Renishaw A-5000-7795 Cmm Ball Stylus 8mm M4 Ruby Ceramic

Product Description

The RENISHAW A-5000-7795 is a CMM ball stylus designed for use with coordinate measuring machines in dimensional inspection and quality control applications. It features an 8 mm ruby ball tip mounted on a ceramic stem, threaded with an M4 connection for compatibility with standard CMM probe systems. The overall assembly length is 50 mm. Ruby is the preferred ball material for CMM styli due to its hardness, roundness consistency, and resistance to wear during repetitive touch-trigger and scanning measurement cycles. The ceramic stem minimizes thermal expansion effects and reduces unwanted deflection, supporting accurate and repeatable measurement results.

This stylus is suited for dimensional inspection work in manufacturing, tooling, and quality assurance environments. It is typically installed on touch-trigger probes and scanning probe heads found in both shop-floor and lab-grade CMM setups. Applications include part geometry verification, bore and surface position measurement, and first-article inspection across a wide range of workpiece materials and sizes. Metrologists, quality technicians, and CMM programmers are the primary users of this component.

Key Features

• 8 mm ruby ball tip provides consistent roundness and wear resistance for high-cycle inspection use
• Ceramic stem reduces thermal growth and stylus deflection for improved measurement repeatability
• 50 mm overall length accommodates moderate-depth feature access without excessive bending moment
• M4 threaded connection fits standard CMM probe modules and stylus extension systems
• Lightweight construction helps maintain probe qualification accuracy over repeated stylus changes

Compatibility

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

Installation Notes

CMM styli should be installed and removed by qualified metrologists or CMM technicians following the probe manufacturer's torque and handling guidelines. Power down or pause the CMM and disengage any active scanning routines before changing styli. Avoid touching the ruby ball with bare hands, as skin oils and debris can affect surface contact and measurement accuracy. After installation, re-qualify the stylus using the CMM's reference sphere qualification routine before running any inspection programs.