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

Trapezoidal Screw Drives TGTScrew DrivesSizing and selectionDeflection of the screw under its own weightEven in the case of correctly installed screw drives where the resulting radialforces are absorbed by external guides, the weight of the unsupportedscrew itself may lead to deflection. The formula below allows you to calculatethe maximum deflection of the screw.Maximum deflection of screw(XIV)w .TGS LTGSf max = f . B 0.061 .l Yf B Correction factor considering the bearing support of the screw ➔ see tablel Y Planar moment of inertia [mm 4 ] ➔ see table page 35L TGS Unsupported screw length [mm]Weight [kg/m]w TGSTheoretical maximum deflection of screwBearing supportTypical values of correction factor f B corresponding to the usual cases of installation for standardscrew bearings.Maximum deflection of screw f maxf B = 9.57f B = 0.41Unsupported screw length L TGSCase 1 Case 2f B = 1Case 3 Case 4f B = 0.2050 Tel : +49 (0) 7157-124- 0 Web site : www.DanaherMotion.net