Ready-to-install Linear Motion Systems on a light blue background. Linear axes

Ready-to-install linear systems including guide and drive

  • Precise, compact, and high-performance
  • Easy integration into machine concepts
  • Extensive variety of variants
  • Quick configuration

Product comparison

Key technical data

Product
 Product abbreviation Product sizes
 Drive Type Dynamic load capacity Maximum speed Maximum acceleration Maximum travel distance* Repeatability
Compact modules CKK 70, 90, 110, 145, 200, 280 Ball screw drive up to 216,700 N up to
2.5 m/s 		up to
50 m/s² 		up to
4,590 mm
(with spindle support) 		± 0.005 mm
CKR 70, 90, 110, 145, 200, 280 Toothed belt drive up to 216,700 N up to
5 m/s 		up to
50 m/s² 		up to
9,710 mm 		± 0.05 mm
Linear modules MKK 40, 65, 80, 110, 140, 165 Ball screw drive up to 84,100 N up to
2.5 m/s 		up to
50 m/s² 		up to
4,960 mm
(with spindle support) 		± 0.005 mm
MKR 40, 65, 80, 110, 140, 145, 165 Toothed belt drive up to 84,100 N up to
5 m/s 		up to
50 m/s² 		up to
11,560 mm 		± 0.05 mm
MLR 80, 110 Toothed belt drive up to 18,200 N up to
10 m/s 		up to
50 m/s² 		up to
9,625 mm 		± 0.05 mm
Small modules SMS 30, 40, 50, 80, 120 Ball screw drive not specified up to
1.92 m/s 		up to
9.6 m/s² 		up to
1,439 mm
(grid lengths) 		± 0.005 mm
Precision modules PSK 50, 60, 90 Ball screw drive up to 57,300 N up to
1.6 m/s 		up to
50 m/s² 		up to
852 mm 		± 0.005 mm
Ball rail tables TKK 155, 225, 325, 455 Ball screw drive up to 180,600 N up to
1.6 m/s 		up to
50 m/s² 		up to
2,145 mm 		± 0.005 mm
Linear motor modules LMM 140, 180, 220 Linear motor up to 92,920 N up to
5 m/s 		up to
250 m/s² 		up to
4,000 mm
(grid lengths) 		± 0.001 mm
Omega modules OBB 55, 85, 120 Toothed belt drive up to 96,200 N up to
5 m/s 		up to
50 m/s² 		up to
5,000 mm 		± 0.05 mm
Feed modules VKK 50, 70, 100 Ball screw drive up to 26,000 N up to
1.27 m/s 		up to
50 m/s² 		up to
470 mm 		± 0.01 mm
Linear slides SGK 85, 100, 130, 160, 180, 230, 280 Ball screw drive up to 39,180 N up to
1.6 m/s 		up to
50 m/s² 		up to
3,710 mm 		± 0.005 mm
SOK 85, 100, 130, 160, 180, 230, 280 Ball screw drive up to 36,380 N up to
1.6 m/s 		up to
50 m/s² 		up to
3,710 mm 		± 0.005 mm
SGO 65, 85, 100, 130, 160, 180, 230, 280 without drive up to 39,180 N up to
5 m/s 		up to
50 m/s² 		up to
3,710 mm 		not specified (without drive)
SOO 85, 100, 130, 160, 180, 230, 280 without drive up to 36,380 N up to
5 m/s 		up to
50 m/s² 		up to
3,710 mm 		not specified (without drive)
Drive units AOK 20, 32, 40 Ball screw drive not specified (external guidance) up to
2.5 m/s 		up to
50 m/s² 		up to
4,660 mm 		± 0.005 mm
AGK 20, 32, 40 Ball screw drive not specified (external guidance) up to
2.5 m/s 		up to
50 m/s² 		up to
4,885 mm 		± 0.005 mm
* Longer travel distances available upon request

FAQ

1. What is a linear axis?

A linear axis is an electromechanical linear actuator that precisely guides and drives a linear movement. It combines a linear guide (profile rail guide or ball bushing guide) with a drive system such as a ball screw assembly, toothed belt drive, or linear motor. As a ready-to-install linear unit, it is used for linear positioning units, as an axis in linear robots, or as an electric linear cylinder.

2. What are the criteria for selecting a linear axis?

The decisive factors are the payload (including torques), stroke, required dynamics, positioning and repeatability, as well as installation space and installation position. High loads require rigid guides and suitable sizes, long strokes require appropriate drive concepts. These parameters determine the design and drive.

3. When is a ball screw assembly, toothed belt drive, or linear motor used?

Ball screw assemblies are used when high forces and high positioning accuracy are required. Toothed belt drives are suitable for long strokes and high speeds. Linear motors are used when maximum dynamics and highest accuracy are required without mechanical transmission elements.

4. Which linear axes are suitable for high-precision applications?

Rigid, spindle-driven linear systems (linear axes and actuators) are used for high positioning accuracy and repeatability. If maximum dynamics are also required, linear motor axes can be considered. Ultimately, guiding rigidity and the drive concept determine which solution is suitable.

5. Which linear axes are suitable for long travels and high speeds?

For long strokes and high travel speeds, linear axes with toothed belt drive are used. They enable long lengths with high dynamics and economical scalability. The selection is based on payload and integration requirements.

6. When are drive units with external guidance used?

Drive units are used when a customer-specific or existing linear guide is to be used. They provide a ready-to-install ball screw assembly with bearing and are combined with a separate, external guide. This enables design degrees of freedom with a standardized drive at the same time.

7. How are linear axes used in multi-axis systems?

Linear axes form the basis for line, surface, and room gantries in handling and positioning tasks and can be combined to form multi-axis systems via connection elements. This results in scalable cartesian linear robots, which are offered as a standard product by Rexroth.