12 mm Ceramic Gauge Ball (Si3N4) 0.003 mm Accuracy, HV1400-1700 Hardness - Metav IndustryLine

Take advantage of the combination of extreme dimensional stability, ceramic wear resistance and laboratory-grade accuracy for reliable reference measurements; order the ceramic gauge ball directly via Metav Werkzeuge or consult the measurement specialists for application advice.

Ceramic gauge ball (Si3N4), 12 mm — 0.003 mm accuracy (Metav IndustryLine)

Ceramic gauge ball (Si3N4) intended as a compact, high-precision reference sphere for gauges, measurement stands and inspection jigs in metrology and quality control.

• 12 mm diameter for precise reference
• Accuracy 0.003 mm for tight tolerances
• Silicon nitride (Si3N4) with HV1400–1700
• Low roughness Ra 0.00001 for smooth contact

Reduce measurement uncertainty with a compact reference sphere

A small, well characterised reference sphere reduces uncertainty in comparative checks and gauge calibration. The 12 mm diameter and 0.003 mm stated accuracy make this sphere suitable where repeatable point contacts are required; the specified tolerance 0.00008 mm ensures the nominal diameter presents minimal scatter. For workshops and inspection benches this translates into faster decision-making in go/no-go checks and stable baseline readings for coordinate measuring procedures. The compact format supports tight fixturing while maintaining reproducible contact geometry.

Engineered for repeatability and long service life

Manufactured from Si3N4 (silicon nitride), the sphere combines low density with high fracture resistance and a surface hardness of HV1400–1700, offering excellent wear performance in frequent-contact applications. Surface finish at Ra 0.00001 minimises micro-asperity influence on contact points, so tactile probes and optical systems encounter consistent interaction. The modest mass (0.08 kg) and robust material behaviour reduce the risk of handling-induced damage while preserving measurement integrity over long-term use, lowering the need for frequent replacement.

Seamless integration into inspection workflows

The sphere functions as a reference element in master rings, three-point supports and precision nests used in dimensional inspection. As a measuring artefact it is useful for comparative verification of probes, repeatability tests and as a reference for small-part gauging. Traceable identification via M318.442 and the compact form factor allow easy storage and rapid deployment on the workshop bench or in the inspection lab. Compatibility with standard metrology fixtures means minimal adaptation effort when introducing this ceramic gauge into existing quality-control sequences.

For assured precision from Metav IndustryLine, contact Metav Werkzeuge in Emmerich to discuss the Ceramic gauge ball (Si3N4) M318.442 and its suitability for the intended measurement task.

Technical Data

• Article number: M318.442
• GTIN: 4054469184418
• Label: Ceramic gauge ball (Si3N4), 12 mm, accuracy 0.003 mm

Numbers / Core technical data

• Diameter: 12 mm
• Accuracy: 0.003 mm
• Diameter tolerance: 0.00008 mm
• Surface roughness Ra: 0.00001
• Hardness: HV1400–1700
• Weight: 0.08 kg

Special features

• Material: Ceramic (Si3N4)
• Application: Gauges, dimensional reference sphere
• Category: Lehren (gauges)
• SKU: M318.442

FAQ

Is the ceramic gauge ball suitable as a reference for probe calibration?
The Ceramic gauge ball (Si3N4) is suitable as a stable reference sphere within probe verification routines and comparative calibration setups where a 12 mm master sphere meets the test requirements.

What level of dimensional precision can be expected from this sphere?
The sphere offers an accuracy of 0.003 mm with a diameter tolerance of 0.00008 mm, enabling tight tolerance checks and reliable repeatability in small-part inspection.

How does the material affect durability and handling?
Made of silicon nitride, the gauge ball combines high surface hardness (HV1400–1700) with low wear characteristics, so M318.442 maintains contact integrity under frequent use and minimises surface degradation.

Can this sphere be used in both workshop and laboratory environments?
Yes; the compact form and high surface finish allow the sphere to serve reliably in workshop inspection benches and in laboratory settings where a small, precise reference element is required.

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