First consider the installation method. The installation methods of ball screws are free fixation, fixed support and fixed installation on both sides. The bearings used are different according to the installation method. One end is fixed and the other end is freely installed. Single-load deep groove ball bearings plus thrust ball bearings are generally fixed units with a pair of angular contact bearings and radial ball bearings at the support end. The force size in the vertical direction determines whether a thrust ball bearing is used.
Consider the use of the screw, the speed, transmission accuracy, maximum load, and the installation structure of the screw itself.
According to experience, at least one end of the screw must be an angular contact ball bearing. If the transmission accuracy requirement is very high, the bearings at both ends of the screw in domestic or Japanese and Korean machining centers are basically angular contact ball bearings.
Germany uses an angular contact ball bearing combination at one end and an ordinary deep groove ball bearing at the other end. Generally speaking, angular contact ball bearings are used for machine tools. If the screw diameter is relatively large and the transmission requirements are high, you can try others.
The ball screw support bearing on the machine tool is subjected to forces in two directions, one is axial force and the other is radial force, so it is best to use thrust angular contact ball bearings when choosing. As for the specific size, it depends on the specific debt movement. If the ball screw needs to be preloaded, that is, pre-stretched installation, angular contact ball bearings are required at both ends.
In other cases of use, various combinations have their own specific practical problems and specific situation analysis. The arrangement of contact bearings is arranged according to the direction of force. For example, in the case of pre-stretching, there are angular contact bearings at both ends. There is one that does not support the back line surface. There are other arrangements according to the size of the pre-tension.
The above is the answer to which bearing is suitable for the support seat of the ball screw? If you have any questions, please contact us.