Starrett 53310 Dial Drop Indicator 0-3 in 0.001 Grad

Product Description

The STARRETT 53310 is a dial drop indicator designed for precise linear measurement in professional inspection, machining, and tooling applications. It covers a 0 to 3 inch measurement range with a 0.001 inch graduation, giving technicians and machinists the resolution needed for accurate surface, runout, and alignment checks. The 2-1/4 inch white dial face uses a 0-100 dial reading with a revolution counter to track cumulative travel. The indicator features a jeweled bearing, a stainless steel stem measuring 0.375 inches in diameter and 2.8125 inches in length, and an unbreakable crystal with a no-glare satin finish for clear readings in varied lighting conditions.

This indicator is suited for use in machine shops, tool rooms, quality control stations, and field alignment work. It mounts via a lug back and ships with a flat back included, giving installers flexibility in fixture setup. The 0.1 inch travel per revolution keeps reading transitions predictable during inspection routines. It is appropriate for use with standard indicator holders and magnetic base setups common in precision trade environments.

Key Features

• 0 to 3 inch measurement range with 0.001 inch graduation for high-resolution readings
• Jeweled bearing construction for smooth, repeatable stem travel
• Revolution counter tracks total stem travel across the full 3 inch range
• Lug back mount included with flat back adapter for flexible fixture options
• Unbreakable crystal with no-glare satin finish for clear viewing in shop conditions
• Stainless steel stem, 0.375 inches in diameter and 2.8125 inches in length

Compatibility

Designed as an OEM-style drop indicator compatible with standard lug back and flat back indicator holders, magnetic bases, and dial indicator fixtures used in precision measurement and inspection setups.

Installation Notes

Installation is performed by machinists, metrologists, or precision trade professionals using standard indicator mounting hardware. Secure the indicator firmly in the holder before zeroing to prevent movement during measurement. Avoid side-loading the stem, as this can affect accuracy and bearing life. Always zero the indicator at the reference surface before taking readings.