Spi 14-223-2 Dial Drop Indicator 0.1 in 0.001 Graduation

Product Description

The SPI 14-223-2 is a plunger-style dial drop indicator designed for precision dimensional measurement in machining, tooling, and inspection applications. It features a 0.1-inch measurement range with 0.001-inch graduation increments and a 0-100 dial reading scale. The 1.55-inch diameter dial face provides clear readability, and the fully jeweled bearing construction reduces friction for consistent, repeatable readings. This indicator includes NPL traceability certification, making it suitable for quality assurance workflows where documented measurement standards are required. It is installed and used by machinists, tool and die makers, and metrology technicians.

This indicator is well suited for machine shop environments, inspection departments, and surface plate work. The included accessories support a wide range of fixturing setups, including tool post mounting and universal clamping configurations. The 4-48 threaded stem is a standard interface for indicator holders and magnetic bases commonly used in both manual and CNC machining environments.

Key Features

• 0.1-inch measurement range with 0.001-inch graduation for fine dimensional checks
• Fully jeweled bearing construction for low friction and long service life
• 1.55-inch dial diameter for easy reading at the machine or inspection table
• 4-48 threaded stem for compatibility with standard indicator holders and magnetic bases
• NPL traceability certification included for quality assurance and calibration documentation
• Kit includes G clamp, universal clamp, tool post holder, and two holding rods for flexible fixturing

Compatibility

Designed for use with standard 4-48 threaded indicator holders, magnetic bases, and tool post holders common in machine shop and inspection setups. Included accessories are 5/16-inch by 3-inch and 5/16-inch by 5-inch holding rods, a G clamp, a universal clamp, and a tool post holder.

Installation Notes

Installation is performed by machinists or metrology technicians using standard indicator holders or magnetic bases with a 4-48 thread interface. Secure the stem firmly in the holder before zeroing the dial to avoid measurement drift. Handle the indicator carefully to avoid shock loading the jeweled bearings, which can affect calibration. Follow shop calibration procedures and retain the NPL traceability documentation for quality records.