Using machining in addition to combined hot/cold forging,
Yamaco strives to manufacture possibilities from the impossible.

Yamaco’s advantage is its combined forging technology, which combines and cold forging.
With the proven technology and ingenuity we have cultivated since our foundation,we change manufacturing mind-sets,
explore possibilities,and realize short delivery times and low costs, as well as high precision and high quality.

  • Combined hot/cold forging
    (precision forging)

Processing various materials into any shape
Pursuing new materials and realizing high-precision forming.

Working on advanced technology to pursue
the possibilities of precision forging.

Forging is synonymous with iron, and because of its high strength,
iron has been used for critical components such as drivetrains.

At Yamaco, we are focusing on a variety of innovative materials and working on next-generation technology development.
In hot forging, which involves the application of heat, we form complicated shapes by stamping, and by combining it with

cold forging for higher precision, we create products for which further processing is no longer required.

The composite technique for finishing products by taking full advantage of machining technology, in addition to forging,

is the true value of Yamaco.


  • 1.Aluminum forging technology

    The weight of every possible part needs to be reduced to improve the fuel efficiency of cars and other vehicles. Aluminum forging is especially suitable as an alternative for parts that require strength that are insufficient in casting, such as casting and die-casting materials.There are also materials that have the strength of iron, and the possibilities for hot forging of aluminum alloys continue to evolve.

  • 2.Titanium forging technology

    With its light weight, high strength, and high corrosion resistance, titanium is expected to play roles in the medical field, such as in artificial joints, and the airline industry, such as in engine disks and shafts for airplanes, which require high reliability. Yamaco was quick to recognize titanium as a new material and is working on hot, cold, and combined forging and machining of titanium.

  • 3.Cobarion(cobalt alloy) forging technology

    With a low nickel content, COBARION is a material suitable for medical and other products that come into contact with the human body. In addition to artificial bones, artificial joints, and other biomedical applications, it is also used for products in the realms of accessories such as luxury watches and rings because of its unique brilliance.*COBARION is a registered trademark of Iwate Industry Promotion Center.

  • 4.Inconel/Hastelloy forging technology

    Due to its excellent high temperature properties and erosion resistance, the nickel-based alloy Inconel can endure severe environments, such as those in aerospace, and is also used in industrial turbines and other applications. Because it is a difficult-to-machine material, it is a material for which processing should be eliminated with forging technology (hot and cold).

  • 5.CFRP forging technology (Patent Registered)

    CFRP (carbon fiber reinforced plastic) is a new material alternative for metallic materials. Because of its light weight and high strength, it is increasingly being adopted in a variety of products. Yamaco’s plastic forming technology enables the creation of complicated shapes.

  1. 1.Aluminum forging technology

    Reducing the weight of automotive components is an essential aspect in improving fuel economy. This makes aluminum particularly suitable as a substitute for casting or die-casting materials that would otherwise not be strong enough. Yamaco continues to look at the possibilities of hot forging aluminum alloy, which offers strength similar to that of iron.

  2. 2.Titanium forging technology

    Titanium is a lightweight, high-strengthmaterial with excellent corrosion resistance. This material is expected to continue being widely used in various fields, including in the medical field for artificial joints, and in the aviation field for aircraft engine disks and shafts requiring a high level of reliability. Recognizing this potential, Yamaco quickly adopted titanium as a new material and set about hot forging, cold forging, combined hot/cold forging, and machining titanium products.

  3. 3.Cobarion (cobalt alloy)forging technology

    Cobarion is an alloy with a low nickel count, making it suitable for medical-related products that come into contact with the human body. In addition to use in the biomedical field such as for artificial bones and joints, Cobarion can also be found in ornamental goods industries, giving a unique shine to luxury wristwatches and rings.

    ※“COBARION” is a registered trademark of Iwate Industry Promotion Center.
  4. 4.Inconel and Hastelloy forging technologies

    Inconel—a nickel-based alloy—is used for industrial turbines and other components used in harsh environments, such as in aerospace and space industries for its excellent high-temperature characteristics and resistance to erosion. The difficulty in cutting this alloy means it must be processed using forging technology (hot or cold) with less processing.

  5. 5.CFRP forging technology (Patent Registered)

    Carbon fiber reinforced plastic (CFRP) is a new material being used in place of metal materials. CFRP is being increasingly adopted for various products due to its light weight and high strength. Yamaco is able to adapt its plastic processing technology to produce CFRP products in a wide variety of complicated shapes.

Processing various materials into any shape
Production systems that enable the performance of design to forging +
machining in a consistent manner.

We design products with complicated shapes with 3D CAD/CAM and manufacture the dies in-house.
The processes from design to forging + machining are conducted in a streamlined
production system that enables the shortening of delivery times and reduction of costs
while also offering production that eliminates processing.

Yamaco production system

1. Design - 3D CAD/CAM

The latest die designs are created by specialized 3D CAD/CAM operators.Creation of efficient, high-quality forging dies is possible.Creation of 3D models to examine in advance is also possible.

2. Die manufacturing

Optimal high-speed machining data are created with 3D CAD/CAM to realize lean finishes that do not require precision polishing and enable short delivery times.

3. Cutting steel

Introduction of a cutting-edge high-speed automatic press cutting machine has improved forging yields with high-precision cutting. This has resulted in a reduction in total costs.

4. Heating steel

n hot forging, the cut material is heated to a temperature appropriate for it. This enables large materials to be formed into complicated shapes.

5. Hot forging

The shapes of products are formed with craftsmanship by striking materials heated to high temperatures with an air stamp hammer at high speeds. Products forged at high temperatures have dense structures, and their refined structures transform into properties with excellent strength.

6. Cold forging

Unlike hot forging, cold forging is conducted at temperatures close to the ambient temperature without heating the material. It features high precision and the ability to process products into dimensions and shapes close to those of finished products. Yamaco also excels at the technique of combined hot/cold forging.

7. Machining

We have equipment that can conduct not only forging and forming of materials but also high-precision shaving. We are also introducing rolling machines for mass production of special screws and other products. A major advantage of Yamaco is that it has a well-organized integrated production system up to machining in place.

8. Inspection and quality control

Through collaboration in design in addition to quality assurance, we work to improve consistency with 3D data and improve quality even before manufacturing.