Mitutoyo 12AAC731 Cmm Needle Stylus Zirconia Point

Product Description

The MITUTOYO 12AAC731 is a CMM needle stylus designed for use with coordinate measuring machines in dimensional inspection applications. The stylus features a zirconia point mounted on an aluminum stem, combining lightweight construction with a hard, wear-resistant contact tip. The overall length is 45.60 mm with an effective working length of 37.70 mm and a stem diameter of 1.20 mm. Horizontal mounting orientation makes this stylus suitable for side-probing and hard-to-reach feature measurement. Metrology technicians and quality lab personnel use this type of stylus for high-precision surface contact measurements.

This needle stylus is suited for use in quality control environments where fine-feature inspection is required, including bore edges, slots, grooves, and other geometry that demands a slender probe profile. The horizontal mounting orientation supports applications where the probe must approach a workpiece from the side rather than from above. It is a replacement-style stylus intended for CMM systems that accept standard stylus thread interfaces. Facilities running production metrology or inspection workflows will find this a direct service replacement when existing styli show tip wear or damage.

Key Features

• Zirconia point material provides high hardness and wear resistance for extended service life
• Aluminum stem keeps stylus weight low, reducing dynamic measurement error
• 45.60 mm overall length with 37.70 mm effective working length for deep-reach access
• 1.20 mm stem diameter supports measurement of fine and narrow features
• Horizontal mounting orientation for side-approach probing applications
• Sold individually, compatible with standard CMM stylus replacement protocols

Compatibility

Designed as an OEM-style replacement stylus for CMM systems accepting standard needle stylus configurations with horizontal mounting orientation. Confirm thread interface compatibility with your CMM probe head before installation.

Installation Notes

CMM stylus replacement should be performed by a qualified metrology technician following the CMM manufacturer's stylus change procedure. Power down or pause the CMM and retract the probe head before removing or installing styli. Avoid overtightening the stylus thread, as this can damage the probe head or alter stylus alignment. After installation, perform a full probe qualification or re-qualification routine before resuming inspection work.