Renishaw A-5000-7796 Cmm Ball Stylus 8mm Ruby M4

Product Description

The RENISHAW A-5000-7796 is a CMM ball stylus designed for coordinate measuring machine probing applications. It features an 8 mm ruby ball tip mounted on a ceramic stem with an overall length of 100 mm and an M4 threaded shank for direct attachment to compatible CMM probe modules. Ruby is the standard material for high-precision stylus balls due to its hardness and dimensional stability, making this stylus well suited for repeated contact scanning and touch-trigger measurements where tip wear and geometric accuracy are critical.

This stylus is intended for use in metrology environments where precise dimensional inspection is performed on machined parts, castings, and assemblies. The M4 thread is a widely used interface in CMM stylus systems, allowing installation on a broad range of probe bodies and extension combinations. It is typically installed by metrology technicians and quality control professionals in manufacturing, aerospace, automotive, and precision machining facilities.

Key Features

• 8 mm ruby ball tip for wear resistance and dimensional stability during contact measurement
• Ceramic stem construction reduces thermal expansion effects and keeps stylus mass low
• 100 mm overall length provides reach for recessed features and deep bores
• M4 threaded shank for compatibility with standard CMM probe bodies and styli systems
• Single-piece package quantity suitable for direct replacement or kit supplementation

Compatibility

Designed as an OEM-style replacement or supplemental stylus for CMM probe systems accepting M4 threaded ball styli.

Installation Notes

CMM styli should be installed and removed by qualified metrology technicians using the appropriate stylus wrench to avoid overtightening the M4 thread. The probe head should be parked or the CMM powered to a safe state before changing styli. Handle the ruby ball tip carefully to avoid chipping, as contact damage will affect measurement accuracy. After installation, perform a stylus qualification routine on the CMM controller before beginning inspection.