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

Take advantage of the combination of hardened chrome steel construction, tight diameter tolerance and a matched delivery to secure reproducible reference points in inspection and fixture tasks. The paired spheres deliver consistent comparative measurements and long service life thanks to high hardness and a super-fine surface finish. Order the gauge ball pair directly via Metav Werkzeuge or consult the technical advisers for application-specific guidance.

Gauge Ball Pair M318.430 — hardened chrome steel, 20 mm, 0.003 mm accuracy (Metav IndustryLine)

The Gauge Ball Pair M318.430 is a precision reference set for gauging, calibration and fixture alignment in inspection and machine construction, designed to provide reproducible contact points and to simplify comparative measurements

• Hardened chrome steel, wear-resistant (>HRC 62)
• Diameter 20 mm with 0.00008 mm tolerance
• Surface roughness Ra 0.00001 for reference accuracy
• Supplied as a matched pair for inspection setups

Consistent reference points for repeatable inspection results

The matched spheres serve as stable contact elements where reproducibility is essential. With a specified accuracy of 0.003 mm and a diameter tolerance of 0.00008 mm, the pair provides highly consistent reference geometry for comparative gauging, fixture location and verification of measuring equipment. The very low surface roughness (Ra 0.00001) reduces local contact variability and supports reliable force transmission during probing or mechanical contact checks. This combination shortens setup time and reduces uncertainty in serial inspection tasks.

Robust material and surface quality for long service life

Manufactured from hardened chrome steel, the balls resist wear in repeated contact cycles; hardness exceeds HRC 62, ensuring dimensional stability under load and extended lifetime in workshop use. The hardened substrate plus precision finishing make the spheres suitable as permanent reference elements in gauges, go/no‑go fixtures or as datum balls for comparative setups. The high hardness and fine finish mitigate profile changes over time, preserving calibration intervals and lowering lifecycle costs compared with softer reference components.

Matched set simplifies integration into workflows

Delivered as a matched pair, the set reduces the need for individual sorting and guarantees that comparative measurements are taken between two mating elements with minimal deviation. The compact format and light mass (0.08 kg) allow easy handling and mounting in inspection fixtures, test benches or portable measurement rigs. The spheres are primarily intended for use in gauging applications and support rapid interchangeability when multiple reference points are required across fixtures or jigs.

Contact Metav Werkzeuge today for application advice or to request compatible accessories and tailored measurement solutions from the Metav IndustryLine catalogue

Technical Data

• Article number: M318.430
• GTIN: 4054469184302
• Material: Chrome steel, hardened
• Diameter: 20 mm
• Accuracy: 0.003 mm
• Diameter tolerance: 0.00008 mm
• Surface roughness Ra: 0.00001
• Hardness: > HRC 62
• Weight: 0.08 kg
• Set content: 2 pieces

Facts

• High repeatability for gauging tasks
• Matched pair delivery
• Compact, portable reference elements

Special features

• Precision-ground spherical geometry
• Suitable as reference contacts in fixtures
• Category: Gauges

FAQ

What applications are suitable for these gauge balls?
The gauge ball pair M318.430 is intended for gauging, fixture datum points and comparative inspection tasks where precise, repeatable contact points are required.

Is the material suitable for heavy-duty workshop use?
Yes. The spheres are made of hardened chrome steel with hardness > HRC 62, providing wear resistance for repeated contact in workshop and shop-floor inspection environments.

How does the matched pair delivery help in measurement setups?
Supplied as a matched pair, the two spheres are already paired to reduce statistical deviation between mating reference points, simplifying fixture setup and comparative measurements.

What level of surface finish and tolerance can be expected?
The pair features a surface roughness Ra 0.00001 and a diameter tolerance of 0.00008 mm, providing very low local contact variability for precise reference use.

Is the set traceable for quality assurance?
Traceability depends on the calibration and documentation required for a specific application; the M318.430 is manufactured to tight production tolerances suitable for integration in calibrated inspection systems

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