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

Take advantage of the combination of hardened chrome steel construction and sub-micron surface quality for repeatable reference and alignment work; the 15 mm diameter spheres with 0.003 mm accuracy deliver reliable results across inspection and tooling tasks. Order the pair via Metav Werkzeuge or consult our specialists for application advice and rapid supply.

Gauge ball pair M318.425 — 15 mm hardened chrome steel, 0.003 mm accuracy

A gauge ball pair M318.425 designed as precision reference spheres for inspection, fixture set-up and alignment tasks in metrology and toolmaking

• Pair of 15 mm gauge balls for reference
• Precision tolerance 0.00008 mm diameter
• Surface finish Ra 0.00001 for smooth contact
• Supplied as a set with accuracy 0.003 mm

Consistent reference geometry for accurate checks

The 15 mm diameter reference spheres provide a stable, repeatable contact geometry that simplifies comparative measurements and alignment procedures. With a declared accuracy of 0.003 mm and a diameter tolerance down to 0.00008 mm, these spheres serve as a trustworthy datum for run‑out tests, probe qualification and assembly verification. The exceptionally low surface roughness (Ra 0.00001) reduces local deformation at contact points and helps maintain measurement consistency when used with optical instruments or touch probes.

Durable material and surface quality for long service life

Manufactured from hardened chrome steel with a hardness greater than HRC 62, the pair resists wear and preserves roundness under repeated contact and loading. This material choice supports stable long‑term use in shopfloor and laboratory settings where repeatability matters. The set weight and compact size make handling straightforward, while the high surface finish minimises friction and contamination build‑up. As a result, calibration intervals are extended and throughput for repetitive inspection tasks is improved.

Practical use in fixtures, CMM checks and tooling set‑ups

Delivered as a two‑piece set, the spheres are suitable for kinematic references, V‑block positioning and comparative gauge setups. The clear numerical specifications allow selection with confidence for shop inspection, quality control benches and fixture verification. When integrated into a measurement routine, these reference spheres reduce uncertainty in positional checks and support faster, more reliable decisions about part conformity and tool condition.

Contact Metav Werkzeuge to discuss how the hardened chrome steel gauge ball pair can support precise alignment and inspection tasks and to request the SKU M318.425 for prompt supply from Emmerich.

Technical data

• SKU: M318.425
• GTIN: 4054469184135
• Set: 2 pieces

Key figures

• Diameter: 15 mm
• Accuracy: 0.003 mm
• Diameter tolerance: 0.00008 mm
• Surface roughness Ra: 0.00001
• Weight: 0.08 kg
• Hardness: >HRC 62

Materials & features

• Material: hardened chrome steel
• Application: reference, alignment, inspection, fixture set‑up

FAQ

What is the intended use for these gauge balls?
These gauge balls from Metav IndustryLine are intended as reference spheres for inspection, fixture positioning and alignment checks in metrology and workshop environments; the pair (SKU M318.425) is suited to comparative and kinematic set‑ups.

How does the stated accuracy relate to practical measurements?
The 0.003 mm accuracy of the M318.425 pair indicates the expected deviation for reference use; combined with the 0.00008 mm diameter tolerance and the Ra 0.00001 surface finish, the spheres offer a stable basis for repeatable probe and run‑out checks.

Can these spheres be used on a CMM or with touch probes?
Yes. The hardened chrome steel construction and fine surface finish make the pair suitable for CMM probe qualification and touch‑probe inspections where consistent contact geometry is required.

Are the spheres suitable for heavy‑duty workshop use?
The >HRC 62 hardness and hardened chrome steel material provide strong wear resistance for routine workshop and inspection tasks, preserving roundness and dimensional stability under repeated use.

What does the supplied set include?
The delivery comprises two precision spheres as a matched set (SKU M318.425), supplied for use as paired reference elements in alignment and inspection applications.

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