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

Robust, hardened chrome‑steel gauge balls with 0.003 mm positional accuracy and a submicron surface finish deliver reliable reference points for small‑part inspection and probe calibration; their HRC >62 hardness ensures excellent wear resistance under repeated contact. Order the gauge ball pair directly via Metav Werkzeuge or ask our consultants if needed.

Gauge Ball Pair M318.414 – 4 mm, hardened chrome steel, 0.003 mm accuracy

The gauge ball pair M318.414 is a precision reference for dimensional inspection, probing and calibration tasks in metrology and quality‑control workshops.

• Hardened chrome‑steel, HRC >62
• Diameter 4 mm, precision gauge spheres
• Accuracy 0.003 mm for reference measurements
• Supplied as a two‑piece set

Precision that keeps measurement reliable

Manufactured as a compact reference, these gauge spheres combine a 4 mm diameter with a declared accuracy of 0.003 mm, making them suitable as control artefacts for small‑scale inspections and tactile probe checks. The tight diameter tolerance of 0.00008 mm and an ultra‑smooth surface roughness of 0.00001 mm reduce measurement noise and support reproducible contact conditions; this is particularly valuable when validating probe repeatability on coordinate measuring machines or checking stylus calibration. The compact geometry also minimises contact area distortion, translating material properties into predictable measurement behaviour.

Built for wear resistance and consistent repeatability

The choice of hardened chrome steel and a hardness rating above HRC 62 prioritises long‑term durability where repeated probing or mechanical contact occurs. High hardness reduces plastic deformation and preserves spherical geometry, which in turn maintains dimensional integrity across many cycles. For workshops that rely on frequent comparative checks, this wear resistance lowers the need for frequent replacements and helps preserve the calibration state of inspection equipment. The result is stable metrology performance and fewer interruptions to production‑control routines.

Practical integration into inspection workflows

Supplied as a two‑piece set, the pair serves as a convenient reference for comparative measurements, fixture set‑up and spot checks of probe systems or micro‑alignment tools. The small mass and 4 mm diameter make the pair easy to position in jigs, on kinematic mounts or under probe tips without introducing significant inertia. Where space is limited or workpieces are miniature, these spheres function as reliable datum points and aid in establishing traceable measurement chains. The compact reference pair supports efficient quality checks and helps technicians reach decisions faster with objective, repeatable data.

Discuss the M318.414 gauge ball pair with Metav Werkzeuge to align this hardened 4 mm reference solution with existing probe and inspection routines

Technical data

• Article number: M318.414
• GTIN: 4054469184029
• Material: Hardened chrome steel
• Diameter: 4 mm
• Accuracy: 0.003 mm
• Hardness: >HRC 62
• Surface roughness: 0.00001 mm
• Tolerance (diameter): 0.00008 mm
• Pieces per set: 2
• Weight: 0.05 kg

Facts

• Diameter: 4 mm
• Accuracy: 0.003 mm
• Tolerance: 0.00008 mm
• Surface roughness: 0.00001 mm
• Hardness: >HRC 62
• Weight: 0.05 kg
• Pieces per set: 2

Special features

• Hardened chrome steel construction
• Supplied as a pair for comparative use
• Designed as a precision reference for inspection and probing
• GTIN and SKU for traceability and ordering

FAQ

What are the primary uses for these gauge balls?
The gauge ball pair M318.414 from Metav IndustryLine is intended as a precision reference for tactile probe checks, fixture set‑up and small‑part inspection where compact, repeatable datum points are required.

Can these spheres be used on coordinate measuring machines (CMMs)?
Yes; the accuracy of 0.003 mm, combined with the controlled surface finish and tight diameter tolerance, makes the pair suitable as short‑range reference artefacts for CMM probe verification and comparative probe tests.

How does the material choice affect long‑term use?
The hardened chrome‑steel composition and HRC >62 rating give high wear resistance, preserving spherical form under repeated contacts and helping to maintain consistent measurement behaviour over time.

Are the balls supplied individually or as a set?
The product is supplied as a two‑piece set, which simplifies comparative checks and fixture alignment without the need to source matching spheres separately.

What cleaning or handling precautions are recommended?
Handle the spheres with clean, lint‑free gloves or tweezers to prevent contamination; clean with a soft, lint‑free cloth and avoid aggressive chemicals that could damage the surface finish.

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