Mitutoyo 12AAA221 Magnetic Stand Adapter SJ-301 SJ-210

Product Description

The MITUTOYO 12AAA221 is a magnetic stand adapter designed for use with Mitutoyo Surftest portable surface roughness testers. This accessory mounts the roughness gage detector to a magnetic stand, enabling stable, hands-free positioning during surface finish measurements. The adapter measures 0.315 inches in overall diameter and 0.315 inches in overall length, making it a compact interface component. It is installed by metrology technicians and quality control professionals working in machine shops, manufacturing facilities, and inspection labs where repeatable surface texture readings are required.

This adapter is used when a Surftest portable surface roughness tester must be held stationary on a magnetic stand rather than hand-held or bench-mounted. Typical applications include production floor inspection, incoming material verification, and comparative surface finish analysis on ferrous workpieces or fixturing. The small diameter allows the adapter to fit into standard magnetic stand collets or holders without modification.

Key Features

• Designed specifically for Mitutoyo Surftest portable surface roughness testers
• Compact 0.315-inch diameter fits standard magnetic stand collet holders
• Enables stable, hands-free detector positioning for repeatable measurements
• Accessory type: Magnetic Stand Adapter for direct gage-to-stand interface
• Package quantity of 1 — sold as a single unit

Compatibility

Designed for use with the Mitutoyo SJ-301 and SJ-210 Surftest portable surface roughness testers.

Installation Notes

Installation is performed by metrology or quality control technicians familiar with surface roughness measurement equipment. Before attaching or removing the adapter, ensure the roughness tester is powered off and the detector stylus is retracted or protected to prevent damage. Seat the adapter fully into the magnetic stand holder before energizing the magnet base. Follow the instrument manufacturer guidelines for stylus orientation and stand placement to avoid measurement error.