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

Benefit from the combination of Si3N4 ceramic construction, tight 0.003 mm accuracy and high hardness for a stable reference standard in inspection routines. Order the 30 mm gauge ball directly via Metav Werkzeuge or consult our specialists for application advice.

Ceramic gauge ball M318.448 — 30 mm reference sphere, Si3N4, 0.003 mm accuracy (Metav IndustryLine)

The Ceramic gauge ball M318.448 is a 30 mm reference sphere made from silicon nitride (Si3N4), designed for use in precision gauging, calibration and metrological inspection in workshop and laboratory environments.

• Si3N4 ceramic, high hardness HV1400–1700
• 30 mm precision sphere with 0.003 mm accuracy
• Diameter tolerance 0.00008 mm for repeatability
• Ultra-fine surface roughness 0.00001 for stability

Ensured measurement confidence with a sub-micron reference

As a compact reference sphere, this gauge ball provides a dependable datum for comparative measurements and calibration tasks. The specified 0.003 mm accuracy and a diameter tolerance of 0.00008 mm reduce systematic error when aligning comparators, calibrating ring gauges or checking spindle run-out. Users benefit from a measurable and reproducible standard that supports quality control protocols and shortens inspection cycles by lowering rework risk.

Ceramic body for wear resistance and thermal stability

Constructed from Si3N4, the sphere combines low density with exceptional mechanical properties: HV1400–1700 hardness and inherent chemical stability. These attributes translate into long-term wear resistance and stable dimensions under typical workshop temperature ranges, which keeps the reference conditionally constant across repeated use. The low mass (0.08 kg) also simplifies handling and reduces stress on kinematic mounts during multi-point setups.

Surface finish that reduces measurement uncertainty

A very fine surface finish, indicated by surface roughness 0.00001, improves contact conditions for tactile probes and optical comparisons alike. The polished surface minimises local form errors and ensures consistent probe contact, which in turn reduces measurement uncertainty during short-range verifications. For dimensionally critical components, this surface quality helps maintain traceable results and facilitates rapid decision-making on the shop floor.

Easy integration into inspection fixtures and gauge sets

The geometry and material characteristics make this gauge ball suitable as a master in small fixture nests, portable gauge sets and as a reference on coordinate measuring machines. Lightweight yet dimensionally stable, the sphere adapts well to precision nests and magnetic or kinematic holders, supporting repeatable seating and straightforward exchange in modular inspection workflows. Its compact size also makes storage and transport within standard cases uncomplicated.

For procurement or tailored advice on integrating the 30 mm ceramic gauge ball into measurement routines, contact Metav Werkzeuge in Emmerich — technical sales and application support are available at info@metav-werkzeuge.com or by phone for local guidance.

Technical data

• Article number: M318.448
• GTIN: 4054469184456
• Material: Si3N4 ceramic
• Diameter: 30 mm
• Accuracy: 0.003 mm

Core data

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

Special features

• Application: Gauging / Reference sphere
• Category: Gauges (Lehren)
• High wear resistance
• Low mass for easy handling

FAQ

What material is the gauge ball made from and why is it used?
The ceramic sphere is made from Si3N4 (silicon nitride); this material offers high hardness and dimensional stability, which is why the M318.448 is suited as a precision reference in gauging and inspection.

How accurate is the 30 mm gauge ball for calibration tasks?
The 30 mm gauge ball provides 0.003 mm accuracy and a diameter tolerance of 0.00008 mm, making it suitable as a short-range reference for comparators, ring gauges and verification fixtures.

Can the gauge ball be used with tactile probes and CMMs?
Yes — the fine surface finish and precise geometry of the gauge ball support consistent probe contact, allowing integration with tactile probes and coordinate measuring machines for reliable comparative measurements.

Does the ceramic construction affect durability in workshop use?
The Si3N4 construction delivers high hardness (HV1400–1700) and wear resistance, so the sphere maintains its form across repeated use in controlled inspection environments.

What is the product identification for ordering or documentation?
The item is listed as Ceramic gauge ball M318.448 (GTIN 4054469184456) from Metav IndustryLine and can be specified in purchasing and quality documentation.

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