Servomech S.p.A.
01.05.TR.E - Rev. 02 DD (M/Y) 12/19
30
6.12
Installation of screw jack lifting system
The installation of many screw jacks for SYNCHRONIZED lifting movement requires particular attention on
two different factors:
alignment of load support points: screw end in case of travelling acme screw (Mod.A), bronze nut in
case of travelling nut (Mod.B);
use of connecting shafts and couplings with high torsional stiffness, to assure a perfect synchronism
of all lifting points.
drive shafts have to be aligned and supported so that any vibration or dangerous bending of the
transmission should not occur.
6.13
Installation of fitting elements on threaded end (Mod.A)
To install a mounting element on the threaded end (NF), fix the acme screw shaft with a clamp to
counterhold the locking torque.
In case of screw jack equipped with AR (anti-rotation) device: DO NOT TRANSFER ANY TORQUE TO
THE ACME SCREW.
WARNING: in case of torque transfer into the acme screw with AR device, the internal mechanical
components can be damaged.
Fix the threaded element with Loctite 270.
To unmount the element, heat the threaded area to unlock it.
Unscrew the fitting element counterholding the torque on the acme screw shaft.
