Mitutoyo 2506A Dial Drop Indicator 0.125in Range 0.0005in Grad

Product Description

The MITUTOYO 2506A is a dial drop indicator designed for precision measurement in machining, quality control, and toolroom applications. It delivers a 0.125 inch total range with a graduation of 0.0005 inches per division, allowing technicians to detect small surface variations and runout with high resolution. The white 2-1/4 inch diameter dial displays a 0-50 reading scale, and a built-in revolution counter tracks cumulative travel. Measuring force is 1.80 N, keeping contact pressure consistent across the measurement stroke. The lug back mount integrates with standard indicator holders, magnetic bases, and surface plate setups. Machinists, quality technicians, and toolroom professionals install this indicator in production and inspection settings.

This indicator is suited for surface plate work, machine tool setup, and inspection fixtures in manufacturing and maintenance environments. It is used wherever a drop-style indicator is required, such as checking bore alignment, spindle runout, or part flatness on a comparator stand. The 0.3750 inch stem diameter fits standard indicator holders, and the lug back allows secure clamping to a variety of mounting arms and posts. Both production floor and metrology lab applications are common.

Key Features

• 0.125 inch total measurement range with 0.0005 inch graduation for high-resolution readings
• 0-50 dial reading scale on a white 2-1/4 inch diameter dial face
• Revolution counter tracks travel beyond a single dial revolution
• 1.80 N measuring force for consistent, repeatable contact pressure
• Lug back mount for compatibility with standard indicator holders and magnetic bases
• Stem diameter of 0.3750 inches fits common clamping collets and holders
• Meets ANSI/AGD standards, AGD Group 2

Compatibility

Designed as an OEM-style drop indicator conforming to ANSI/AGD Group 2 standards, fitting standard AGD-compatible indicator holders, magnetic base arms, and surface plate fixtures.

Installation Notes

A licensed machinist or quality technician typically installs and calibrates dial indicators. Secure the lug back firmly in the holder or clamp before taking measurements to prevent indicator shift. Zero the dial on a known reference surface before use. Avoid side-loading the stem, as lateral force can affect accuracy and damage the internal mechanism.