Fitness equipment generally has a design service life of more than 5 years, and the maintenance cost is relatively high. Therefore, the service life of deep - groove ball bearings, thin - wall bearings and miniature bearings used in fitness equipment is also required to be no less than 5 years. Considering that these bearings bear complex forces during the operation of fitness equipment, such as the impact and vibration when fitness equipment like treadmills are running at high speed and strength training equipment is under heavy load, the bearings need to withstand both impact and relatively large loads, which puts forward very high requirements for the mechanical properties of the bearing materials.

Deep - groove ball bearings are widely used in the main transmission systems of fitness equipment, such as the rollers of treadmills and the rotating shafts of exercise bikes. For example, in a treadmill, deep - groove ball bearings support the main roller, ensuring its smooth rotation. The material of the bearing rings is often selected as high - quality bearing steel, and through heat treatment processes such as quenching and tempering, the hardness of the ring matrix can reach an appropriate range, and the raceway surface is quenched to achieve higher hardness, so that it can withstand impact without plastic deformation and increase contact fatigue life, thus meeting the 5 - year service life requirement of fitness equipment.

Thin - wall bearings are mainly used in precision parts of fitness equipment, such as the adjustment mechanisms of multi - function fitness machines and the rotating parts of some small fitness devices. In the adjustment mechanism of a multi - function fitness machine, thin - wall bearings, with their small friction coefficient and compact structure, ensure the smooth adjustment of the machine and improve the user experience.

Miniature bearings are applied in the electronic control systems and small - sized moving parts of fitness equipment, such as the motors of fitness equipment display screens, the adjustment motors of seat positions in some advanced fitness equipment, and the small transmission components of smart fitness devices. In the motor of a fitness equipment display screen, miniature bearings support the motor rotor, making the display screen adjust or rotate smoothly while reducing motor noise. In smart fitness devices, miniature bearings are also used in some small transmission structures to ensure their reliable operation and support the intelligent functions of the fitness equipment.