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

Combine high geometric fidelity, wear resistance and compact form factor to secure reproducible reference measurements. The pair is ready for immediate use in calibration benches and inspection fixtures — order directly via Metav Werkzeuge or contact our consultants for specification support.

Pair of precision gauge balls M318.427 — 17 mm, 0.003 mm accuracy (Metav IndustryLine)

A pair of precision gauge balls M318.427 for reference measurements, calibration tasks and fixture alignment in metrology and inspection environments.

• 17 mm precision gauge balls
• Diameter tolerance 0.00008 mm
• Hardened chrome steel, >HRC 62

Dependable accuracy for reference work

The pair delivers a declared accuracy of 0.003 mm, making it suitable as a reference artefact for comparative checks and bench calibration. Thanks to the compact 17 mm diameter, the components provide stable point contact on tactile probes and optical comparators, helping to reduce uncertainty in repeat measurements. The tight diameter tolerance of 0.00008 mm ensures consistent contact geometry, which simplifies interpretation of deviation reports and shortens inspection cycles.

Robust material and surface quality for long service life

Manufactured from hardened chrome steel with hardness above HRC 62, the spheres resist wear under repeated contact loads, maintaining form accuracy through many measurement cycles. The very low surface roughness Ra 0.00001 supports reliable probe touch and reduces surface-induced variation when used as a datum or reference point. These material and finish properties together contribute to predictable instrument performance and fewer re-measurements, supporting productivity in production and quality control.

Practical handling, traceability and integration into workflows

Supplied as a set of two, the balls enable quick comparative checks and fixture setting without additional accessories. The modest combined mass (0.08 kg) allows straightforward placement on stands or adapters used in laboratories and shop-floor inspection stations. The item is identifiable by SKU M318.427 and GTIN 4054469184159, facilitating inventory control and documentation. For traceable routines, these spheres act as compact reference standards that integrate with coordinate measuring machines and gauge blocks to validate probe systems and alignments.

For traceable reference standards from Metav IndustryLine, contact Metav Werkzeuge in Emmerich to specify the right gauge ball set and arrange fast delivery or technical clarification

Technical data

• SKU: M318.427
• GTIN: 4054469184159
• Designation: Pair of precision gauge balls

Core specifications

• Diameter: 17 mm
• Accuracy: 0.003 mm
• Diameter tolerance: 0.00008 mm
• Weight: 0.08 kg
• Hardness: >HRC 62
• Surface roughness Ra: 0.00001

Materials & features

• Material: Chrome steel, hardened
• Supplied as: Set of two balls
• Category: Gauges / Inspection

FAQ

Are these balls suitable as a tactile reference on a CMM?
Yes. The M318.427 pair is suitable for use as compact tactile reference spheres on coordinate measuring machines, providing a defined contact geometry and tight dimensional tolerance.

What does the stated accuracy of 0.003 mm mean in practice?
An accuracy of 0.003 mm indicates the maximum permissible deviation from the nominal diameter for each sphere; this supports reliable reference checks and reduces uncertainty in comparative measurements.

Can these gauge balls withstand repeated probe contacts?
The hardened chrome steel construction with hardness above HRC 62 and the very fine surface finish are chosen to provide long-term resistance to wear under normal inspection use.

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