Current Precision machining plant ， Majority Precision machining Sliding shafting is used 。 Today ， Combination of small editors Precision machining plant Let's talk about the reality of ：

　　 Chart 2-18 The sliding shafting of the circular engraver shown is QGG405 The sliding shafting of the photoelectric circular marking machine 。 Principal axis 1 Shaft sleeve 2 And 4 The fit clearance of 0.001~0.002mm Within ， Principal axis And Set Of Roundness 、 The conicity error is within 0.001mm Within ， Principal axis Upper 、 The coaxiality error of the lower neck is 0.005mm， Roughness is Ra0.025um。 Axle sleeve 2 And 4 Pressing in shell 3 Of 。

　　 Interference volume is 0.006～0.009um， Shell 3 Of Within Hole And Outer circle Of Mean shape error Stay 0.001mm Within 。 The rotation accuracy of the shafting is 0.05～0.07um， The marking accuracy can be up to ＋－0.2”。

　　 Chart 2-19 The conical sliding shafting of the circular cutting machine is shown 。 Stay Precision machining In ， Axis And Axle sleeve Between Of Clearance by adjusting screw 3 Adjustment in 0.0１mm Within And uninstall. Of Effect ， Cone angle 2a Stay 4°～15° Choose between ，4° Mostly used in precision shafting 。 Axis length is L， Requirement L＞R（R Marking machine Of Arm length ）。 The Axis System accuracy depends on Cone Axis Neck And Cone Axle sleeve Hole Of Manufacturing accuracy ， If manufactured Of Precision control 0.001mm Within ， Then ratio Chart 2-18 Shown Axis System Of High rotation accuracy 。 Of course ， Higher rotation accuracy ， Precision machining plant The more I love it. 。