30mm Gauge Ball Pair Hardened Chrome Steel 0.003mm Accuracy, 0.00008mm Diameter Tolerance - Metav IndustryLine

The matched pair of precision spheres combines repeatable accuracy, robust construction and compact handling to simplify reference measurements and calibration tasks in production and metrology environments. Benefit from the 0.003 mm nominal accuracy and hardened chrome steel construction for long service life; order the pair directly via Metav Werkzeuge or consult our specialists for application advice.

Pair of gauge balls M318.456 — 30 mm diameter, 0.003 mm accuracy (Metav IndustryLine)

Pair of gauge balls M318.456 are precision reference spheres intended for calibration, comparative checks and dimensional set‑ups in metrology and workshop environments.

• Hardened chrome steel construction
• Precision 0.003 mm accuracy
• Matched pair for reference measurements
• Compact 30 mm diameter spheres

Reliable reference for dimensional control

The matched spheres serve as a compact, traceable reference for comparative and contact measurements where spherical standards are required. With a specified accuracy of 0.003 mm and a diameter of 30 mm, the set provides a stable basis for verifying probe performance, checking gauge positions and establishing repeatable datum points. The stated tolerance on diameter of 0.00008 mm underlines the manufacturing precision; this tight geometrical conformity reduces measurement uncertainty and simplifies the calculation of correction values in routine quality checks.

Durable construction that supports reproducible results

Manufactured from hardened chrome steel, the spheres combine surface hardness (>HRC 62) with an ultra‑fine finish. The very low surface roughness of 0.00001 ensures minimal contact distortion and reduces wear on both the standard and the contacting stylus, which preserves dimensional stability over time. The matched production process results in a pair of spheres whose mutual deviations are controlled, offering reliable comparative measurements and long‑term reproducibility in shop floor and laboratory use.

Practical application and workshop advantages

Small, robust and supplied as a set of two, these precision spheres suit tasks such as probe calibration, setting up V‑block references, comparative checks on coordinate measuring machines and use as spherical end standards for tactile inspection. The compact 30 mm format keeps handling straightforward while providing a large enough surface for repeatable probing. Metav IndustryLine’s local presence in Emmerich combines broad stock availability with a quality filter for the European market, supporting a consistent supply chain for calibration standards and workshop essentials.

For dependable reference spheres from Metav IndustryLine, request the matched gauge‑ball set through Metav Werkzeuge — contact info@metav-werkzeuge.com or call +49 2822 7131930 for specification matching and delivery options.

Technical data

• Article number: M318.456
• SKU: M318.456
• Category: Lehren / Gauges

Facts

• Diameter: 30 mm
• Accuracy: 0.003 mm
• Diameter tolerance: 0.00008 mm
• Surface roughness: 0.00001
• Hardness: >HRC 62
• Weight: 1.3 kg
• Pieces per set: 2

Special features

• Material: hardened chrome steel
• Matched pair for comparative measurements
• Compact, workshop‑friendly size
• Suitable for probe calibration and reference checks

FAQ

What material are the spheres made from?
The pair of gauge balls are manufactured from hardened chrome steel as indicated in the technical data, providing wear resistance and stable geometry.

Are these spheres supplied as a set and how many pieces are included?
Yes — the product is supplied as a matched set consisting of two pieces (set of two) for comparative and reference use.

What level of accuracy and tolerance can be expected from these reference spheres?
The reference spheres are specified with an accuracy of 0.003 mm and a diameter tolerance of 0.00008 mm, suitable for routine metrology and calibration tasks.

Can the spheres be used for probe calibration on a CMM?
The matched pair and fine surface finish make these spheres suitable as tactile reference standards for probe verification and related CMM checks.

Who supplies and is responsible for this product?
Metav IndustryLine supplies the gauge balls; Metav Werkzeuge manages availability and distribution in Europe.

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