, please download the PDF or feel free to contact us.

• others

Our springs are used in some agricultural machinery and tools. Even without drawings, we can assist you from the design stage, so please feel free to contact us first. ★ If you would like a sample, please feel free to consult us through the <inquiry form>. * For more details, please download the PDF or feel free to contact us.

• others

Our springs are used in various automotive parts and automotive machinery. Even without drawings, we can assist you from the design stage, so please feel free to contact us. ★If you would like a sample, please feel free to consult us through the <inquiry form>. *For more details, please download the PDF or feel free to contact us.

• others

We are introducing some little-known facts about springs that you may be hesitant to ask about now. Our company offers product processing tailored to our customers' needs. If you have any issues with springs, please feel free to consult us. 【Contents (excerpt)】 ■ Fact 1: Changes in coil diameter due to heat treatment (by material) ■ Fact 2: Common materials often used for springs ■ Fact 3: Types of stainless steel wire for springs ■ Fact 4: Types of oil-tempered wire *For more details, please refer to the PDF document or feel free to contact us.

• Spring
• Processing Contract

We would like to introduce the "special springs" handled by Nishikawa Spring Co., Ltd. Our springs are used in a wide range of fields, including various automotive parts, electrical appliances, medical devices, office supplies, sports equipment, and fishing gear, supporting Japanese manufacturing as a part of the components. We respond to various needs, from the thickness of a single hair to a diameter of 6 mm. We have the equipment to process shapes that are not shown in the sample photos, so please feel free to consult with us. 【Features】 ■ Wire diameter range: φ0.4 to φ4.0 mm ■ Equipped to process shapes not shown in sample photos ■ Capable of large lot production from prototype to high-speed production *For more details, please refer to the PDF materials or feel free to contact us.

• Spring

We would like to introduce our "wire processing" handled by Nishikawa Spring Co., Ltd. Our springs are used in a wide range of fields, including various automotive parts, electrical appliances, medical devices, office supplies, sports equipment, and fishing gear, supporting Japanese manufacturing as a part of the components. The wire diameter we can handle ranges from φ0.4 to φ4.0 mm. We have equipment capable of processing shapes that are not shown in the sample photos. 【Features】 ■ Wire diameter range: φ0.4 to φ4.0 mm ■ Equipped to process shapes not shown in sample photos ■ Capable of handling large lots with high-speed production from mass production prototypes *For more details, please refer to the PDF materials or feel free to contact us.

• Spring

We would like to introduce the "Twisted Spring" handled by Nishigawa Spring Co., Ltd. Our springs are used in a wide range of fields, including various automotive parts, electrical appliances, medical devices, office supplies, sports equipment, and fishing gear, supporting Japanese manufacturing as a part of these components. The wire diameter we accommodate ranges from φ0.4 to φ4.0mm. We have the equipment to process shapes that are not shown in the sample photos, so please feel free to consult with us. 【Features】 - Wire diameter range: φ0.4 to φ4.0mm - Equipped to process shapes not shown in sample photos - Capable of handling large lots with high-speed production from mass production prototypes *For more details, please refer to the PDF materials or feel free to contact us.

• Spring

We would like to introduce the "compression springs" handled by Nishikawa Spring Co., Ltd. Our springs are used in a wide range of fields, including various automotive parts, electrical appliances, medical devices, office supplies, sports equipment, and fishing gear, supporting Japanese manufacturing as a part of the components. The wire diameter we accommodate ranges from φ0.1 to φ6.0 mm. We possess equipment capable of special processing such as unequal pitch, conical shapes, and both ends tapered. 【Features】 ■ Wire diameter range: φ0.1 to φ6.0 mm ■ Equipped for special processing such as unequal pitch, conical shapes, and both ends tapered ■ Capable of mass production prototypes and large lot production at high speed *For more details, please refer to the PDF materials or feel free to contact us.

• Spring

We would like to introduce the "Tension Springs" handled by Nishikawa Spring Co., Ltd. The compatible wire diameter ranges from φ0.4 to φ4.0mm. We have the equipment to fully process tension springs with English hooks and German hooks. We can accommodate large production runs from prototype mass production to high-speed production. 【Features】 ■ Compatible wire diameter ranges from φ0.4 to φ4.0mm ■ Equipped to fully process tension springs with English hooks and German hooks ■ Capable of handling large production runs from prototype mass production to high-speed production *For more details, please refer to the PDF materials or feel free to contact us.

• Spring

Our company specializes in the design, manufacturing, and sales of various precision springs, focusing primarily on compression springs and tension springs, all under a unified system. By actively introducing advanced equipment, we achieve high-precision products. Our springs are used in a wide range of fields, including various automotive parts, electrical appliances, medical instruments, office supplies, sports equipment, and fishing gear, supporting Japanese manufacturing as a part of the components. 【Wire Diameter Range】 ■ Compression Springs: φ0.1 to φ6.0mm ■ Tension Springs: φ0.4 to φ4.0mm ■ Torsion Springs: φ0.4 to φ4.0mm ■ Wire Processing: φ0.4 to φ4.0mm ■ Special Springs: φ0.4 to φ4.0mm *Please feel free to contact us for more details.

• Contract manufacturing
• Spring