Diameter measuring machine LMU-175

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The Standard of Accuracy ...and the most popular instrument in industry for over 31 years! With instrument uncertainty to 2 millionths of an inch (50 nanometers), the Labmaster Universal - Model 175 is suitable for virtually all Internal (ID), external (OD), and same side dimension (SD*) measuring applications. This laser-based universal length measuring machine (ULM) has been developed by Pratt & Whitney for gage calibration laboratories that need to precisely measure length, outside diameter, inside diameter, pitch diameter, lead, major/minor diameter, taper, linear displacement, and thickness. High accuracy is maintained by its laser interferometer, zero Abbe offset design, and large measuring table (100 lb [45 kg] capacity) with center position, height, pitch, and yaw controls. The computer-controlled precision air bearing slide and gaging probes remove operator-influenced errors commonly observed with traditional gaging methods by maintaining constant force. It also greatly minimizes wear and tear to both the measuring standards and the instrument. Air bearings are also highly resistant to contamination and have inherent vibration-damping properties that increase stability and accuracy. The large measuring table also acts as a soak plate. By design, the weight of the part will not affect the measurement because the table support is independent of the air bearing slide. This is not the case with traditional methods.