Starrett 12333 Dial Test Indicator 0.03 in Horizontal

Product Description

The STARRETT 12333 is a horizontal-style dial test indicator designed for precision measurement in machining, inspection, and surface-plate work. It features a jeweled movement and a precision gear-driven design that delivers reliable, repeatable readings across its 0.03 inch total range with a graduation of 0.0005 inches per division. The 0-15-0 balanced dial face is printed in high contrast on a white background with a satin chrome finish body, making readings fast and accurate under shop conditions. The narrow body and dovetail mount allow this indicator to fit into tight setups where a standard back-mount indicator would not reach. Machinists, tool-and-die makers, and quality control technicians are the primary users.

This indicator is suited for use on surface plates, magnetic bases, transfer stands, and machine tool setups in both production and inspection environments. The dovetail mount is the standard attachment method for this series, and two dovetail clamps are included in the package. The contact point reverses automatically, making it practical for measuring in both directions without resetting the fixture. The 12333 is part of the STARRETT 3909 series and ships complete with a case and one contact point.

Key Features

• 0.03 inch maximum measurement range with 0.0005 inch graduation per division
• 0-15-0 balanced dial reading for bidirectional measurement without dial rotation
• Jeweled movement for reduced friction and extended service life
• Dovetail mount with two dovetail clamps included for immediate use
• Contact point reverses automatically; contact is also user-replaceable
• Narrow body design for access in confined setups
• Satin chrome finish; complies with ANSI and ASME standards

Compatibility

Designed as an OEM-style dial test indicator in the STARRETT 3909 series; compatible with standard dovetail-mount indicator holders, arms, and bases used in general machining and inspection setups.

Installation Notes

Dial test indicators of this type are installed and serviced by machinists and metrology technicians. Before mounting, ensure the dovetail clamp is clean and free of chips that could introduce angular error in the setup. Do not overtighten the dovetail clamp, as excess clamping force can distort the indicator body and affect accuracy. Verify stylus contact angle relative to the measured surface, as cosine error increases when the contact arm deviates significantly from perpendicular to the measurement axis.