19 mm Gauge Ball Pair Hardened Chrome Steel 0.003 mm Accuracy Tolerance 0.00008 mm, Set of 2 - Metav IndustryLine

Take advantage of high measurement fidelity, long-term wear resistance and compact handling for reliable reference measurements in inspection and toolmaking. Order the Precision gauge ball pair directly via Metav Werkzeuge or contact our consultants for application guidance.

Precision gauge ball pair M318.429 — 19 mm, hardened chrome steel, 0.003 mm accuracy (Metav IndustryLine)

The Precision gauge ball pair is a compact reference set designed for dimensional inspection, calibration tasks and roundness checks in metrology and precision engineering.

• 19 mm nominal diameter, ground to tolerance
• Accuracy of 0.003 mm for repeatable references
• Hardened chrome steel for high wear resistance
• Supplied as a set of two spheres

Reliable reference for dimensional inspection

The pair provides a stable measurement reference for comparative checks and alignment tasks. With a specified accuracy of 0.003 mm and a diameter tolerance of 0.00008 mm, the spheres reduce uncertainty when setting up gauges, checking spindles or verifying fixtures. Specified surface quality and dimensional control make these spheres suitable as measurement artefacts in workshop inspection benches and for quick verification tasks on the shop floor.

Durable material and surface finish for repeatable results

Manufactured from hardened chrome steel and featuring hardness above HRC 62, the spheres resist wear during repeated contact measurements. The exceptionally low surface roughness (0.00001 mm) minimises contact variation and helps preserve geometric integrity over time. Consequently, the gauge balls remain a reliable reference even under frequent use, lowering the need for premature replacement and ensuring consistent measurement results.

Practical applications in metrology and quality control

Delivered as a set of two, these spheres are ideal for use as datum points, V‑block mates or as reference artefacts for roundness assessments and ball‑bar checks on coordinate measuring machines. The compact design and low mass (approx. 0.08 kg per set) facilitate easy handling during setup and minimise influence on lightweight fixtures. Their specification supports traceable workshop checks and routine calibration comparisons.

Confidence from a specialised supplier

Metav IndustryLine combines focussed product design with practical workshop support. The M318.429 set complements a broad metrology range and benefits from Metav’s commitment to accessibility and dependable supply. With a long service life and tightly controlled tolerances, the spheres contribute to reduced downtime and more predictable inspection throughput, supporting efficient quality processes in manufacturing environments.

Contact Metav Werkzeuge for tailored advice on integrating the M318.429 precision gauge ball pair into inspection routines — call +49 2822 7131930 or email info@metav-werkzeuge.com for support from our Emmerich team.

Technical data

• Article number: M318.429
• GTIN: 4054469184173
• Material: hardened chrome steel
• Nominal diameter: 19 mm
• Accuracy: 0.003 mm
• Diameter tolerance: 0.00008 mm
• Surface roughness: 0.00001 mm
• Hardness: >HRC 62
• Weight (set): 0.08 kg
• Supplied as: set of 2 spheres

Core specifications

• Diameter: 19 mm
• Accuracy: 0.003 mm
• Diameter tolerance: 0.00008 mm
• Surface roughness: 0.00001 mm
• Hardness: >HRC 62
• Weight: 0.08 kg

Applications / Features

• Reference spheres for calibration and inspection
• Suitable for roundness checks and datum set-ups
• Durable hardened chrome steel construction
• Supplied as a matched pair for comparative measurements
• Compact, easy-to-handle measurement artefact

FAQ

What level of accuracy can be expected from these gauge balls?
The precision gauge ball pair M318.429 is specified with an accuracy of 0.003 mm, making it suitable for precise comparative measurements and many workshop calibration tasks.

Are the spheres suitable for repeated contact measurements?
Yes. The spheres are made from hardened chrome steel with hardness above HRC 62, providing high wear resistance for repeated use.

Can these balls be used as reference artefacts on a CMM?
The matched pair is well suited as reference spheres for CMM set‑ups and datum checks; the tight diameter tolerance and low roughness support reliable CMM probing.

Is the product supplied as a single item or as a set?
The product is supplied as a set of two spheres (M318.429), matched for comparative and datum applications.

What information identifies the product for ordering and traceability?
Use the article number M318.429 or GTIN 4054469184173 when ordering to ensure the correct matched pair is supplied.

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