Bearings are an indispensable component in the work of milling machine spindles. Only through close cooperation of bearings can various high-precision and high-speed work be completed. The working requirements of milling machines are different, and the types of suitable bearings are also quite different. Only by using suitable bearings can the milling machine equipment work stably. So how to choose the right milling machine spindle bearings? Please continue reading this guide.
Milling Machine Spindle Bearing Selection Method and Key Points
1. Understand the design speed and maximum load requirements of milling machine spindle bearings. The performance of the selected bearings must be able to meet the load capacity and speed requirements. If the requirements are not met, it is easy to be damaged.
2. The milling machine spindle sometimes needs to complete some high-precision operations, which requires the accuracy level of the bearings used to meet the requirements, such as P5, P4, and even the national standard P2. The accuracy reaches the processing accuracy before it can be guaranteed. Of course, the strength of different bearing manufacturers is different, and the product processing accuracy varies greatly. High-precision bearings must be completed by a strong manufacturer such as VKUKEN.
3. Determine the working size of the spindle bearing. The spindle diameter, installation space, etc. have strict requirements for the bearing size. The inner diameter, outer diameter, width, weight and other parameters of the bearing must be carefully calculated. Otherwise, if the purchased one is too large or too small, it cannot be used normally.
4. You must also consider the working environment of the milling machine spindle bearing, such as temperature, humidity, corrosiveness, etc., to ensure that the selected bearing can adapt to these conditions.
5. Lubrication method. Common lubrication methods include grease lubrication and oil lubrication. Different milling machine equipment uses different lubrication methods, and the performance of the bearing is also different.
Types of milling machine spindle bearings
1. Angular contact ball bearings
Angular contact ball bearings are a type of bearing commonly used in milling machine spindles, which can withstand radial loads and axial loads. Angular contact ball bearings have single-row and double-row structures. In comparison, double-row angular contact ball bearings can withstand larger radial loads, have stronger speed and rigidity, and are generally used on precision milling machine spindles. Common angular contact ball bearing models include 70 series, 72 series, 73 series, etc. You can choose the appropriate milling machine spindle bearing model according to the performance requirements of the milling machine spindle.
2. Tapered roller bearings
Tapered roller bearings are suitable for use on high-speed, high-precision milling machine spindles. Its inner and outer ring raceways are both conical surfaces and can withstand large radial and axial loads. This type of bearing can ensure the spindle speed and position accuracy. Common models include 3200 series and 30200 series, which are also widely used in milling machine equipment.
Conclusion
The spindle bearing of a milling machine is the heart of the milling machine. Its importance is self-evident. As a manufacturer or user of milling machine equipment, if you are confused about the choice of bearings, it is recommended to consult a professional bearing application engineer before making a choice, listen to professional advice, and comprehensively consider factors such as the price, quality, life, and maintenance cost of the bearing before choosing the most suitable bearing.
