Mitutoyo 511-753-20 Dial Bore Gage 2 to 6 Inches

Product Description

The MITUTOYO 511-753-20 is a dial bore gage designed to measure internal bore diameters in the range of 2 to 6 inches. It uses a two-point contact system and a pendulum guide structure that allows the gage to slide into alignment within the bore, producing consistent, repeatable readings. Accuracy is rated at 0.0001 inches, making it suitable for precision inspection of machined bores, cylinders, and housings. The unit comes with 11 interchangeable anvils to cover the full measurement range. A dial indicator is included, and accessories are bundled in the package. This tool is used by machinists, quality control technicians, and precision measurement professionals.

The 511-753-20 is suited for inspection work in machine shops, manufacturing facilities, and maintenance environments where internal bore measurement is required. The ovalness and taper measurement capability makes it useful for evaluating bore geometry beyond simple diameter checks. The included anvils allow a single gage to span a wide diameter range without additional tooling. It is appropriate for both production-floor spot checks and detailed metrology tasks.

Key Features

• Measurement range: 2 to 6 inches internal bore diameter
• Accuracy: 0.0001 inches
• 11 interchangeable anvils included for full range coverage
• Two-point contact system for consistent bore alignment
• Pendulum guide structure allows natural centering during measurement
• Capable of measuring ovalness and taper in addition to diameter
• Dial indicator included; accessories included

Compatibility

Designed as a direct-use precision measurement tool for internal bore diameters from 2 to 6 inches. Compatible with standard bore gage accessories and replacement anvils in the same size class. No specific machine or system compatibility is stated by the manufacturer for this gage.

Installation Notes

Dial bore gages require zeroing against a ring gage or micrometer-set master before use. Handle the anvil tips carefully to avoid damage that would affect accuracy. Calibration should be verified periodically per the facility quality plan or applicable metrology standards. Store the gage in its case when not in use to protect the dial indicator and anvil contact points.