vierintäpinnoilla

Vierintäpinnoilla is a Finnish term that translates to "rolling surfaces" or "rolling elements" in English. It refers to the components within a bearing that facilitate rotational movement by reducing friction. These rolling surfaces are typically made of hardened steel and are designed to withstand significant loads and stresses.

The most common types of rolling surfaces are balls and rollers. Ball bearings utilize spherical balls, while roller bearings employ cylindrical, tapered, spherical, or needle-shaped rollers. The choice between balls and rollers depends on the specific application, including the type and magnitude of the load, the required speed, and the operating environment. Balls are generally preferred for high-speed applications and situations where misalignment is a concern, while rollers can handle heavier radial loads.

The smooth, hardened surfaces of these rolling elements allow them to move with minimal resistance between the inner and outer races of a bearing. This rolling action drastically reduces the friction experienced compared to sliding friction, enabling efficient power transmission and extending the lifespan of machinery. Proper lubrication is crucial for the performance and longevity of vierintäpinnoilla, as it forms a protective film that prevents direct metal-to-metal contact and dissipates heat generated by the rolling motion.