Test Square AL B5

Aluminium is best suited for the test squares of type A and B due to its fine structure of the material itself and the even spreading of temperature. By the implementation of a special surface treatment extreme hard surfaces, with depths of layers of less than 0.1 mm can be achieved.



  • Option for fastening directly on the machine table
  • Big base
  • 4 measuring surfaces in μm - accuracy
  • Calibration SCS ISO/IEC 17025
  • The test square is bigger than the nominal dimension, so that the nominal dimension can be measured at its full size


Note: For straightness measurements in a small measuring range (appr. 50 to 300 mm ) , we present you a wide range of miniature measuring equipment.


Technical Data

Type Dimensions (L×W×H) Measuring length Squareness Weight

Measuring surfaces finely lapped, incl. calibration certificate SCS (ISO/ IEC 17025).

For other dimensions and accuracies please contact us: Contact.




GEO-plus is an easy to handle, efficient measuring and evaluation program for dynamic measurements of machine tools. Dependent on the requirements the measurement values can be read in in proportion to the time or distance.