Our Product

Automotive Parts

Chassis Frame

Press Kogyo produces chassis frames for vehicles ranging from heavy and light trucks to RVs and pickups, then supplies them to customers (truck manufacturers) in every region. Chassis frames for heavy and medium duty trucks are produced at the Utsunomiya, Kawasaki, Fujisawa, and Saitama Plants, while chassis frames for light duty trucks, RVs, and pickups are produced at the Fujisawa and Onomichi Plants.

What's frame

This component is part of the skeleton and is located under the cargo bed. It supports the payload and large portions of its components are formed steel parts.
The length of chassis frames range from approximately 4,000 mm for light duty trucks, RVs, and pickups, to 12,000 mm for long heavy duty trucks. Weights range from around 200 kg to over 1,000 kg, and we support a wide variety of specifications according to vehicle types.


Chassis frames not only support payload, they absorb receive from the road load when in motion through a vehicle’s suspension. A range of parts are mounted on chassis frames, including the drivetrain, as well as the engine, transmission, and other chassis components, the cab, steering system, fuel tank, and battery. Since the chassis frame is a non-replaceable part, it must be strong, durable, and be able operate for many years under severe conditions without causing any issues. In addition, the rigidity of the frame significantly affects driving stability and comfort. There are other requirements for the chassis frame that include ease of installation for parts and accessories, like a refrigeration unit, mixer, or tank mounted on the chassis, as well as the need for light weight to improve fuel efficiency and payload.


A typical ladder chassis frame combines multiple cross members attached to the left and right side members, and includes other components, such as brackets for mounting additional parts, gussets, and stiffeners for reinforcement.
The shape of the front side member differs depending on constraints of the layout of the components, such as the cab, engine, and suspension. The chassis frame generally has an open U-shaped cross-section, though light duty trucks and RVs may have a closed square-shaped cross-section. The cross members connect the left and right side members, and support the engine, radiator, and other systems. For that reason, they are shaped differently depending on their use, ranging from U, “alligator,” and “hat” to pipe shapes. Generally, rivets are used to fasten side members, while welding is used for frames with closed cross-sections.


Press Kogyo produces axles for different types of vehicles from heavy and light duty trucks to RVs and pickups, then supplies them to customers (truck manufacturers) in every region. We command around 70% of the market share for axles for the four major truck manufacturers. Axles for heavy and medium duty trucks are produced at the Utsunomiya, Kawasaki, Fujisawa and Saitama Plants, while axles for light duty trucks, RVs, and pickup trucks are produced at the Fujisawa and Onomichi Plants.

What's Axle

The axle is located under the frame. In light and medium duty trucks, there are generally two axles due to the low gross vehicle weight. Heavy duty trucks, on the other hand, have three axles, since gross vehicle weight often exceeds 16 tons.
Further, some low-deck vehicles with low height cargo bed have four axles that work in combination with small-diameter wheels.


In most trucks, the front axle takes the weight of the vehicle and is used for steering. In some all-wheel-drive vehicles, the front axle also sends power to the front wheels.
The rear axle is divided into the drive axle, which takes the weight of the vehicle and transmits power to the wheels, and the dead axle, which helps take the weight of the vehicle.
In addition, parts such as brakes and suspension can be mounted on the axle case.


A standard drive axle has a banjo type: the structure that includes the differential carrier that is mounted onto the axle case with bolts.
Hubs are used for attaching the brakes and wheels on both sides of the axle case. The hub and the differential gear are connected by the axle shaft inside the axle case, and power is sent from the shaft to the hub assembly.

Construction Machinery Parts

Cabins for construction machinery are assembled using parts that make full use of automobile assembly technology and special press forming technology. (variant shaped steel pipes)

What's Cabin for construction machinery

The cabin is where the operator of the construction machinery sits (shown in the red box in the diagram).
The cabin, sometimes called the “face” of the construction machinery, has unique characteristics depending on the manufacturer. Cabins differ based on the requirements, such as the class of machinery and use, for instance, demolition or forestry.



Construction machinery cabins are designed with the comfort of the operator in mind.
Visibility looking forward is the chief requirement when excavating and visibility looking up is critical for demolishing buildings and forestry.
For these reasons, we make the window glass as large as possible and the cabin pillars as thin as possible.


In recent years, demand for stronger cabins has increased to safeguard operators from unexpected life-threatening accidents while on the job.
Press Kogyo employs variant shaped steel pipes in the cabin pillars. Bending and processing these pipes is handled in-house. Using these pipes makes it possible to create cabins with exceptional designs and strength.


The front window glass and skylight can be kept open, improving convenience when working by increasing ventilation and providing a sense of space.
The front window can be opened and closed easily using an assist and can be locked with one touch.

Dies and Equipment

Using our press formation and welding/assembly technology, we provide high-performance, high-quality dies and automated equipment that meet our customers' needs.