There are several kinds of electric brake boosters, including the slide screw type, but the ball screw type is the most promising. One reason is the outstanding responsiveness it provides. Since there are tiny balls between the screw and the nut, the ball screw delivers very smooth motion. This allows the electric brake motor to activate instantly, resulting in exceptional responsiveness. Going forward, the market for electric brakes will have even higher requirements of electric brakes, and they will have to work effectively even in larger vehicles like pickups. The ball-screw-type system is considered optimal for larger vehicles as well, thanks to its superior responsiveness, which enables rapid, powerful braking.
In developing our ball screw unit, we put particular emphasis on reducing size and weight. NSK has been working on developing these ball screws for 10 years, leveraging feedback from various customers. During this process, the focus has always been on how to reduce the number of components while maintaining the same quality. Parts that are smaller and lighter are easier for customers to incorporate into their products. Thanks to the knowledge we amassed in this process, NSK's latest ball screw unit features an integrated ball screw support structural components, as well as an integrated support bearing. This makes the unit smaller and lighter than ever.