We aim to be a sustainable global company that pioneers the future of motorization.


of GMB

GMB conducts many manufacturing processes in-house, and leverages the experience, expertise, production technology, and research and development accumulated therein to produce high-performance and economically superior universal joints for all types of environments.

The spider, which serves as the shaft, and the bearing case, which acts as the outer ring, are formed through hot or cold forging. After forming, they undergo precision machining that can accommodate complex shapes, and then go through optimal carburizing and hardening processes to ensure high strength and wear resistance. The components are then finished with precision grinding.
Oil seals and dust covers play a vital role in preventing foreign matter from entering inside the bearings. Depending on the operating conditions, such as whether the specifications are for high or cold climates and temperatures, we select the optimal shapes and materials to suit the usage environment.
GMB provides only the most crucial component to the module, the universal joint, rather than the entire module, which consists of drive shafts or propeller shafts. This approach allows us to be flexible in adapting to various shaft sizes and usage conditions, contributing to our success in the OEM market. We are also expanding our brand in the repair market, with a wide range of product offerings.

Tensioner idler bearings manufactured by GMB

Tensioner idler bearings manufactured by GMB

A significant reduction in costs was achieved by
introducing hard turning technology.

At GMB, we have introduced a hard turning technology, which is seldomly seen in Japan or overseas, for our universal joint components.
This allows us to produce products without reducing the traditional grinding processes.

Flow diagram with hard turning technology introduced

In this way, the introduction of hard turning technology not only reduces equipment costs and required facility space but also shortens lead times, resulting in significant cost benefits. GMB reflects these cost benefits in its product prices, passing the advantages on to its customers.
The ability to streamline equipment and processes also significantly reduces power consumption. While the actual savings depend on the nature of the components and production volumes, preliminary estimates suggest around a 35% reduction in electricity costs compared to traditional methods.
GMB has embraced a new concept of "The Earth's Success is Our Future" and is actively exploring environmentally conscious production methods from various perspectives. The implementation of hard turning technology is seen as a significant step towards realizing GMB's conceptual commitment to Earth-friendly practices.


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Constant velocity joints (CV joints) allow for precise and variable adjustment of alignment and speed between a vehicle's wheels and the transmission.
As a crucial component of the power transmission system, they are assembled onto the drive shaft. CV joints facilitate the transmission of engine power from the gearbox to the wheels, accommodating both angular and axial movements within a defined range.

GMB's CV joints are manufactured using high-strength materials and precision machining, ensuring a long lifespan for the components and enabling smooth driving. These CV joints are adopted by many automotive manufacturers as OEM parts. Currently, GMB is also producing them for electric vehicles, and is promoting the ongoing development of CV joint components with a focus on material selection for weight reduction.

While addressing various quality issues that arise throughout the production process, GMB has systematically documented and stored all relevant and related data. This enables the company to formulate effective countermeasures during the prototype stage by drawing on its past experiences with a diverse range of quality issues. Consequently, GMB is now able to develop even higher performance CV joint components with greater efficiency.
In fact, there have been minimal quality issues that have occurred after moving from prototyping to mass production. The ability to leverage its past experiences and contribute to new developments is one of GMB's greatest strengths.
To enable smooth driving, GMB employs the barrel finishing method to ensure even a minimal generation of burrs does not occur.