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

Take advantage of the combination of hardened chrome steel, an 8 mm reference diameter and 0.003 mm calibrated accuracy for repeatable dimensional checks; order directly via Metav Werkzeuge or consult our specialists for application advice.

Gauge Ball Pair M318.418 — 8 mm hardened chrome steel, 0.003 mm accuracy (Metav IndustryLine)

A pair of gauge balls M318.418 designed as high-precision reference spheres for gauge fixtures and laboratory metrology.

• Hardened chrome steel construction
• 8 mm reference diameter
• 0.003 mm calibrated accuracy
• Tight diameter tolerance 0.00008 mm

Precision where repeatability matters

The paired reference spheres deliver consistent dimensional stability for comparative and calibration tasks. With a specified accuracy of 0.003 mm, these reference balls provide a verifiable basis for repeat measurements, improving process control in inspection routines. The tight diameter tolerance (0.00008 mm) reduces uncertainty when used as standards in gauge blocks, fixture set-ups or as reference contacts in coordinate measuring routines. This focus on numerical performance supports quick verification cycles and reliable traceability in quality workflows.

Durable material for minimal deformation

Constructed from hardened chrome steel and hardened to HRC 62, the spheres resist surface wear and local indentation, which preserves roundness under repeated contact. The finely finished surface, with an extremely low surface roughness, means contact points remain consistent and transfer forces predictably during measurements. These characteristics extend service life and reduce the risk of measurement drift caused by material fatigue, so the components remain reliable reference elements over many inspection cycles.

Practical handling and application benefits

Supplied as a set of two, the pair format supports symmetry checks and paired-fixture referencing without additional sourcing. At a total mass of 0.05 kg for the set, the spheres are easy to position and integrate into gauge assemblies or measuring jigs. The compact 8 mm diameter suits both bench-top metrology and fixture-mounted applications where small, high-precision reference points are required. The polished finish and robust chemistry simplify cleaning and maintenance, helping to keep handling routines efficient and contamination risks low.

For precision reference measurements and immediate availability, contact Metav Werkzeuge to request the M318.418 gauge ball pair and to discuss stock, delivery and application support: info@metav-werkzeuge.com | +49 2822 7131930

Technical Data

• SKU: M318.418
• GTIN: 4054469184067
• Manufacturer: Metav IndustryLine

Facts

• Diameter: 8 mm
• Accuracy: 0.003 mm
• Diameter tolerance: 0.00008 mm
• Surface roughness: 0.00001
• Hardness: > HRC 62
• Weight: 0.05 kg
• Pieces per set: 2

Special features

• Material: hardened chrome steel
• Delivered as a paired set for reference use
• Fine-ground, low-roughness finish
• Category: gauges / reference spheres

FAQ

What is the primary use of these gauge balls?
The M318.418 gauge ball pair is intended as high-precision reference spheres for gauge fixtures, comparative checks and dimensional referencing in metrology applications.

Are the spheres suitable for repeated contact with hardened materials?
Yes. The hardened chrome steel construction and a hardness above HRC 62 make the spheres suitable for repeated contact with hard workpieces while preserving roundness.

How precise is the diameter of each sphere?
Each sphere is manufactured to an 8 mm nominal diameter with a diameter tolerance of 0.00008 mm and an accuracy of 0.003 mm, providing a stable reference for inspection tasks.

Can these gauge balls be used in fixture assemblies and CMM probes?
The paired format and compact size make them suitable as reference points in fixtures and for setups involving coordinate measuring equipment, provided the fixture design accommodates an 8 mm sphere.

What routine maintenance is recommended?
Clean the spheres with a lint-free cloth and appropriate solvent to remove contaminants; the polished finish and robust material simplify handling and help maintain measurement consistency.

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