Mitutoyo 2805AB-10 Dial Drop Indicator 0.05 in

Product Description

The MITUTOYO 2805AB-10 is a dial drop indicator designed for precision dimensional measurement in machine shop, tool room, and quality control applications. It delivers a 0.05 inch total range with 0.0001 inch graduation per division and 0.01 inch travel per revolution, providing the resolution required for close-tolerance inspection work. Accuracy is rated at 0.0001 inch. The indicator features a jeweled bearing spindle mechanism for consistent, low-friction operation and is built to ANSI/AGD standards. A built-in revolution counter tracks cumulative travel across multiple revolutions, reducing misreading errors during setup and gauging routines.

This drop indicator is suited for use in surface plate inspection, comparator stand setups, machine tool alignment, and fixture gauging in both job shop and production environments. The 0-5-0 bidirectional dial reading allows deflection measurement in either direction from zero without re-zeroing. The white dial face with black graduations supports easy reading under shop lighting. Machinists, toolmakers, quality technicians, and metrologists are the primary users of this instrument.

Key Features

• 0.05 inch total measurement range with 0.0001 inch graduation
• 0-5-0 bidirectional dial reading for positive and negative deflection
• Jeweled bearing spindle for low-friction, repeatable contact
• Shockproof construction for durability in shop environments
• Built-in revolution counter to track cumulative travel
• Flat back mounting for compatibility with standard indicator holders and comparator stands
• Meets ANSI/AGD standards for dial indicator performance

Compatibility

Designed as a direct-fit replacement or upgrade for AGD Group 0 dial drop indicators used with standard indicator holders, comparator stands, and surface gauge arms accepting a 3/8 inch stem diameter.

Installation Notes

This instrument is installed by machinists and quality technicians using standard indicator holders or magnetic base assemblies. Before mounting, ensure the contact point thread matches the intended tip accessory and that the stem clamp does not exceed the 3/8 inch stem diameter specification. Avoid clamping directly on the stem body with excessive force, as this can damage the jeweled bearing mechanism. Handle with care during installation to preserve calibration and shock resistance.