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4-Stage Telescope Actuator

Overview of 4-Stage Telescope Actuators

The 4-stage telescope actuator is a linear drive system that offers the perfect solution for very large travels with the smallest block dimension and thus also meets extraordinary requirements for space-saving design solutions in mechanical engineering.

The compact design elements from A.MANNESMANN combine the smallest possible structural dimensions with the greatest possible precision in performance.

Extreme space gain of up to 386% through 4-stage design

High Flexibility in Application

The linear actuator is a functional unit that can be used to implement demanding drive and positioning tasks. These tasks include displacement movements of components with complex, path-dependent processes as well as pressing and joining tasks with direct force-path evaluation.

Application Areas

The compact design of the 4-stage telescope actuators makes them extremely versatile in application. They allow for precise travel movements in machine tool precision as well as the implementation of high power transmission in press and jig construction.

The patented 4-stage telescope actuators are used in confined spaces due to their highly compact design. The high-precision positioning with telescope actuators occurs in machines with innovative technologies, such as additive manufacturing.

Telescope actuators for all installation positions

Advantages at a Glance

Economical advantages

  • Space gain through highly compact design
  • High long-term durability / service life
  • Economical standard designs or custom production
  • Allows for new types of mechanical engineering solutions in the smallest space
  • Excellent energy efficiency
  • Maximum long-term precision
  • Maximum possible machine availability
  • Perfected wear resistance due to nitrided spindle

Technical advantages

  • The smallest block dimensions
  • Highly-precise positioning capability
  • Exact travel movements
  • High rigidity
  • Very large travel (< 386 %)
  • Backlash-free, preloaded double nuts
  • Ball screw spindles with ground precision (accuracy IT 3)
  • Constant torque
  • Very low power losses
  • Uniformly low operating temperatures
  • Can be used in all installation positions
  • The highest power transmission rates
  • Extremely high degree of efficiency (up to 98%)

Detailed Structure

The 4-stage telescope actuator is marked as follows:

  • Telescopic ball screws
  • On both sides
  • Very compact design
  • Very high extension ratio
  • Very high effective pitch
  • Central torque introduction
  • Driven spindle
  • Driven nut

In the event of a space gain of up to 386 %, A.MANNESMANN actuators work with large axial load capacity with extreme precision. The patented 4-stage telescope actuators convert the central rotatory drive motion of the motor into two counter-running axial translational movements through two telescopic ball screws.

Our telescopic ball screws consist of two nested precision ball screws. The resulting partial movements split according to the thread pitches and occur absolutely synchronously.

High precision positioning and repeat accuracies are achieved through backlash-free, preloaded double nuts and ball screw spindles with ground precision in the accuracy quality IT 3.

High long-term durability is formed by perfect machining at A.MANNESMANN with high quality materials and heat treatment with the highest hardness.

The torque and the very high degree of efficiency of the telescopic levels of more than 80 % are constant across the entire travel. Only in this way do very low power losses and evenly low operating temperatures result.

Space gain through highly compact design

Highly Compact Unit

The telescope actuator is a ready-to-install machine assembly that is used to convert the driven rotational movement of a motor into a translatory linear movement. The telescopic multi-stage ability of the ball screw spindles makes it possible for the actuator to achieve a very large extension with the shortest-possible retracted block length. Complex machine movements can be numerically controlled and safely monitored with this very compact unit.

4-stage telescope actuator as an individual system

Horizontal or Vertical Installation Position with One-Way and Two-Way Load Bearing Capacity

Due to the little space it requires, the custom design telescope actuator from A.MANNESMANN is particularly well-suited for installation in very confined installation spaces. It is designed for high-precision, jerk-free positioning and movement operation in horizontal or vertical installation positions. The load bearing capacity can occur here one-way or two-way. The preloaded ball screw nuts guarantee freedom from backlash, even with very high tensile and compressive loads.

4-Stage Telescope Actuator as an Individual or Dual System

The AM telescope actuator can be designed as an individual or dual system. With a dual system, both parallel-arranged actuator systems are driven by a joint motor so that they extend and retract synchronously.

Actuators with High Dynamics and Precision

The technical basis of the telescope actuators is the ball screw from A.MANNESMANN, which has been tried and proven in machine tool building. That is why the high performance capacity and the long system durability are a matter of course with these actuators. The high load bearing capacity, the high positioning accuracy, the high dynamics (also at a low travel speed) and the long usage duration are important arguments for using A.MANNESMANN telescope actuators in addition to the compact design.

Our telescope actuator largely determines the performance and accuracy of modern machines. However, this high technical standard can only be met if it is used properly and correctly. It is only intended for industrial use in a complete machine. Other uses require express approval from A.MANNESMANN MASCHINENFABRIK GmbH.

4-stage AM telescope actuator as a dual system

Standards and Custom-Made Production

We provide 4-stage telescope actuators in two different standard sizes with different travel and axial forces in the tensile and compressive direction.

In addition, we produce your custom telescope actuators as special solutions with extensive accessories as part of our individual production. We precisely adapt the telescope actuators to your application conditions.


We will be happy to provide you with custom component drawings and dimensions of the 4-stage telescope actuators created according to your requirements after consultation for use in your CAD system to complete your planning documents.

Standard designs for 4-stage telescope actuators

Technical data


Standard 1

Standard 2

Installation size




Total pitch




Telescopic levels



Pitch per level




Ball size




Dynamic load rating




Static load rating




Max. dynamic axial load




Max. static axial load




Basic installation length




Max. travel




Min. installation length *




Max. installation length *




Extension ratio *



Positioning accuracy




Max. operating speed




Max. travel speed




* in relation to the max. travel

Your request to us

Use our professional competence to develop the best solution. Our engineers can be reached directly under

+49 2191 989-200

Online Inquiry for Telescope Actuators


In our Download Center, you will find all of the information that we provide you as files for downloading, arranged by category.

Downloads for this Product

Your request to us

Use our professional competence to develop the best solution. Our engineers can be reached directly under

+49 2191 989-200

Online Inquiry for Telescope Actuators