Cold Forging

Forging is a metalworking technique used to produce intricately-shaped parts with high rigidity and strength. Shimano is one of the pioneers of the cold-forging technique in Japan, having applied it in actual production since 1962. Development of this technique has enabled Shimano to produce precision parts for bicycles and fishing tackle in large quantities.
Forging shapes metal using compressive force, transforming the original material into a final, or very close to final, shape.
Forging techniques achieve high rigidity while reducing overall weight. This makes forging ideal for producing strong and lightweight bicycle parts and fishing tackle.
This technology, which involves no cutting work, to forge a high-precision gear with micron accuracy in a single process.
Achieving both the required precision and strength at the same time, this technology makes fishing reels highly durable and easy to handle.
Gluing parts made of different materials, such as aluminum, carbon, titanium or resin, can achieve higher hollow ratios and thinner wall structures than forging methods.
Gluing of different materials or curved surfaces requires highly precise application of adhesive.
Gluing increases the flexibility of product design and enables a lightweight 3D design with a robust volume.