25mm Ceramic Gauge Ball SI3N4, Accuracy 0.003mm, Diameter Tolerance 0.00008mm - Metav IndustryLine

Take advantage of the combination of ceramic stability, sub‑micron accuracy and high hardness for reliable reference measurements on the shop floor and in the lab; order directly via Metav Werkzeuge or consult our specialists for application advice.

Measurement Ball M318.447 — Ceramic (Si3N4), 25 mm, 0.003 mm accuracy (Metav IndustryLine)

The Measurement Ball M318.447 is a 25 mm ceramic gauge ball designed for high‑precision dimensional checks and calibration tasks in metrology and inspection environments.

• 25 mm Si3N4 ceramic gauge ball
• Accuracy 0.003 mm for precise calibration
• High hardness HV1400–1700 resists wear

Consistent sub‑micron reference for calibration and checks

The gauge sphere offers a verified accuracy of 0.003 mm, making it suitable as a stable reference in comparative measurements and calibration routines. With a diameter of 25 mm and a tight diameter tolerance of 0.00008 mm, the part provides a reproducible datum for contact probes and tactile systems. The numeric specification supports rational decision‑making: select this sphere where repeatability and traceable dimensional references are required rather than estimating with lesser components.

Material advantages that reduce drift and wear

Manufactured from Si3N4 ceramic, the sphere combines low density with outstanding mechanical properties. The high hardness (HV1400–1700) and excellent wear resistance mean fewer surface alterations over time, which translates into longer intervals between verifications. Thermal stability and low coefficient of expansion of the ceramic material reduce measurement drift in variable workshop conditions, so the reference sphere retains its geometry during routine use and handling.

Practical use and integration in workshop metrology

The compact, precision surface (surface roughness 0.00001 mm) and a mass of 0.08 kg make the gauge sphere easy to position and use with coordinate measuring machines, tactile probes and manual comparators. Its repeatable geometry supports reference setups, ball‑plate calibrations and probe qualification; the robust ceramic composition is compatible with demanding inspection workflows. The component’s GTIN and clear technical data enable straightforward inventory and quality‑management documentation in production environments.

For a dependable ceramic reference sphere from Metav IndustryLine, contact Metav Werkzeuge in Emmerich to discuss specifications and procurement tailored to metrology requirements

Technical data

• Article number: M318.447
• GTIN: 4054469184449
• Label: Messkugel aus Keramik (SI3N4), 25 mm Genauigkeit 0,003 mm

Facts

• Diameter: 25 mm
• Accuracy: 0.003 mm
• Diameter tolerance: 0.00008 mm
• Surface roughness: 0.00001 mm
• Weight: 0.08 kg
• Hardness: HV1400–1700

Special features

• Material: Ceramic (Si3N4)
• Category: Gauges (Lehren)
• ECLASS: 21170133
• SKU: M318.447

FAQ

What materials is this gauge ball made from and why is that important?
The measurement ball is made from Si3N4 ceramic, which gives the M318.447 superior hardness and thermal stability compared with many metallic spheres; these properties help maintain dimensional stability during use.

Can this sphere be used for probe qualification on a CMM?
Yes. The 25 mm ceramic gauge ball and its 0.003 mm accuracy are suitable for tactile probe checks and reference measurements on coordinate measuring machines.

How tight is the diameter specification for this product?
The product features a diameter tolerance of 0.00008 mm, providing a highly reproducible reference for calibrated inspection setups.

Is the surface finish suitable for sensitive contact measurements?
The sphere’s surface roughness of 0.00001 mm ensures a smooth contact interface, reducing probe wear and supporting consistent measurement transfer.

Which applications are typical for this type of gauge ball?
Typical uses include probe calibration, reference measurements, component inspection and comparative gauging in both workshop and laboratory metrology.

Manufacturer / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; info@metav-werkzeuge.com