Starrett 49506 Electronic Drop Indicator 2 Inch Range

Product Description

The STARRETT 49506 is an electronic drop indicator with a 2-inch (50 mm) measurement range, designed for precision dimensional inspection on machine tools, surface plates, and production fixtures. The indicator reads in both inch and metric units on an integrated LCD display, switching between modes without tools. Accuracy is 0.0002 inches (0.004 mm) with a resolution of 0.01 mm, making it suitable for close-tolerance setups. Two CR2032 3V lithium batteries are included. Machinists, tool and die makers, and metrology technicians install and use this instrument in shop and inspection environments.

The 49506 is applied wherever a standard drop-style indicator is needed for measuring runout, flatness, parallelism, or part-to-part variation. The 8 mm stem diameter fits standard indicator holders, magnetic bases, and transfer stands common to machining and inspection setups. It is appropriate for use in both production and job-shop environments where digital readout is preferred over a dial face for faster, unambiguous readings.

Key Features

• 2-inch (50 mm) measurement range with 0.0002-inch accuracy
• Dual-unit readout: inch and metric on LCD display
• 8 mm stem diameter fits standard indicator holders and magnetic bases
• Resolution of 0.01 mm for fine measurement tasks
• Includes two CR2032 3V lithium batteries — ready to use out of the box

Compatibility

Designed as an OEM-style drop indicator compatible with standard 8 mm stem indicator holders, magnetic bases, and surface gauge arms used in general machining and inspection applications.

Installation Notes

Mounting is performed by clamping the 8 mm stem into an indicator holder or magnetic base arm. Ensure the clamp screw is snug but not overtightened to avoid damaging the stem. When using the indicator on powered machine tools, confirm the spindle is stopped and the machine is in a safe state before zeroing or repositioning. Handle the contact point and stem carefully — drop indicators are precision instruments and can lose calibration if struck or dropped.