國光スプリング工業 Product Lineup

At Kokusai Spring Industry, we handle "harnesses." We provide integrated processing from the molding of wire harnesses (equipment wiring for industrial products) to insulation removal on machines. Upon request, we can also accommodate crimping and assembly by hand. Additionally, our products are certified by UL (safety organization). For more details about other products, please contact us. 【Main Service Range】 <Wire Processing> ■Material: AWG8 (φ4.89) to AWG18 (φ2.65) *We can also accommodate products outside this range. *For more details, please refer to the PDF document or feel free to contact us.

• Harness

At Kokusho Spring Industry, we handle "wire springs." We specialize in precision springs, ultra-fine springs, and micro springs for various fields, ranging from equipment and machinery to digital products and medical devices. Additionally, we can also handle wire processing beyond springs. We will manufacture various products according to your needs. 【Main Range of Coiling Processing】 ■ Wire Diameter: φ0.06 to 4.0mm ■ Outer Diameter: φ0.5 to 70mm ■ Free Length: Up to 30m (with proven results) ■ Materials: SUS304WPB, SUS316WPA, SUS631J1-WPC, SWP-B, SW-C, PBW, SWIC, etc. *Products outside of this range can also be accommodated. *For more details, please refer to the PDF materials or feel free to contact us.

• Spring

This is an introduction to a case study that achieved cost reduction proposed to an electrical equipment manufacturer. They were purchasing leaf spring products from another company, but the costs were high. They reached out to Kokkō Spring Industry to see if we could produce them at a lower price. We changed the production method to multi-forming and handled everything from mold design for the forming machines to mass production at Kokkō Spring Industry. As a result, by switching to multi-forming, we reduced material waste and achieved a cost reduction of approximately 30%. [Case Overview] ■ Customer's industry: Electrical equipment manufacturer ■ Product consulted: Leaf springs (irregular thin leaf springs) ■ Technology/Method: Multi-forming *For more details, please refer to the PDF document or feel free to contact us.

• Spring

This is an introduction to a case where we successfully stabilized the quality of spring products and achieved significant cost reductions for a medical device manufacturer. At Kunimitsu Spring Industry's Production Technology Department, we developed a dedicated load full inspection machine. We handled everything from the production to the inspection of spring products. As a result, we were able to supply products with stable quality, leading to increased work efficiency. Additionally, we achieved a cost reduction of 40% and a 30% reduction in delivery time. [Case Overview] ■ Customer's Industry: Medical Device Manufacturer ■ Product Consulted: Wire Springs (Compression Coil Springs) ■ Technology/Method: Coiling Machine *For more details, please refer to the PDF document or feel free to contact us.

• Spring
• Inductor Coil

This is an introduction to a case study that solved the problem of springs used by an electrical equipment manufacturer being prone to rust, which could affect their products. To obtain the appropriate spring strength, calculations and adjustments to the shape were made. A prototype was then produced, and the customer conducted tests and evaluations, resulting in favorable outcomes. As a result, the springs became less prone to rust, and the product's lifespan improved. The results met expectations. [Case Details] ■ Customer's Industry: Electrical Equipment Manufacturer ■ Product in Question: Wire Springs (Compression Coil Springs) ■ Technology/Method: Coiling Machine *For more details, please refer to the PDF document or feel free to contact us.

• Spring
• Inductor Coil

This is an introduction to a case study that solved the issue of a pneumatic equipment manufacturer wanting to shorten the lead time of their current products made by other companies. After conducting detailed interviews, we formulated a hypothesis to reduce some of the processes. As confirmed, there was no change in the product specifications, so we cut the work processes and mass-produced the items at Kokko Spring Industry. As a result, we achieved a 30% reduction in delivery time compared to before. Furthermore, we successfully reduced costs by 15%. 【Case Details】 ■ Customer's Industry: Pneumatic Equipment Manufacturer ■ Product in Question: Compression Springs ■ Technology/Method: Coiling Machine *For more details, please refer to the PDF document or feel free to contact us.

• Inductor Coil
• Pneumatic Equipment

We provide various high-precision "leaf springs" such as "wave washers" and "balance pieces." We can achieve high-speed production of a wide variety of products, including complex-shaped thin leaf springs, using various multi-forming machines. We also accommodate conditions such as durability and heat resistance. 【Production Examples】 ■ Wave Washers ■ Balance Pieces ■ Special-Shaped Thin Leaf Springs ■ Sheet Material Formed Products *For more details, please download the PDF or feel free to contact us.

• Spring
• Contract manufacturing
• Processing Contract