Vention's Tech Docs


Ball Screw Linear Actuator Datasheet

Vention's ball screw actuator datasheet complete with technical specifications and assembly instructions

Ball Screw Linear Actuator Datasheet main image.



Ball screw linear actuators are typically used for medium duty applications that require higher load capacity and precision. Supported at each end by an angular ball bearing embedded within a plate and linked by two Vention 45 x 90 mm extrusions, the assembly can accomodate any of Vention's Nema 34 stepper motors and comes in three different lengths.

Compatible Guides

The ball screw linear actuator can drive a variety of gantries that are in turn supported by both Eccentric and Concentric V-shaped rollers (MO-LM-001-0027/0028) or linear bearings on shafts (MO-LM-014-XXXX). Both configurations can be seen below.

Exhibit 1. Ball screw linear actuator shown with medium gantry (MO-LM-001-0030) and nylon V-shaped wheels Exhibit 2. Ball screw linear actuator shown with medium gantry (MO-LM-001-0030) and linear bearings and shafts


There are several application for ball screw linear actuators, including a High Precision UR10 7th Axis or a 2-Axis High Precision Linear Actuator.

Technical Specifications

Available Lengths
585mm, 855mm and 1530mm
Net displacements are 405mm, 675mm and 1350mm respectively
Displacement Ratio (mm/turn) 10
Linear Force / Torque Ratio (N/Nm) 565.5
Linear Force Capacity (N) 3700
Repeatability (mm) ±0.023 per 300mm length
Back Drive Resistance High
Motor Compatibility
NEMA 34, 14mm shaft
Sensor Compatibility
Compatible with all M18 sensors using the sensor bracket

The figure below demonstrates the linear force output in function of the linear speed of the ball screw linear actuator. This was calculated using Vention's NEMA 34 stepper motors.

Exhibit 3. Force in function of linear speed using Vention NEMA 34 stepper motors

Observing the figure above, the force sharply decreases as the linear velocity increases, making the ball screw ideal for high force, low speed applications.

Assembly Instructions

Support Plate

  1. Insert a 12mm ID angular ball bearing into the opening of a ball screw end plate.
  2. Secure the bearing in place using a ball screw end cap and 4 X M4 X 10mm screws
  3. Repeat steps 1 and 2 for the second side of the ball screw

Ball Nut Housing

  1. Slide the ball nut housing onto ballscrew up to the ball nut, making sure the ball nut is properly housed within its housing.
  2. Secure the ball nut to the housing using the 4 outside mounting holes and 4 x M5 x 20mm screws.


  1. Insert the ball screw ends through both bearings housed in the end plates
  2. Tap both holes at each ends of both 45 x 90mm extrusions (if required)
  3. With the ball screw properly inserted in both end bearings, secure each end plate to the extrusions using 4 X M8 X 55mm fasteners.

Motor Support

  1. Fasten the threaded end of the screw using the bearing locknut. The ball screw should now be contained and unable to move axially
  2. Insert the 3mm machine key into the ball screw's keyway.
  3. Insert the end of the ball screw into the smaller side of the 14mm to 10mm flexible shaft coupling. Secure the ball screw by tightening the small side clamping screw of the coupling
  4. Secure the motor mount to the ball screw end plate where the coupling is located using 4 X M8 X 20mm screws
  5. To mount one of Vention's 3 motors, simply insert the shaft through the mount and into the larger side of the coupling, properly aligning the machine key. Tighten the coupling and fasten the motor to the support block

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