Mitutoyo 12AAE898 Surface Roughness Stylus Deep Holes

Product Description

The MITUTOYO 12AAE898 is a replacement stylus designed for use with surface roughness testers, specifically configured for deep-hole measurement applications. The stylus contacts the workpiece surface and transmits profile data to the tester, allowing accurate roughness readings in bores, cavities, and other confined geometries that standard styli cannot reliably reach. At 0.5 pounds, the unit is lightweight and straightforward to swap in during field or shop service. Machinists, quality technicians, and precision metrology professionals working in manufacturing or inspection environments are the primary users of this accessory.

This stylus is intended for surface roughness measurement in deep-hole or recessed-surface scenarios where probe geometry is a limiting factor. It is compatible with surface roughness testers as specified by MITUTOYO and is sold as a single-unit replacement accessory. Typical applications include bore surface inspection on engine components, hydraulic cylinders, valve bodies, and similar precision-machined parts where interior surface finish must meet defined Ra or Rz tolerances.

Key Features

• Deep-hole geometry allows access to recessed and bored surfaces that standard styli cannot reach
• Designed as a direct replacement accessory for compatible MITUTOYO surface roughness testers
• Lightweight construction at 0.5 pounds for easy handling and quick stylus changes
• Single-unit packaging suitable for stocking as a service or calibration spare
• Compact form factor: 7 inches long, 4 inches wide, 4 inches tall (packaged dimensions)

Compatibility

Designed for use with MITUTOYO surface roughness testers. Consult the tester documentation or MITUTOYO compatibility references to confirm fitment for your specific model before ordering.

Installation Notes

Stylus replacement is typically performed by a quality technician or metrology specialist familiar with the tester manufacturer guidelines. Power down or disable the tester before removing or installing the stylus to avoid damage to the sensing element. Handle the stylus tip with care, as contact damage will compromise measurement accuracy. Follow the tester manufacturer instructions for stylus seating, retention, and post-installation verification.