MOTORIZED OPERATION
Motors can be used for all jacks in the series. As a standard production, for the IEC unified motors, it is possible to connect them directly to screw jacks having a size between 204 and 8010. Special flanges can be made for hydraulic, pneumatic, brushless motors, as well as for direct current motors, permanent magnet motors, stepper motors and other special motors. In the case where it is not possible to motorize a screw jack directly, a connection by means of a bell house and a joint can be foreseen. In special cases it is also possible to motorize size 183 and the sizes over 8010. The power curves determine, in case of unit service factors and for every single screw jack, the input power according to the size, the ratio, the dynamic load and the linear speed.

MANUAL OPERATION
All screw jacks in the series can be manually operated. Obviously, greater loads can be manually handled by applying further reductions to the screw jack or by increasing the radius of the handwheel.

ROTATION DIRECTIONS
The rotation directions and the respective linear movements are showed in the drawings below. In standard conditions UNIMEC supplies screw jacks equipped with right handed worm screw, to which the movements illustrated in drawings 1 and 2 correspond. Upon request it is possible to have a left-handed worm screw, which the movements illustrated in drawings 3 and 4 correspond to. The combinations between threaded spindles and left-handed or right-handed worm screw, lead to the four combinations listed in the table below. We remind, that UNIMEC’s standard production does not include motorized left-handed worm screw.

1

2

3

4