Stay Precision machining Field ， Whether or not Aluminum processing ， Still Machining stainless steel， All need horizontal lathe 。 Today ， Let's learn about the basic structure of its main shaft system 。

　　 Chart 2-2 Shown as CA6140 Spindle system of horizontal lathe ， Before spindle 、 Double row cylindrical roller bearings are installed at the rear support 5 And 8， Intermediate support （ Chart Not drawn yet ） It is also equipped with single row radial short cylindrical roller bearing E32216 For radial force 。 Installed at the front support 60° Angular contact double row radial thrust bearing 6 For bearing left 、 Axial force in right two directions 。

　　 The preload of the front bearing consists of 3、13 And 7 Adjust ， Rear bearing components 10、9 Adjust ， By component 11 Locking 。 The spindle is a hollow stepped shaft ， The inner hole can supply long bar And Pneumatic 、 The transmission rod of hydraulic clamping drive device passes through 。 The front end is precision Morse taper hole ， For mounting the center or spindle 、 Chuck 、 Dial, etc. 。

　　 Stay Precision machining In the process of ， The spindle speed range is 10-1400r/min。 The shafting is supported in three places ， Increased rigidity And Vibration resistance ， The use of cylindrical roller shafting improves the bearing capacity 。 The rotation accuracy of shafting depends on the accuracy of bearing And Preload Adjust 。