Mitutoyo 12AAB403 Surface Roughness Gage Stylus

Product Description

The MITUTOYO 12AAB403 is a replacement stylus designed for use with Mitutoyo surface roughness gages and profilometers. The stylus serves as the primary sensing element in surface texture measurement, physically tracing a workpiece surface and transmitting data to the instrument for Ra, Rz, and other roughness parameter calculations. It features a 90-degree included angle and a 5.00 micrometer tip radius, both critical values that define measurement capability and contact geometry. Licensed metrology technicians and calibration lab personnel are the typical end users. The part ships as a single unit and is a direct OEM-specification accessory.

This stylus is intended for professional surface measurement instruments used in manufacturing quality control, tool and die inspection, and calibration environments. It fits a broad range of Mitutoyo roughness testers and form measurement systems. Compatible instruments include the SJ-400, SJ-500, SV-2100, SV-3100, SV-3000CNC, SV-M3000CNC, SV-C3100, SV-C4100, SV-C3100CNC, and SV-C4100CNC. These systems are found in both production floor and laboratory settings across aerospace, automotive, and precision machining industries.

Key Features

• 90-degree stylus angle for standard surface roughness measurement per common metrology protocols
• 5.00 micrometer tip radius for fine surface texture detection
• Overall length of 44.70 mm for proper reach and instrument fit
• Overall diameter of 2.40 mm with a depth of 7.60 mm for secure mounting in compatible instrument shanks
• OEM-specification replacement maintaining original instrument accuracy
• Single-unit packaging with a minimum order quantity of one

Compatibility

Compatible with the following Mitutoyo instruments: SJ-400, SJ-500, SV-2100, SV-3100, SV-3000CNC, SV-M3000CNC, SV-C3100, SV-C4100, SV-C3100CNC, and SV-C4100CNC roughness testers and profilometers.

Installation Notes

Stylus replacement should be performed by a qualified metrology technician or calibration professional. Power down the instrument before removing or installing the stylus to avoid sensor damage. Handle the stylus tip with care to prevent contamination or mechanical damage, as tip condition directly affects measurement accuracy. After installation, perform a calibration verification using a certified roughness reference specimen before returning the instrument to service.