Diatest BMD

The Diatest BMD is an easy-to-use, self-indicating and self-centering bore gage for the measurement of inner and outer diameter, with the highest precision and most accurate results.

Special Features


BMD allows:

  • Static and dynamic measurement
  • Detection of dimensional deviations and shape defects
  • As a hand tool in bores directly at the machine
  • Fitting in measuring fixtures and machines


A wide selection of basic types in the standard program, supplemented by useful accessories, ensures nearly all bores encountered can be measured precisely. Its flexible platform allows a wide area of application:

  • Standard – und Through bores: from 2.0 to 270 mm
  • Measurement of Blind Bores(Flat-Bottom): from 2.0 (T-BMD-FB) to 150 mm
  • Measurement of O.D.: from 20 to 100 mm
  • Multiplane plug gages: from 21 mm
  • Internal gear gages: from 10 mm cylinder diameter
  • 3-Point Measurement: from 8.0 to 100 mm
  • For very small diameters from 2.0 mm to 3.0 mm
  • Measurement of parallel distances: from 1.0 (T-BMD-PA) to 30 mm
  • Special sizes, shapes and models, e. g. tapered bores
  • Extension or limitations of the measuring range, adjustment of the measuring pressure, air supply, etc.