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

Benefit from an 8 mm Si3N4 ceramic gauge ball that combines sub‑micrometre surface finish with a 0.003 mm accuracy and exceptional hardness for reproducible reference measurements; order directly via Metav Werkzeuge or consult our specialists for application advice.

Ceramic gauge ball (Si3N4), 8 mm — 0.003 mm accuracy by Metav IndustryLine

The Ceramic gauge ball (Si3N4) serves as a compact, highly stable reference sphere for dimensional checks, calibration and precision gauging across workshop and laboratory environments.

• 8 mm Si3N4 ceramic gauge ball
• Diameter tolerance 0.00008 mm
• Surface roughness Ra 0.00001

Precision that reduces inspection uncertainty

A small reference sphere with a declared accuracy of 0.003 mm provides a direct benefit in traceable measurement chains: fewer correction steps, faster CMM probe verification and more consistent gauge results. The silicon nitride base material (Si3N4) offers a marked advantage in thermal stability and wear resistance compared with softer materials, so reference values remain reliable over repeated use. The combination of tight diameter tolerance and fine surface finish reduces contact‑induced errors and improves reproducibility in routine checks.

Designed for tight spaces and repeatable setups

The compact 8 mm size is ideal for confined assemblies, ball plates and miniature fixtures where a larger reference would be impractical. Its high hardness (HV1400–1700) makes the sphere resistant to deformation from clamping or probing forces, thereby preserving calibration intervals. The smooth finish (Ra 0.00001) lowers friction during touch probe contacts and helps maintain consistent kinematic behaviour, which is particularly useful when integrating the sphere into inspection sequences or quick verification routines.

Low‑maintenance reference with clear traceability

A hard, dense ceramic sphere demands minimal surface treatment and is simple to clean without affecting metrological properties; routine wiping is sufficient to remove residues. Traceability and identification are supported by the clearly assigned article number and GTIN, which simplify inventory and quality documentation. The reference sphere’s modest mass and geometry facilitate quick placement in test rigs and enable predictable handling for repeat measurements without complex fixturing.

Contact Metav Werkzeuge for tailored calibration options and supply from our Emmerich quality hub, delivered with precise documentation and application advice.

Technical Data

• Article number: M318.438
• GTIN: 4054469184388
• Diameter: 8 mm
• Material: Ceramic (Si3N4)
• Weight: 0.08 kg

Core specifications

• Accuracy: 0.003 mm
• Diameter tolerance: 0.00008 mm
• Surface roughness: 0.00001
• Hardness: HV1400–1700

Special features

• Suitable for gauge and reference measurements
• High wear resistance and thermal stability
• Smooth surface finish for low contact error
• Intended for laboratory and workshop use

FAQ

What measurement tasks is this sphere best suited for?
The 8 mm ceramic reference sphere is intended for calibration, probe validation and reference measurements in gauging setups and CMM workflows; the M318.438 gauge ball provides a stable contact surface for these tasks.

How does the material affect performance over time?
Silicon nitride (Si3N4) offers high hardness and thermal stability, so the reference sphere resists wear and thermal distortion better than many metals, helping to keep calibration intervals consistent.

Is the diameter tolerance sufficient for precision metrology?
With a diameter tolerance of 0.00008 mm and an accuracy rating of 0.003 mm, this sphere meets the demands of many calibration and verification applications where reproducible reference geometry is required.

Can the sphere be used with touch probes and optical systems?
Yes; the combination of fine surface finish and robust material makes the sphere suitable for tactile probe contacts and for use as a reference in optical inspection where a stable, low‑friction surface is beneficial.

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