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Worm Gear Screw Jacks

Worm Gear Screw Jacks

  • Product introduction

Worm Gear Screw Jacks


The design

The cubic shape with integrated cooling fins permits a longer duty cycle,as the heat is dissipated more effectively,thus extending the service life of the lubricant.The surface coating simultaneously protects the jack against corrosion.

The housing material

The mechanical strength of the housing has been improved particularly at high temperature,through the use of spheroidal graphite iron instead of the former cast iron.This ensures greater reliability,even in tough service conditions.

The bearings

Taper roller bearings on the worm shaft and heavy-duty ball bearings as the main thrust bearings make it possible to move higher loads,increase the safety reserve and extend the service life.

The lubrication

The trapezoidal screw(version N)is greased by radial lubrication holes on the worm wheel.The resultant lower friction and temperature extends the service life,particularly when operating with longer stroke lengths.


The range of NEFF worm gear scres jacks comprises ten models with lifting capacities from 5 to 500 KN.All versions are designed for both tensile and compressive loads and will operate in any orientation or mounting position.

The meet the most demanding technical standards:

  •  Wide range of load capacities

  •  High and low speeds

  •  Cubic shape of the housing with predrilled flange bores  alloes ideal attachement of a motor,gearbox or rotary encoder

  • Stand mounting parts and end fittings

  • Easy synchronization of several worm gear jack units

  • With ball screw or trapezoidal screw,as required for the application concerned

  •  Extensive variations,also for special requirements( nut)

  •  Complete range of accessories


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