Bearings make the difference

The bearings are the most sensitive and, at the same time, crucial component of any spindle. They determine how smoothly the spindle runs, what speeds are possible, and how long it operates reliably.

In practice, storage problems often develop gradually. Typical signs include:

• rising temperatures in the plant

• altered running noises

• increasing vibrations

• reduced tool life

A common issue is the bearing preload. If it's too high, unnecessary friction and heat are generated. If it's too low, stiffness is lacking and the spindle runs unevenly. Both directly affect machining quality.

The choice of storage type also plays a major role:

• Hybrid bearings are designed for high speeds.

• Steel bearings are more commonly used in more robust applications.

If the appropriate material is not chosen for the application, premature wear and tear will quickly occur.

Another critical factor is assembly. Even small errors such as:

• unclean passing surfaces

• incorrect pressing

• inaccurate alignment

This leads to stresses in the bearing assembly. These often only become noticeable later during operation, e.g., through unstable running behavior.

Practical experience clearly shows that many spindle failures originate in the bearing area – either due to wear, incorrect design or assembly errors.

Therefore, the following applies: The bearings determine not only the lifespan of the spindle, but also whether it remains consistently precise and stable in the process.