Mitutoyo 511-742-20 Dial Bore Gage 1.4 to 2.5 in 6 Anvil

Product Description

The MITUTOYO 511-742-20 is a dial bore gage designed for precise internal diameter measurement across a range of 1.4 to 2.5 inches. Built around a two-point contact system and pendulum guide structure, it delivers repeatable readings with an accuracy of 0.000080 inches. The gage comes with 6 anvils to cover its full measurement range without switching to a separate instrument. It is used by machinists, precision mechanics, and quality control technicians working in automotive, industrial, and manufacturing environments where bore dimension verification is critical.

This gage is suited for measuring cylindrical bores in engine blocks, hydraulic cylinders, pump housings, and similar components where tight tolerances must be confirmed. Its pendulum guide structure keeps the gage centered during measurement, allowing the slide to travel smoothly through the bore. The two-point contact system enables detection of ovalness and taper within the bore, not just a single diameter reading. It is appropriate for both shop-floor inspection and precision rebuild work where documentation of bore geometry is required.

Key Features

• Measurement range of 1.4 to 2.5 inches covered by a single instrument with 6 included anvils
• Accuracy of 0.000080 inches for high-precision bore verification
• Two-point contact system enables detection of ovalness and taper
• Pendulum guide structure centers the gage and allows smooth slide travel through the bore
• Includes indicator and accessories as part of the standard package

Compatibility

Designed as an OEM-style precision measurement tool for use in any application requiring internal diameter inspection within the 1.4 to 2.5 inch range.

Installation Notes

Dial bore gages are used by machinists and precision technicians and require no power source or wiring. Before use, zero the gage against a calibrated ring gage or micrometer setting standard at the target diameter. Handle anvils and the dial indicator with care to avoid dropping or impacting, as damage will affect calibration. Store in the provided case when not in use to protect measuring surfaces.