Mitutoyo 301657 Drop Indicator Replacement Rod 2 in

Product Description

The MITUTOYO 301657 is a replacement contact rod designed for use with Mitutoyo drop indicators. The rod measures 2 inches (5 mm diameter) and is used to restore worn or damaged indicator components to factory specification. Drop indicator contact rods are precision-ground components that directly affect measurement accuracy, making correct replacement critical for maintaining gauge calibration and repeatability. This part is installed by metrology technicians, quality control personnel, and precision tool service professionals.

This replacement rod is suited for applications where the original contact rod on a Mitutoyo drop indicator has been damaged, worn, or lost. Drop indicators are commonly used in machine shops, inspection departments, and production environments to measure surface variation, runout, and part alignment. Keeping spare replacement rods on hand reduces downtime during precision measurement workflows.

Key Features

• 2-inch rod length for direct OEM-style replacement
• 5 mm rod diameter for proper fit in compatible Mitutoyo drop indicator bodies
• Sold individually (package quantity of 1)
• Designed to restore measurement function and maintain gauge accuracy

Compatibility

Designed as an OEM-style replacement rod for compatible Mitutoyo drop indicator models. Confirm fitment against your specific indicator model before ordering.

Installation Notes

Installation should be performed by a qualified metrology technician or tool service professional. Before servicing the indicator, ensure the gauge is removed from any active measurement setup and the spindle is relieved of load. Consult Mitutoyo service documentation for disassembly and reassembly procedures specific to your indicator model. After replacement, recalibrate the indicator against a known reference to verify accuracy.