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

Take advantage of hardened chrome steel, 23 mm diameter and 0.003 mm accuracy to ensure repeatable reference measurements and long service life; order the matched pair directly via Metav Werkzeuge or request advice from our technical consultants.

Gauge ball pair — 23 mm hardened chrome steel, 0.003 mm accuracy (Metav IndustryLine)

A gauge ball pair designed as precision reference spheres for calibration, alignment and comparative measurements in metrology and gaging applications.

• Hardened chrome steel construction
• 23 mm diameter with 0.003 mm accuracy
• Surface roughness Ra 0.00001 mm
• Supplied as a matched pair

Precision that secures traceable measurements

The pair functions as compact reference spheres for calibration tasks where repeatability is critical. With a declared accuracy of 0.003 mm and a diameter tolerance of 0.00008 mm, the spheres provide a stable baseline for comparative checks, probe verification and small-part alignment. Their tight tolerances reduce systematic error during setup and enable consistent outcomes when used with coordinate measuring machines, optical comparators or tactile probe systems. The matched nature of the set improves comparative certainty when two-point references are required.

Hard-wearing finish for sustained reproducibility

Constructed from hardened chrome steel with hardness exceeding HRC 62, the spheres offer high wear resistance and dimensional stability under regular use. The polished surface achieves Ra 0.00001 mm, minimising contact variability and improving repeatability in touch-probe interactions. These material and surface properties translate into lower maintenance needs and predictable service life, reducing downtime in routine inspection cycles and protecting the investment in calibration artefacts.

Practical use and compatibility in inspection workflows

Supplied as a matched set of two, the pair suits a range of metrological roles: reference points for fixture mounting, datum spheres for runout and concentricity checks, and comparative standards for quick in‑shop verification. The compact 23 mm size balances handling convenience with adequate contact area for robust probing. Lightweight yet stable, the matched spheres integrate seamlessly into calibration benches, CMM routines and manual gaging stations, where rapid, reproducible checks are required without extensive setup.

Contact Metav Werkzeuge for tailored advice on using matched gauge spheres in calibration routines — Metav IndustryLine supplies the M318.453 matched pair from Emmerich; email info@metav-werkzeuge.com or call +49 2822 7131930 for specification support

Technical data

• Article number: M318.453
• GTIN: 4054469184210
• eClass: 21170133

Dimensions & measurable data

• Diameter: 23 mm
• Declared accuracy: 0.003 mm
• Diameter tolerance: 0.00008 mm
• Surface roughness (Ra): 0.00001 mm
• Weight (pair): 0.2 kg
• Hardness: > HRC 62

Materials & features

• Material: hardened chrome steel
• Supplied as matched pair (2 pieces)
• Category: Gauges / Calibration spheres
• Suitable for probe verification and reference measurements

FAQ

What measurement tasks are best suited to these spheres? These gauge ball pair reference spheres from Metav IndustryLine are ideal for probe verification, datum creation, runout checks and comparative measurements in laboratory and workshop environments.

How precise are the spheres for CMM use? The matched pair offers a declared accuracy of 0.003 mm and a diameter tolerance of 0.00008 mm, which supports reliable use as reference artefacts on CMMs and during tactile probing routines.

What material and hardness are specified for long-term use? Made from hardened chrome steel with hardness above HRC 62, the spheres provide the wear resistance and dimensional stability needed for repeated contact measurements.

Are the spheres supplied as a set and what is the SKU? Yes, the product is supplied as a matched set of two spheres; the SKU is M318.453 and the set is intended for comparative and reference applications.

Can these spheres be used for fixture alignment and runout checks? Yes, the compact 23 mm gauge ball pair is well suited for fixture alignment and runout/concentricity measurements where compact reference points are required.

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