Spindle bearing
The spindle bearing is one of the most important components of a tool-guiding spindle. This is because the bearing of the main spindle must be able to absorb and transmit forces even more than the bearing of the feed spindle. This is precisely why the demands placed on the spindle bearings for tool spindles are so high. The desired performance profile of a spindle bearing arrangement is as follows:
- It must guarantee the highest possible accuracy
- It must demonstrate a high level of performance over as long a period as possible
- This makes it an important component in keeping the manufacturing and operating costs for products manufactured on a tool spindle as low as possible
Your spindle storage system will also meet these requirements
The above requirements are not only diverse - they are also designed with such clarity that there is little room for tolerances . For this reason, it is important that you can rely 100 percent on the quality and performance of the spindle bearings in your machine. To ensure this, there are various quality factors that characterize high-quality spindle bearings. For you, these are a kind of guarantee for the reliability of your machine.
One of the most important points here is certainly the fact that the spindle bearings are positioned precisely with low feed forces. The resulting very low friction also ensures very little jerking and thus ensures reliable and, above all, precise work of the clamped tools.
The fact that spindle bearings themselves should only be produced from selected, high-quality materials is primarily due to the desired service life and reliability of this important component of your tool spindle. After all, the accuracy of your machine's work must of course be maintained over its entire service life. The very low wear on the spindle bearings generally speaks for the quality of these components.
The result of a tool spindle's work should be exact and comparable. This requires very little change in position as far as the guided components are concerned. This is ensured by high rigidity and a high degree of freedom from play.
Last but not least, excellent spindle bearings arecharacterized bygood damping in the direction of movement and support. This avoids the tendency of the guided tools to chatter, which is unavoidable with particularly inexpensive and rather inferior tool spindles.
What exactly is a spindle bearing?
The spindle bearings are single-row angular contact ball bearings that stand out due to their high degree of precision. These ball bearings are designed in such a way that they can simultaneously absorb axial and radial loads and process them accordingly or transfer them to the respective tool in the spindle.
Which spindle bearing is best suited to your spindle depends on various factors. For example, the speed that you want or need to achieve with your tool spindle. The question of the specific axial load or radial load also has an effect on which spindle bearing is ultimately the right one for you.
To avoid risking rapid wear or inaccurate operation of your spindle as a whole by selecting an unsuitable spindle bearing, you should definitely seek advice from an expert on this point. We will of course be happy to provide you with a free consultation - why not make an appointment directly?
These types of spindle bearings are available
There are various criteria for classifying spindle bearings on the market. One is the physical principle that applies to the spindle in question. Another important point is the type of lubricating film structure and the lubricant itself. The force expansion is also an important aspect here. The following distinctions are made between spindle bearing supports:
- Aerostatic spindle bearings
- Electromagnetic spindle bearings
- Rolling bearings
- Hydrodynamic spindle bearings
- Hydrostatic spindle bearings
The most frequently selected bearing principle for spindle bearings is the roller bearing. Here, international standardization ensures a high degree of safety in terms of the quality of the respective bearing.
In this context, it is interesting to note that the spindle bearings were specially modified and developed to meet the requirements of a highly developed tool spindle. There is a simple reason for this - hardly any other bearing system met the high demands placed on the individual components of a tool spindle right from the start. Especially the points:
- High running accuracy
- Stiffness
- Almost absolute freedom of movement
- Low frictional torque
are generally unique in terms of quality compared to other bearing systems.
What happens if the spindle bearing is defective?
A defective spindle bearing inevitably has a direct impact on the quality of the results of the tool spindle. The tolerances in the processing of axial and radial forces become ever greater, resulting in a sharp drop in the accuracy of your machine's work. However, it is not only the results of your tool spindle's work that suffer from the declining quality of a defective spindle bearing.
The tool itself also suffers from a defective spindle bearing. The surface quality of affected tools quickly deteriorates. The service life of the tools is also affected.
Did you know?
It is interesting to note that you can have defective spindle bearings chrome-plated and thus restore them to their former quality in many cases.