25mm Gauge Ball Pair, Chromed Hardened Steel, 0.003mm Accuracy, 0.00008mm Diameter Tolerance - Metav IndustryLine

Take advantage of a compact 25 mm reference that combines hardened chrome steel resilience with micrometre-grade precision (0.003 mm), ensuring reproducible gauge and fixture set‑ups; order the measuring ball pair directly via Metav Werkzeuge or consult our specialists for application advice.

Measuring Ball Pair M318.455 — 25 mm hardened chrome steel, 0.003 mm accuracy (Metav IndustryLine)

A Measuring Ball Pair designed as a compact, high‑precision reference for gauges, fixture alignment and CMM setups in inspection and workshop environments.

• Hardened chrome steel construction
• 25 mm diameter for compact references
• 0.003 mm nominal accuracy
• Supplied as a matched pair for gauges

Precise reference for inspection and setup

The matched pair serves as a stable reference for comparative measurements and gauge block alignment, offering a nominal accuracy of 0.003 mm that reduces uncertainty in repeat measurements. With a diameter of 25 mm, the spheres provide a balance between handling convenience and contact stability; the fine geometric tolerances minimise probing variability during CMM runs or comparator checks, which in turn contributes to faster setup and fewer retests.

Built to last for repeatable measurements

Manufactured from hardened chrome steel and specified at >HRC 62, the spheres resist deformation under repeated contact and maintain form across cycles of use. The exceptionally fine surface finish (surface roughness approx. 0.00001 mm) supports reliable contact points for tactile probes and optical sensors alike. Supplied as a matched pair, the components are paired to each other to reduce systematic offset when used as opposing references in fixtures.

Smooth integration into metrology workflows

As compact reference spheres, these items slot into existing gauge sets, fixture bases or portable inspection rigs without extensive modification. The tight dimensional control (diameter tolerance 0.00008 mm) makes them suitable for precision comparative tasks, repeatable datum establishment and verification of spherical probe calibration. Their modest mass and compact size simplify handling while supporting consistent measurement protocols across shifts and operators.

Contact Metav Werkzeuge for tailored advice or to place an order for the Metav IndustryLine measuring ball pair — email info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: M318.455
• GTIN: 4054469184319
• Brand: Metav IndustryLine

Facts

• Diameter: 25 mm
• Nominal accuracy: 0.003 mm
• Diameter tolerance: 0.00008 mm
• Surface roughness: 0.00001 mm
• Hardness: > HRC 62
• Weight (set): 0.2 kg
• Pieces per set: 2

Special features

• Material: hardened chrome steel
• Matched pair for gauge and fixture use
• Category: Gauges (Lehren)
• Compact reference for CMM, comparators and fixtures

FAQ

What are the exact dimensions and accuracy of the spheres?
The measuring ball pair (Metav IndustryLine, SKU M318.455) has a diameter of 25 mm and a nominal accuracy of 0.003 mm, with a diameter tolerance of 0.00008 mm.

Which applications are the spheres intended for?
These reference spheres are suitable for gauge block alignment, fixture datum points, comparator checks and use as reference objects in CMM programmes.

What material and hardness are specified?
The pair is produced from hardened chrome steel with a hardness greater than HRC 62, providing dimensional stability under repeated contact.

Is a calibration certificate supplied with the set?
The product is supplied as a matched set of two spheres; standard delivery does not include an ISO 17025 calibration certificate.

How does the matched pairing benefit measurement tasks?
Matched pairing reduces differential error between the two spheres when used as opposing references, improving repeatability in fixture alignment and comparative measurement setups.

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