Automobiles have three core functions: driving, cornering, and stopping. The engine delivers the power needed for driving, while the steering system handles the cornering and the brakes allow the car to stop. Being able to turn a car requires a functioning steering device. Within that steering device is a part that communicates the angle of the steering wheel to the rest of the system—and that part is called the pinion shaft. Pinion shafts are instantly recognizable by their twisted gear shape. AIKOKU ALPHA is celebrated as the first manufacturer to succeed in mass-producing a cold-formed pinion shaft while retaining superior gear precision.

Rack-and-pinion steering using a pinion shaft from AIKOKU ALPHA