18mm Gauge Ball Pair Hardened Chrome Steel 0.003mm Accuracy, Set of 2 - Metav IndustryLine

Take advantage of the combination of traceable dimensional control, hardened chrome-steel construction and extremely fine diameter tolerance for reliable reference measurements; order the set directly via Metav Werkzeuge or consult our specialists for integration guidance.

Gauge Ball Pair M318.428 — 18 mm, 0.003 mm accuracy (Metav IndustryLine)

A gauge ball pair designed as a compact, high-stability reference for precision gauging, calibration fixtures and tactile probing tasks in inspection environments.

• 18 mm diameter precision spheres
• Accuracy 0.003 mm for reference measurements
• Hardened chrome-steel, >HRC 62

Reliable reference for inspection and calibration

The gauge ball pair M318.428 serves as a compact reference for comparative and calibration work. With a specified accuracy of 0.003 mm and a diameter tolerance of 0.00008 mm, these spheres provide repeatable, measurable benchmarks for gauging rigs, comparative master checks and probe verification. The combination of tight dimensional control and low surface roughness secures consistent contact conditions and reduces measurement scatter when used with tactile probes or master rings.

Robust build that supports consistent results

Manufactured from hardened chrome-steel and rated at >HRC 62, the components resist wear and maintain geometry under repeated use. The high hardness and fine surface roughness improve longevity and stability, so reference geometry remains unchanged across many cycles. For workshops and small inspection labs this translates into fewer re-measurements, lower uncertainty in serial checks and a dependable baseline for roundness or repeatability tests.

Practical integration and handling for metrology tasks

Supplied as a set of two, the pair fits easily into inspection kits and gauge assemblies where paired spheres are used for spacing, centring or as contact standards. The 18 mm diameter is a practical size for tactile probes, comparator set-ups and fixture references, while the low mass supports fast handling without inducing significant thermal drift. Clean contact surfaces before measurement and store the pair in a dry, cushioned container to preserve the specified tolerance of 0.00008 mm and surface condition.

Secure the Metav IndustryLine gauge ball pair with 0.003 mm accuracy from Metav Werkzeuge for dependable reference measurements — contact our consultants for application advice and kit integration.

Technical data

• Article number: M318.428
• GTIN: 4054469184166
• Material: Chromium steel, hardened
• Diameter: 18 mm
• Accuracy: 0.003 mm
• Diameter tolerance: 0.00008 mm
• Surface roughness: 0.00001
• Hardness: >HRC 62
• Weight: 0.08 kg
• Set contents: 2 pieces

Facts

• Diameter (mm): 18
• Accuracy (mm): 0.003
• Diameter tolerance (mm): 0.00008
• Surface roughness: 0.00001
• Weight (kg): 0.08
• Pieces per set: 2

Special features

• Hardened chrome-steel construction
• High wear resistance and dimensional stability
• Designed for reference and gauging applications
• Supplied as a matched pair for comparative tasks

FAQ

What applications are suitable for these gauge balls?
The gauge ball pair M318.428 is suitable for reference measurements, probe verification, fixture benchmarking and comparative gauging in inspection and workshop environments.

Is the material appropriate for repeated tactile probing?
Yes. The hardened chromium steel and hardness >HRC 62 ensure good wear resistance and stable contact behaviour under repeated tactile probing.

How precise are the spheres in relation to typical lab standards?
With an accuracy of 0.003 mm and a diameter tolerance of 0.00008 mm, these spheres provide a stable reference compatible with fine workshop metrology and many laboratory comparison tasks.

How should the pair be stored to maintain accuracy?
Store the matched spheres in a clean, dry and cushioned container to protect contact surfaces and preserve the specified tolerance and surface finish.

Are these spheres sold as a set or individually?
They are supplied as a matched set of two pieces (pair) intended for paired reference and gauging uses.

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