Servomech S.p.A.
01.05.TR.E - Rev. 02 DD (M/Y) 12/19
28
Fit the screw jack to the plant in order to have ONLY AXIAL LOAD applied to the acme screw.
Check the axis of the acme screw and the screw jack fixing surface are perpendicular.
Check the supporting surfaces of the screw jack and the load are parallel.
In case of screw jack with TRUNNION MOUNT (SC): the front and rear pin must be PARALLEL.
Figure 6.16 – Mounting of Mod.A screw jack
RIGHT WORKING OF THE SCREW JACK AND PLANT CANNOT BE GUARANTED IF SIDE OR NOT AXIAL
LOAD ARE APPLIED TO THE ACME SCREW.
6.11
Travelling nut screw jack (Mod.B) installation
ALL MECHANICAL AND ELECTRICAL PROTECTION MUST BE INSTALLED AND ACTIVATED TO PREVENT
DAMAGE TO PERSONS OR PROPERTY.
Check that all plant fixing elements are well machined and cleaned, and that they fit the dimensions
of the screw jack fixing elements they have to be fixed to.
If the position of the acme nut have to be changed during installation, screw/unscrew the nut on the
acme screw.
To change the position of the acme nut without rotating it, rotate the input shaft of the screw jack
in proper direction (see Fig. 6.14).
For screw jacks with electric motor: power the motor with limited speed and torque values, in order
to avoid possible damages in case of a mechanical stop is reached.
In case of screw jack with bellow protection (B): DO NOT TWIST THE BELLOW.
ONLY FOR MA SCREW JACKS: the gearbox is oil lubricated; to avoid leakage during transport, the
BREATHER of the housing is replaced by a plug. The breather is supplied unmounted, with the screw
jack. AFTER INSTALLATION, PLEASE MOUNT THE BREATHER IN THE PROPER HOLE POSITION, AS
SHOWN IN FIG 2.1.
THE BREATHER HOLE POSITION IS INDICATED BY A MARKER.
THE BREATHER MUST ALWAYS BE IN UPPER POSITION.
