Mitutoyo 2978AB Dial Drop Indicator 0.001 in Graduation

Product Description

The MITUTOYO 2978AB is a dial drop indicator designed for precise vertical measurement in machining, inspection, and surface measurement applications. It covers a 0.06 inch total range with a 30-0-30 dial reading and 0.001 inch graduation, delivering accuracy to 0.001 inch. The flat back design allows the indicator to mount flush against a magnetic base, surface gauge, or transfer stand. With a 2.24 inch white dial face and a range of 0.079 inches per revolution, the 2978AB gives machinists, tool and die technicians, and quality control inspectors a clear, readable display during close-tolerance measurement work.

This dial drop indicator is suited for use on manual mills, surface plates, lathe setups, and inspection fixtures where vertical or perpendicular measurement is required. The 3/8 inch stem diameter fits standard indicator holders and magnetic bases. The compact overall length of 4.27 inches and stem length of 0.78 inches allow use in confined setups. The dustproof and shockproof construction makes it appropriate for shop-floor use in production and quality environments alike.

Key Features

• 0.06 inch total measurement range with 0.001 inch graduation
• 30-0-30 bidirectional dial reading for both positive and negative deviation measurement
• Flat back mounting for flush seating on magnetic bases and surface gauges
• Dustproof and shockproof construction for shop-floor durability
• 2.24 inch white dial face for high contrast readability
• Meets ANSI/AGD standards for dial indicator accuracy and performance

Compatibility

Designed for use with standard 3/8 inch stem indicator holders, magnetic bases, and surface gauges. No specific system or model compatibility was stated by the manufacturer for this part.

Installation Notes

Installation is performed by machinists, toolmakers, and metrology technicians using standard indicator holders or magnetic base assemblies. Secure the 3/8 inch stem firmly in the holder collet before taking measurements to prevent slippage or false readings. Power down any motorized equipment before positioning the indicator on a spindle or fixture. Do not exceed the stated measuring force range, as excessive contact force can affect accuracy and damage the indicator mechanism.