The internal micrometer is a precision instrument used to accurately measure the internal dimensions of workpieces. It is particularly used in metalworking and manufacturing when exact diameters need to be determined.

Huge measuring range from Ø 30 to 400 mm is covered with 6 instruments. Max. Ø 1150 mm Highest precision: Error limit ± 2 µm up to Ø 140 mm / ± 4 µm up to Ø 400 mm, repeatability ± 1 µm 1 revolution = 1 mm. Display of 1 mm, 0.01 (100 divisions/rev), 0.001 (Vernier) no reading errors, no calculations! Automatic self-centering for easy and safe handling Blind hole measurement down to the bottom, even for deep boreholes. Can be extended over several meters without loss of accuracy Thermally protected and thermal compensating construction Automatic, linear wear correction through simple adjustment Cost reduction through high measuring range Savings on calibration and certification costs Highly accurate, durable performance, low cost SwissMade A detailed description of our system and its advantages can be found

Unsere Innenmikrometer sind auf höchste Genauigkeit ausgelegt und bieten eine präzise Messung im Mikrometerbereich. Die spezifischen Genauigkeitsangaben finden Sie in den technischen Spezifikationen des jeweiligen Modells.

Our digital internal micrometers support millimeters and inches. You can easily set the units you want according to your requirements.

Die korrekte Verwendung des Innenmikrometers erfordert Sorgfalt und Präzision. Setzen Sie die Schraube vorsichtig in das Werkstück ein und drehen Sie sie, bis ein leichter Kontakt besteht. Lesen Sie dann den gemessenen Wert auf der Skala oder dem digitalen Display ab. Detaillierte Anweisungen finden Sie in der beigefügten Bedienungsanleitung. Das MICROTEST®-Innenmikrometer in die Bohrung einführen, Taster hinausschrauben bis sie an der Bohrungswand anliegen. Dann die Ratsche 5–6 mal eine halbe Umdrehung gut durchdrehen, um eine exakte Zentrierung zu erreichen. (MICROTEST® 400-1100 mm 8-10x durchratschen.) Beachten Sie: Immer im Messanschlag ablesen, nicht zurückdrehen. Bei Sacklochmessungen ist darauf zu achten, dass mindestens die Hälfte des Tasters in der Bohrung anliegt. Vor genauen Messungen sollten jeweils das Innenmikrometer im Kontrollring überprüft und evtl. justiert werden, da diese durch äusserliche oder andere Einflüsse dereguliert sein könnten. Falls ganz genaue Messungen erwartet werden, empfiehlt es sich, mit dem MICROTEST®-Dreipunkt-Innenmikrometer um ca. 60° (ev. 30°) versetzt, eine zweite, resp. dritte Messung vorzunehmen, um ev. Polygonformen der Bohrung zu erfassen.

Calibrating our internal micrometer is simple and easy to use. Each unit is calibrated before shipping, but we still recommend regular checks to ensure accuracy is maintained. Detailed instructions can be found in the attached manual.

The MICROTEST® internal micrometer is placed in the setting ring in the measuring stop, the slotted screw on the vernier ring is loosened and the vernier scale is set to the setting dimension. Then the vernier ring is lightly secured again with the slotted screw. Please ensure that the device and the setting ring are at the same temperature. (Leave the device in the measuring stop in the setting ring for approx. 1 hour beforehand.) When adjusting, it is essential to take the measurement error according to the inspection certificate into account. Adjust the setting ring deviation and device error according to the certificate.

Check whether the vernier ring is rubbing against the scale drum. If this is the case, loosen the vernier ring and reattach it with a little play. Clean the outside of the inside micrometer. When extended, check whether the measuring probes are dirty.

To ensure the accuracy of your internal micrometer, we recommend regular calibrations. This can either be done in-house or you can contact our customer service department for calibration assistance.

We advise against carrying out repairs yourself.

To maximize the lifespan of your internal micrometer, we recommend that you clean it carefully after each use and ensure that it is stored correctly. Avoid shocks and extreme temperatures to protect the sensitive components. If treated carefully, the MICROTEST® internal micrometer will not require any maintenance for a long time, but the outside of the device should be cleaned occasionally with methylated spirits (ethyl alcohol) or similar. Important: Do not touch the plastic parts with non-polar solvents.

Avoid leaving the internal micrometer in a hot workpiece. There is a risk of damage due to shrinkage of the workpiece.

Yes, we offer spare parts for our internal micrometer. You can contact our customer service to order the parts you need and for receiving further assistance.