NEW NEFF Worm Gear Screw Jacks

Type R:

means with a rotating screw.

Type N:

means an axial movement of the spindle via an external anti-rotation guide.

Type V:

Type V means an axial movement of the spindle via an anti-rotation guide (e.g. by feather key groove or square tube).

Ratio H (hohe Verfahrgeschwindigkeit)

Worm gear screw jacks with trapezoidal screws achieve a stroke of 1 mm per turn of the worm shaft. That means a linear speed of 1500 mm/min at 1500 1/min. Worm gear screw jacks with ball screws achieve – depending on size and pitch – a stroke of 6000 mm/min.

Ratio L (niedrige Verfahrgeschwindigkeit)

Worm gear screw jacks with trapezoidal screws achieve a stroke of 0,25 mm per turn of the worm shaft. That means a linear speed of 375 mm/min at 1500 1/min.

Please note that higher speeds of travel can be achieved with larger screw leads or multiple start screws. The worm gear screw jack´s maximum input speed of 3000 rpm must not be exceeded. The higher efficiency of the ball screw drive also permits a longer duty cycle.