ITP Star Styli with a ruby ball end provides a versatile solution for measuring large diameters and challenging internal features. Specifically designed for long gauging lengths and high-precision work, this 21 mm measuring-length stylus (SCM303005030/180°) uses a robust M3 XXT thread for quick, secure attachment to your probing system.

• End style: Ruby ball tips deliver precise contact with smooth wear characteristics for demanding touchpoints.
• Thread: M3 XXT thread ensures reliable mounting to standard probe housings for quick setup.
• Measuring length: 21 mm design provides sufficient reach while preserving stiffness to minimize bending on long gauging paths.
• Star stylus design: The star configuration enables accurate measurement of large diameters and deep features without compromising rigidity.
• Applications: Ideal for inspecting undercuts, threaded features, and other internal geometries where conventional probes struggle.
• Programmability: A wide range of fixed probe arms supports task-specific measuring programs, including configurations with no stem probe when needed.

This stylus helps you achieve repeatable, high-precision results across complex geometries. The ruby ball end reduces wear on delicate surfaces, while the long gauging length and fixed-arm options let you tailor measurements to each part—minimizing setup time and maximizing inspection throughput. Whether you’re checking bore diameters, thread bases, or feature-to-feature alignment, this star stylus delivers consistent performance in a compact, reliable package.