What are the types of CNC machine tool spindle bearings?

CNC machine tool spindle bearings play a vital role in the operation of CNC machine tools in practical applications, and are very core components of machine tools and turntables. So what kinds of bearings do we have in the actual application of CNC machine tool spindle bearings? The well-known CNC machine tool spindle bearings can be mainly divided into precision angular contact ball bearings, cylindrical roller bearings and tapered roller bearings. The first is precision angular contact ball bearings; precision angular contact ball bearings are the most common in CNC machine tool applications, angular contact ball bearings are a point contact, and its flipping body is a ball (different from the line contact of a roller bearing), Therefore, it can bring a higher speed ratio, smaller calorific value and better rotational precision. There are some particularly fast CNC machine tool spindle bearing application scenarios, and composite bearings with ceramic balls will also be used. Compared with the traditional fully hardened bearing steel balls, ceramic ball bearings rely on its ceramic ball raw materials, so that they have the characteristics of high bending stiffness, high-speed rotation, heat resistance, and long service life, and then meet the needs of high-end users for CNC lathe bearing products. requirements. The contact angles of precision angular contact ball bearings are mostly 15 and 25; the contact angle of 15 has a very high speed ratio, and the contact angle of 25 has a high axial load capacity. Because the selection of preload is particularly relevant to the application of high-precision angular contact ball bearings, in places with high installation and high rigidity, small, medium or super-heavy bearing preloads are generally used; while for some high-speed rotation, high For precision applications, in the initial model selection of bearings, care must be taken to select the appropriate preload. Preload is generally divided into three types: light, medium and small, and super heavy. Generally, light preload is more common. In order to better facilitate the user's application, as a professional CNC machine tool spindle bearing manufacturer, it is widely used to grind the bearing inner hole and preload the bearing, which is what we generally refer to as the all-round matching high-precision angular contact ball bearing. These bearings eliminate the need for preload adjustments by the customer, thereby saving installation operations. The second type is cylindrical roller bearings; cylindrical roller bearings and precision angular contact ball bearings are generally used together or with thrust bearings. This kind of CNC machine tool spindle bearings can carry large axial loads and allow high speed ratio. The multi-row roller bearings in the bearing are arranged in a cross-type manner, and the fluctuation frequency during rotation is greatly improved compared with the row-type bearings, and the vibration amplitude is reduced by 60% to 70%. As a professional CNC machine tool spindle bearing manufacturer, the internal structure of the cylindrical roller bearings we produce adopts rollers arranged in parallel, and spacers or spacers are installed between the rollers to prevent the rollers from tilting or the rollers from interacting with each other. Friction effectively prevents the increase of rotational torque, and has the characteristics of fast speed, low noise, high precision, long life, high temperature resistance, and small friction coefficient. The third type is tapered roller bearings; in some places where CNC machine tools are used with heavy loads and certain speed requirements, such as rough grinding of steel castings, threading machines for oil pipelines, super-heavy CNC lathes, etc., it is generally more suitable Use tapered roller bearings. In the application of CNC machine tool spindle bearings, as a professional manufacturer for 33 years, it mainly produces precision angular contact ball bearings and cylindrical roller bearings in the application of CNC machine tools. The design is optimized. We have an elite R&D team and support customization! (/skjczz.html)

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