Optical Thread Measuring Instrument

Developed jointly by Chinese and German research teams, combining localised domestic engineering and application implementation, it creates the country's first purely optical thread measuring instrument through unique design and core technological advantages, used for non-contact, high-precision measurement of various external thread parameters, with extremely fast measurement speed, capable of completing multiple parameter measurements within seconds.

  • Structural design

    The machine uses a high-precision granite base and column, which offers superior thermal stability and mechanical performance compared to steel and aluminium columns. Combined with high-precision linear guides and a high-resolution (0.0001mm) optical scale readout, it enables high-precision and rapid thread measurement.

  • Dedicated measurement software

    Yuanyue Measurement and Control's exclusive dedicated thread measurement software can measure the key geometric parameters of almost all threads in a very short time, including but not limited to:


    • Pitch

    • large diameter

    • Pathway

    • Medium diameter

    • Tall teeth

    • Root Radius

    • Elevation angle

    • Helix angle

    • Tooth angle

    • Right corner

    • Left corner

    • Roundness / Cylindricity

  • Technical Features

    01 High-precision granite base and column

    Using granite with a low coefficient of thermal expansion as the material demonstrates excellent thermal stability and mechanical performance. Its low coefficient of thermal expansion ensures that dimensions remain constant even in environments with temperature fluctuations, thus providing a solid foundation for precision measuring instruments.

    02 Optical system: large field of view, high-resolution telecentric industrial lens and matrix camera.

    A 25-megapixel high-resolution CCD camera produces bright and clear images, coupled with a large-field telecentric transmitted light source and dual telecentric lenses, combined with a precision motion control system to perform optical scanning of thread profiles.

    03 High-resolution raster system

    German HEIDENHAIN (RSF) digital grating system (measuring digital display), with a resolution of 0.0001 mm.

    04 Wide measurement range, comprehensive functions

    Typically covering a wide range of thread sizes, such as external threads: M1 ~ M100 or even larger, and can be customised according to customer requirements. It can not only measure a single parameter but also conduct comprehensive evaluation, complying with modern geometric tolerance standards.

    05 Measurement is fast and efficient

     With a single setup, all parameter measurements can be completed in seconds, far surpassing traditional contact thread gauges.

    06 Automatic measurement, data traceable

    Automatically recognise thread profiles, compare them with standards (ISO, DIN, GB, etc.) or customised tolerance zones, automatically determine OK/NG; automatically generate detailed measurement reports (PDF, Excel), supporting SPC statistical analysis.

    All measurement data is electronically stored for easy quality traceability and analysis.

    07 Non-contact measurement

    It does not cause scratches or pressure deformation on the thread surface, making it especially suitable for soft, coated, polished, and high-gloss threads.

    08 High precision

    The measurement accuracy reaches the micron level, meeting the requirements of high-precision manufacturing.

    09 Intelligent solutions

    Specialised non-contact laser probes can be selected according to customer requirements to measure the inner inclination angle of fastening flanges and the root fillet radius.

    It can integrate robots for automatic loading and unloading, forming a fully automatic thread measurement station.

    Suitable for 100% online inspection on production lines or mass sampling