Starrett 78MXTZ-125 Inside Micrometer 100-125mm Range

Overview

The Starrett 78MXTZ-125 is a precision inside micrometer designed for measuring internal bores ranging from 100 to 125mm. It is intended for manufacturing, quality control, and precision measurement applications where high accuracy and consistency are critical.

The instrument features self-centering contacts, tungsten carbide measuring faces, and a ratchet stop mechanism to ensure reliable, repeatable measurements. Its design allows wide measurement range without requiring anvil changes, and provides blind bore measurement capability for difficult-to-access applications.

Key Features

• Measurement range: 100 to 125mm without changing anvils
• Resolution: 0.005mm (0.00025 inch)
• Tungsten carbide measuring faces on 3-point contact heads
• Ratchet stop ensures consistent measurements
• Self-centering 3-point contact design for accurate readings
• Blind bore measuring capability above 1/2 inch (12.5mm) diameter
• Setting rings included for calibration
• Extensions available up to 150mm (6 inches) for deeper bore measurement

Applications

• Precision bore and cylinder measurement
• Internal diameter inspection in manufacturing
• Quality control and dimensional verification
• Automotive component measurement
• Engine block and cylinder head inspection
• Industrial machinery maintenance and adjustment

Included Accessories

• Setting ring for calibration
• Measuring contacts and extensions
• Adjustable wrenches
• Protective carrying case
• Instruction manual