Starrett 12520 Dial Test Indicator 0.2mm Horizontal

Product Description

The STARRETT 12520 is a horizontal-style dial test indicator designed for precision dimensional measurement in machining, toolroom, and metrology applications. It features a jeweled bearing movement and a precision gear-driven design that delivers accurate readings across a 0.2 mm measurement range with 0.002 mm graduations. The 1-9/16 inch diameter dial is finished in high-contrast yellow for easy reading under shop conditions. The narrow body profile allows access in tight setups where a standard dial indicator would not fit. Licensed machinists, tool and die makers, and quality control technicians are the primary installers and users.

The 12520 is suited for surface plate inspection, machine tool setup, fixture verification, and part runout checks in both job shop and production environments. The horizontal contact point orientation makes it especially useful for measuring in confined spaces or on horizontal surfaces where a vertical indicator would interfere with the workpiece or fixture. The contact point reverses automatically, and the contact is field-replaceable, reducing downtime during high-use inspection routines. Compatible dovetail clamp hardware is included for mounting to standard indicator holders and magnetic bases.

Key Features

• Jeweled bearing movement for low friction and extended service life
• Precision gear-driven design with 0.002 mm dial graduation
• High-contrast yellow dial with 0-100-0 bidirectional reading scale
• Narrow body profile for access in tight measurement setups
• Contact point reverses automatically and is field-replaceable
• Satin chrome finish for corrosion resistance in shop environments
• Includes two dovetail clamps, a case, and one contact point

Compatibility

The STARRETT 12520 belongs to the 3908 Series and mounts via standard dovetail attachment, making it compatible with dovetail-style indicator holders and arms commonly used with magnetic base setups in toolroom and inspection environments.

Installation Notes

Installation is performed by machinists or quality technicians using a dovetail clamp and a compatible indicator holder or magnetic base arm. Secure the dovetail clamp firmly before taking measurements to prevent indicator movement during contact. Verify that the contact point is properly threaded and seated before use. Follow ANSI and ASME B89 metrology practices for zeroing and calibration verification prior to production inspection work.