Precision Bearings configuration issues

   For some high-precision bearings, its configuration requirements are very high, today we have to introduce a configuration problem on precision bearings.
Traditional applications of precision machine tool precision spindle bearings are, depending on the machine spindle processes have different requirements. In general, the lathe spindle is used at lower speeds and larger cutting metal cutting load. This type of transmission of the driving torque of the spindle usually through the pulley or gear. This means that the load on the drive end of the spindle is also quite large.Such applications of the speed is not too high, and more important parameter is the stiffness and load-carrying capacity. A very common method is to install a working end of the spindle-row cylindrical roller bearings and a double row angular contact thrust ball bearings, while at the driving end of the spindle using a double row cylindrical roller bearings. This configuration ensures a long working life and excellent rigidity, to produce high quality parts. Moreover, the agricultural bearings

 can be operated stably in terms of kinematics is concerned, because the two types of bearings (radial and axial) were carrying the load applied to the spindle (in fact, in order to prevent angular contact thrust ball bearing bearer path to the load, the outer diameter with special tolerances foreign ensure it will never be able to contact bearing).
  In the design of these types of spindles (which is usually applied to the load is heavy), a rule of thumb about the axis of the bearing is located where the distance between the centers of the front and rear support bearings for the 3-3.5 times the inner diameter.In need higher speeds (ie, high-speed machining centers or internal grinding), you need to find a different bearing solutions. Obviously, you need to make some sacrifices in terms of stiffness and load capacity in these cases. High-speed applications usually by direct-motor and / or direct drive spindle coupling (the so-called motor spindle).