The special feature of this innovative product is its special vacuum air bearing system. The STRAIGHT-line slide is held by vacuum against the guideways, but direct contact is at the same time prevented by air bearing. This ensures stable and practically invariable pretension.


Application areas:

  • Measuring instrument for quality assurance under workshop to laboratory conditions
  • Calibration and verification of test and measurement equipment
  • Align and control / recording of straightness and parallelism of linear guideways or linear axes
  • Measuring of straightness, parallelism and torsion of workpieces and assemblies
  • Alignment of workpieces on clamping devices and plate changers



  • High-precise, wear-free air bearing of the measuring slide
  • High air bearing stability and rigidity
  • Unmatched repeatability
  • Resistance-free linear movement of the measuring slide
  • Minimum air bearing noise
  • Versatile measurement capabilities with the optional accessories CARBON-stand
  • Possibility of dynamic measurements with software XPRO-k2 / k4
  • Incl. calibration SCS (ISO/IEC 17025)


The company Kunz precision AG is a leader in the revision and calibration of hard stone test plates and measuring equipment.


Technical Data

Type Dimensions (L×W×H) Weight Required guideway surface horizontal/lateral Angle of the guideway surfaces Maximum edge bevelling Repeatability standard/ultra Motorisation Length measuring system Speed Required compressed air
other variations

Flatness of the guideway surfaces: recommended quality DIN 876/00.

For special solutions or other sizes please contact us: Contact.



Air treatment unit SA 100

The air treatment unit SA 100 is used for cleaning and the regulation of the compressed air as well as to generate the required vacuum. This air conditioning unit is, amongst other applications, used for the vacuum air bearing measuring slide STRAIGHT-line.



To make measuring with the measuring device STAIGHT-line even more easy and efficient, you can order the CARBON-stand as a practical option. The bracket is adjusted to the correct height on the vertical column with knurled screws, and then clamped in the correct position.



The optional FINE-step fine adjustment saddle facilitates high-precision positioning of the STRAIGHT-line. Among other advantages, this makes high-precision length measurements a simple task.


Measuring Probes

We have several probes in our range.


Control / Motorization

For STRAIGHT-line and STRAIGHT-set: With the manual operation set RECO the measuring slide can be travelled in different speed – wired or wireless.