Spi 21-376-9 Dial Test Indicator 0.0001 in Graduation

Product Description

The SPI 21-376-9 is a horizontal-style dial test indicator designed for precision measurement in machining, inspection, and quality control applications. It delivers a maximum measurement range of 0.008 inches with a dial graduation of 0.0001 inches, making it well-suited for tasks requiring close tolerance verification. The indicator features a fully jeweled movement with a satin chrome finish and a white 1.25-inch diameter dial face marked in a 0-4-0 reading format. The dovetail mount provides rigid, universal positioning on indicator holders and surface gages. This instrument is NIST-traceable and ships with a short-form certificate of calibration.

This dial test indicator is used in precision measurement environments including machine shops, tool rooms, and quality assurance labs. Typical applications include runout checks, surface parallelism verification, part alignment on milling machines and lathes, and setup confirmation on surface plates. The horizontal indicator style is preferred when checking low-clearance surfaces or when a compact profile is needed. The dovetail mount accepts standard extensions for flexible positioning.

Key Features

• 0.008 inch maximum measurement range with 0.0001 inch graduation for high-resolution readings
• Fully jeweled movement for durability and repeatable accuracy
• Satin chrome finish on housing for corrosion resistance and professional appearance
• Dovetail mount with included 5/32 inch and 3/8 inch dovetail extensions for versatile setup
• NIST-traceable calibration with short-form certificate of calibration included
• Kit includes two contact points, height gage bar, universal clamp, and fitted carrying case

Compatibility

Designed for use with standard dovetail-style indicator holders, height gages, and surface gage arms commonly found in machine shop and inspection environments.

Installation Notes

Dial test indicators of this type are typically set up by machinists or quality control technicians using a dovetail holder or magnetic base. Secure the indicator firmly in the holder before zeroing to prevent drift during measurement. Avoid side-loading the contact point beyond the rated range, as this can affect jeweled bearing accuracy. Store the indicator in its fitted case when not in use to protect the movement and contact points.