Internal 3-point micrometers

Process of measuring internal diameters is much more complicated than external. Use of reliable and high-quality tool will simplify the task of technical personnel and speed up the production process.

Three-point internal micrometer are used with high accuracy to measure the internal diameters of cylinders, sleeves, through holes and blind hol...

Process of measuring internal diameters is much more complicated than external. Use of reliable and high-quality tool will simplify the task of technical personnel and speed up the production process.

Three-point internal micrometer are used with high accuracy to measure the internal diameters of cylinders, sleeves, through holes and blind holes.

Three-point internal micrometer are used in instrumental and machine-building production, car services, mechanical assembly shops, for example, for measuring engine cylinders.

Operating principle is based on converting the mutual movement of probes , located at angle of 120 º, into the internal diameter.

Modifications of reading devices are nonius (НМТ) and digital (НМТЦ).

Readout of vernier three-point internal micrometer is performed by scales of the sleeve  and drum of the micrometer screw, for digital micrometer - digital reading device.

A wide measuring range of three-point internal micrometer allows measuring holes from 2 mm to 1000 mm.

Modern digital three-point internal micrometer with a resolution of 0.0001 mm allow to measure holes in hard-to-reach places at depth up to 3000 mm with high accuracy.

The measurement accuracy with three-point internal micrometer in comparison with two-point type HM, indicator type НИ and НИЦ is achieved due to three-point contact with contour of the measured area.

  Advantage of contact in three directions is a self-centering and self-leveling micrometer system, which exclude  subjective errors.

Design of three-point internal micrometer provides centering in any hole, cylinder or tube automatically. This excludes the need to center caliper manually.

Micrometer set includes an adjusting ring for initial installation. 

Advantage of digital versions is easy to use. You do not need to know a complex system of  readings by scale with nonius. Measurement results are displayed directly on the display. Thanks to this, the reading of measurement data and work process is accelerated.
        Due to presence of  special data exchange interface in modern digital three-point internal micrometer, the measurement results can be transferred to an external device for further processing.

Digital three-point internal micrometer  of Ukrainian and foreign production (SYLVAC, DIN) are issued with characteristics that corresponding technical specifications, standards of the manufacturer and other technical standards.

If necessary, digital three-point internal micrometer can be repaired, restored by qualified specialists of enterprises, calibration according to DSTU ISO / IEC 17025 and the issuance of a calibration certificate in an accredited laboratory.

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Internal 3-point micrometers There are 62 products.

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