7mm Gauge Ball Pair, Hardened Chrome Steel, 0.003mm Accuracy, 0.00008mm Diameter Tolerance - Metav IndustryLine

Take advantage of the combination of 7 mm diameter, 0.003 mm accuracy and hardened chrome‑steel construction for dependable reference measurements in inspection and calibration. Order the gauge balls directly via Metav Werkzeuge or ask our consultants for application advice and delivery information.

Gauge Ball Pair M318.417 — 7 mm hardened chrome steel, 0.003 mm accuracy (Metav IndustryLine)

A gauge ball pair M318.417 designed for high‑precision dimensional checks, reference measurements and alignment tasks in metrology and inspection.

• Hardened chrome steel > HRC 62
• Matched pair, diameter 7 mm
• High precision: 0.003 mm accuracy
• Diameter tolerance 0.00008 mm
• Ultra‑smooth surface Ra 0.00001

Precision where reproducibility matters

The matched balls provide a defined, repeatable contact geometry that reduces setup variation and measurement uncertainty. With an accuracy of 0.003 mm and a diameter tolerance of 0.00008 mm, the set serves as a measurable reference for comparative checks, instrument verification and kinematic seating. The numerical specifications mean that deviations remain within tight, quantifiable limits, which supports process control and reduces the need for repeated rework.

Durable material for long service life

Manufactured from hardened chrome steel, the balls combine surface hardness and corrosion resistance for sustained performance in metrological environments. A hardness rating of > HRC 62 limits wear during repeated contact cycles, while the ultra‑smooth surface finish (Ra 0.00001) minimises micro‑asperity interaction and ensures low friction seating. These material properties translate into fewer measurement drifts over time and a longer interval between replacements.

Ready for integration in inspection workflows

The paired configuration and small 7 mm diameter make the set suitable for plug gauges, comparative masters, probe testing and calibration rigs where compact, high‑precision references are required. Delivered as a matched set of two, the balls ease mounting in fixtures and allow symmetrical reference points for alignment tasks. The combination of tight tolerance and matched pairing supports consistent results when used with tactile probes, optical comparators or gauge blocks.

Confidence through traceable quality and support

Production under a defined quality process ensures consistent dimensional integrity and surface condition. Backed by Metav’s position as a precision partner, the product benefits from a European quality filter based in Emmerich that simplifies procurement and aftermarket advice. The familiar workshop supply chain and technical consultation options help bridge the gap between technical requirements and practical application for both industry and trade.

For application recommendations or to request a quotation for this gauge ball pair, contact Metav Werkzeuge for technical guidance and delivery from Emmerich.

Technical Data

• Article number: M318.417
• GTIN: 4054469184050
• SKU: M318.417

Facts

• Diameter: 7 mm
• Accuracy: 0.003 mm
• Diameter tolerance: 0.00008 mm
• Surface roughness: 0.00001
• Hardness: > HRC 62
• Weight: 0.05 kg

Special features

• Material: hardened chrome steel
• Set configuration: matched pair (2 pieces)
• Application: gauges / inspection / reference measurements
• Category: Lehren (gauges)

FAQ

What are the nominal size and accuracy of the balls?
The gauge ball pair M318.417 has a nominal diameter of 7 mm and an accuracy of 0.003 mm, specified for use as a reference in inspection and calibration tasks.

Can these balls be used as a reference for gauge calibration?
Yes, the matched pair is intended for reference and alignment work; the tight diameter tolerance of 0.00008 mm supports comparative checks and kinematic seating in calibration setups.

What material are the balls made from and how hard are they?
The balls are made of hardened chrome steel with a hardness greater than HRC 62, providing wear resistance suitable for repeated measurement cycles.

Are the balls supplied as a matched set and how many pieces are included?
The product is supplied as a set of two matched balls, configured to provide consistent reference points for inspection fixtures and measuring devices.

What surface finish and measurement reproducibility can be expected?
The gauge balls feature an ultra‑smooth surface (0.00001), which reduces contact variability and helps maintain reproducible measurement results.

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