Mitutoyo 337-304 Electronic Inside Micrometer 8-60 in

Product Description

The MITUTOYO 337-304 is a digital electronic inside micrometer designed for precision internal bore and diameter measurements. It uses an extension rod system to span a measurement range of 8.0000 to 60.0000 inches, making it well suited for large-bore applications where a standard inside micrometer falls short. The instrument resolves to 0.0001 inch (0.001 mm) and includes a digital counter with data output capability, allowing readings to be logged directly to a compatible data collection system. Licensed metrology technicians, quality control inspectors, and precision machinists are the primary users of this tool.

This inside micrometer is applied in manufacturing, machining, and quality assurance environments where large internal diameters must be verified to four decimal places. The extension rod configuration allows a single instrument to cover a wide span without switching to a completely different gage. Typical applications include measuring cylinder bores, large pipe fittings, housing bores, and industrial machinery components. The data output feature supports SPC workflows and digital record-keeping in production environments.

Key Features

• Measurement range: 8.0000 to 60.0000 inches via extension rod system
• Resolution of 0.0001 inch and 0.001 mm for high-precision readings
• Digital counter display for fast, direct reading without interpolation
• Data output port supports connection to SPC systems and data loggers
• Extension rod type design covers a wide internal diameter range with one instrument
• Gage depth of 1 inch for consistent contact in bore measurement setups

Compatibility

Designed as an OEM-style electronic inside micrometer intended for use with compatible MITUTOYO extension rod sets and accessories appropriate to the 337-series instrument family, as specified in MITUTOYO documentation.

Installation Notes

Inside micrometers of this type are handled and calibrated by metrology technicians or qualified machinists. Before use, verify the instrument is zeroed against a known reference standard appropriate to the measurement range. Extension rods must be fully seated and locked before taking a measurement to prevent false readings. This instrument is not rated for use in environments with excessive vibration, coolant immersion, or temperature extremes outside the manufacturer-specified range.