Pyörälevyä

Pyörälevyä refers to a circular metal disc used in various mechanical applications. In the context of vehicles, it is commonly known as a brake disc or rotor. This component is a critical part of the braking system. When the brakes are applied, brake pads clamp onto the pyörälevyä, creating friction that slows down or stops the rotation of the wheel. The heat generated by this friction is dissipated by the design and material of the pyörälevyä.

Pyörälevyä can be made from various materials, with cast iron being the most common due to its cost-effectiveness and good friction properties. High-performance vehicles may use ceramic or carbon-ceramic composite discs for their lighter weight and superior heat resistance, which allows for more consistent braking under extreme conditions. The design of the pyörälevyä can also vary, with solid discs being simpler and used in many everyday vehicles, while vented or drilled discs offer improved cooling and performance, particularly for heavier loads or spirited driving.

Beyond automotive applications, pyörälevyä can also be found in other machinery, such as in industrial equipment or some types of agricultural machinery, where they serve a similar purpose of providing a surface for friction-based stopping or control mechanisms. The term itself is Finnish, directly translating to "wheel disc," indicating its primary form and function.