Mitutoyo 12AAB409 Cmm Needle Stylus 10mm Ball Zirconia

Product Description

The MITUTOYO 12AAB409 is a needle-style CMM stylus designed for use with coordinate measuring machines in dimensional inspection applications. The stylus features a zirconia ball tip measuring 10 mm in diameter mounted on a 1.2 mm diameter aluminum stem. Overall length is 45.6 mm, with an effective working length of 37.70 mm (approximately 1.48 inches). The horizontal mounting orientation makes it well suited for reaching into bores, slots, and recessed features that standard vertical styli cannot access. Metrology technicians and quality control professionals install this stylus when inspecting complex part geometries requiring a low-profile, side-access probe configuration.

This stylus is intended for CMM inspection setups in precision manufacturing, aerospace, automotive, and general metrology environments. Its needle configuration allows access to features with tight clearances where a conventional ball stylus would not fit. The zirconia ball tip provides a hard, wear-resistant contact surface suited for repeated high-cycle inspection routines on ferrous and non-ferrous workpieces. The lightweight aluminum stem helps minimize deflection and keeps the stylus assembly mass low, which is important for maintaining measurement accuracy on sensitive CMM heads.

Key Features

• 10 mm diameter zirconia ball tip for wear-resistant, repeatable contact
• Needle stylus type enables horizontal access to recessed and hard-to-reach features
• 1.2 mm stem diameter supports tight-clearance inspection applications
• Lightweight aluminum stem reduces deflection and minimizes probe head loading
• 45.6 mm overall length with 37.70 mm effective working length
• Horizontal mounting orientation for side-access CMM measurement setups

Compatibility

Designed as an OEM-style replacement CMM needle stylus compatible with coordinate measuring machine stylus systems that accept standard horizontal-mount needle styli. Verify thread size and mounting interface on your CMM probe head before installation.

Installation Notes

CMM styli should be installed by a qualified metrology technician familiar with the probe system in use. Power down or place the CMM in a safe parked position before changing styli to prevent accidental probe crashes. Avoid touching the zirconia ball tip with bare hands, as surface contamination can affect measurement accuracy. After installation, perform a full stylus qualification routine on the CMM to re-establish the tool offset before taking production measurements.