SCREW DRIVES GT, MICRONLine®, KOKON® SCREW ... - BIBUS

Screw DrivesBall Screw Drives KGTSizing and selectionExample calculation for a ball screw driveGiven: Ball screw drive KGT 5010Length L = 2000 mmInstallation case 3Maximum operating speed: n max = 3000 [1/min]! ?Required: Is the operating speed uncritical?What is the permissible axial force?What is the maximum deflection?Ball Screw Drives KGTMaximum persmissible speed n zulfrom (V)n zul = 0.8 . n kr. fkr = 0.8 . 1290 1/min . 1.47 = 1517 1/min➔ n zul = 1517 1/min (< limit speed!)Theoretical critical speed n kr = 1290 rpm➔ from diagram “Theoretical critical speed”from (VI)F zul = 0.8 . F k. fk = 0.8 . 95 kN . 2.05 = 156 kN➔ F zul = 153 kN (max. static load rating C O !)Theoretical critical buckling force F k = 95 kN➔ from diagram “Theoretical critical buckling force”from (VII) w KGS. LKGS 13.50 kg/m . 2 mf max = f B . 0.061 . = 0.41 . 0.061 .l Y 18.566 cm 4f max = 0.036 mmWeight w KGS = 13.50 kg/mPlanar moment of inertia l Y = 18.566 cm 4➔ from table page 11Result: NoteThe selected screw drive may be operated only at n max = 1517 rpm.It can be statically loaded with a maximum axial force of 150 kN,and when installed horizontally has a maximum deflection of 0.036 mm.the dynamic load rating !Tel : +49 (0) 7157-124- 0 Web site : www.DanaherMotion.net 31