Mitutoyo 301659 Drop Indicator Replacement Rod

Product Description

The MITUTOYO 301659 is a replacement rod designed for use with Mitutoyo drop indicators. Drop indicators rely on a precision-machined contact rod to transfer linear displacement to the dial mechanism, making rod condition critical to measurement accuracy. This replacement rod measures 4 inches in length with a 5 mm diameter, and is sold as a single-piece unit. It is installed by calibration technicians, metrology lab personnel, and machine shop professionals who maintain drop indicators used in surface measurement, inspection fixtures, and comparative gauging applications.

This rod is suited for maintenance and repair of Mitutoyo drop-style dial indicators used in precision measurement environments. Typical applications include machine tool setup, quality control inspection benches, and gauge maintenance programs where worn or damaged contact rods reduce measurement reliability. The part ships as a quantity of one and is intended as a direct OEM replacement component.

Key Features

• OEM replacement rod for Mitutoyo drop indicators
• Rod length: 4 inches
• Rod diameter: 5 mm
• Single-piece unit packaging
• Restores accurate linear displacement transfer in drop indicator assemblies

Compatibility

Designed as an OEM-style replacement rod for Mitutoyo drop indicators requiring a 4-inch, 5 mm diameter contact rod. Consult the specific indicator model documentation to confirm fitment before installation.

Installation Notes

Installation should be performed by a qualified metrology technician or calibration professional familiar with precision indicator disassembly. Remove the indicator from any active measurement fixture before servicing and handle the replacement rod carefully to avoid surface damage that could affect measurement accuracy. After installation, verify indicator calibration against a known reference standard before returning the instrument to service.