Mitutoyo 12AAA210 Surface Roughness Gage Extension Rod

Product Description

The MITUTOYO 12AAA210 is an extension rod accessory designed for use with Mitutoyo Surftest portable surface roughness testers. It extends the reach of the detector stylus assembly, allowing technicians to measure surface roughness in recessed, deep, or otherwise difficult-to-access areas. At 1.9685 inches (50 mm) in overall length, the rod provides a compact extension without adding unnecessary bulk to the instrument setup. Metrologists, quality control technicians, and precision machining professionals install this rod as part of their surface measurement workflow when standard stylus reach is insufficient.

This extension rod is intended for use with the Mitutoyo SJ-301 and SJ-210 Surftest portable surface roughness testers in industrial and metrology lab environments. It is suited for applications in manufacturing, inspection, and quality assurance where surface finish measurements must be taken on workpieces with geometric constraints that limit direct stylus access. Note that this rod cannot be used with the SJ-410 series instruments.

Key Features

• Overall length of 1.9685 inches (50 mm) for compact stylus reach extension
• Compatible with SJ-301 and SJ-210 Surftest portable surface roughness testers
• Designed for measurements in recessed or hard-to-reach surface areas
• Not compatible with SJ-410 series instruments
• Sold individually as a single-unit accessory

Compatibility

Compatible with the Mitutoyo SJ-301 and SJ-210 Surftest portable surface roughness testers. Cannot be used with the SJ-410 series.

Installation Notes

This accessory is installed by metrology or quality control technicians familiar with Mitutoyo Surftest instrument operation. Before attaching or removing the extension rod, power down the instrument per the manufacturer operating procedure. Handle the stylus assembly with care to avoid damage to the detector tip. Consult the instrument service manual for proper attachment torque and alignment guidance specific to your tester model.