Mitutoyo 209-937 Internal Electronic Caliper Gage

Product Description

The MITUTOYO 209-937 is an internal electronic caliper gage designed to measure internal groove and bore diameters with digital precision. It covers a measurement range of 20mm to 40mm (approximately 0.79 inches to 1.58 inches) and delivers a resolution of 0.005mm (0.0002 inch), making it well-suited for close-tolerance inspection work. The gage uses a ball-type contact point configuration, which allows it to seat accurately inside grooves and bores. It is intended for use by machinists, quality control technicians, and precision measurement professionals working in production or inspection environments.

This gage is applied where internal groove diameters must be verified quickly and accurately. Typical use cases include inspecting snap ring grooves, retaining ring seats, and similar internal features on machined components. The minimum groove depth accommodation is 7mm, making it practical for shallow internal features. It is well suited for bench inspection, in-process checks on the shop floor, and receiving inspection of machined parts across light manufacturing and precision machining operations.

Key Features

• Internal measurement range: 20mm to 40mm (0.79 inches to 1.58 inches)
• Resolution: 0.005mm (0.0002 inch) for fine tolerance readout
• Ball-type contact points for accurate seating in grooves and bores
• Minimum groove width of 0.0600 inches for narrow internal feature access
• Minimum groove depth: 7mm for shallow feature compatibility
• Digital electronic display for fast, direct reading without interpolation

Compatibility

Designed as an OEM-style internal electronic caliper gage for precision measurement applications requiring digital readout of internal groove and bore diameters in the 20mm to 40mm range.

Installation Notes

This gage is a handheld precision instrument and does not require mechanical installation. Before use, zero the gage per the manufacturer calibration procedure and verify contact points are clean and undamaged. Store the gage in its protective case when not in use to prevent contact point wear and electronic damage. Battery replacement and routine calibration should be performed according to the manufacturer service schedule.