Starrett 55793 Dial Bore Gage 0.56-1.565 in 7 Anvil

Product Description

The STARRETT 55793 is a dial bore gage designed to measure internal bore diameters from 0.56 to 1.565 inches with a graduation of 0.0001 inches. It uses a two-point contact, self-centering design that locates the gage automatically within the bore for consistent, repeatable readings. The unit includes an indicator and comes with seven interchangeable anvils, allowing coverage across its full measurement range without additional accessories. Machinists, tool-and-die technicians, and precision measurement professionals use this gage for quality inspection tasks where tight tolerances are critical.

This gage is suited for shop-floor inspection and precision metrology work in manufacturing, machining, and maintenance environments. Typical applications include checking cylinder bores, hydraulic valve bodies, pump housings, and other close-tolerance internal diameters in both production and repair settings. The self-centering anvil system allows the technician to detect bell-mouth conditions and out-of-roundness in a single setup, reducing inspection time. A storage case is included, making the kit ready for bench or field use.

Key Features

• Measurement range of 0.56 to 1.565 inches with 0.0001 inch graduation for high-resolution readings
• Self-centering, two-point contact design for consistent bore location and repeatable results
• Seven anvils included to cover the full measurement range
• Detects bell-mouth and out-of-roundness conditions in a single setup
• Indicator included — no separate purchase required
• Storage case included for organized transport and protection of components
• Comes with two adjusting wrenches for anvil changes and setup

Compatibility

Designed as a general-purpose internal bore measurement tool compatible with standard dial indicator bore gage applications across machining and precision inspection workflows.

Installation Notes

Dial bore gages are typically set up and used by machinists, metrologists, or precision maintenance technicians. Before use, zero the gage against a calibrated ring gage or micrometer setting fixture matched to the nominal bore diameter. Handle the anvils and indicator with care to avoid dropping or impacting components, as this can affect calibration. Follow the manufacturer instructions included with the storage case for proper anvil selection and wrench use during setup.