4 mm Ceramic Si3N4 Gauge Ball, 0.003 mm Accuracy, Ø4 mm Tolerance 0.00008 - Metav IndustryLine

Take advantage of a Si3N4 ceramic sphere with 0.003 mm measurement accuracy and exceptional hardness for long-term repeatability; order the gauge directly via Metav Werkzeuge or ask our consultants for application advice.

Ceramic measuring ball (Si3N4) — 4 mm, 0.003 mm accuracy

The Ceramic measuring ball (Si3N4) is a compact metrology component designed for high‑precision gauging, calibration and fixture use in inspection and workshop environments

• Si3N4 ceramic for high wear resistance
• 0.003 mm measurement accuracy
• Diameter 4 mm with 0.00008 mm tolerance
• Surface roughness Ra 0.00001

Consistent contact and extended service life

Constructed from Si3N4 ceramic, this gauge ball offers a combination of high hardness HV1400–1700 and excellent dimensional stability that reduces wear at contact points. The material choice ensures minimal surface degradation during repeated probing, which keeps tactile and optical probes delivering stable results over time. As a result, maintenance intervals are extended and replacement cycles are reduced, supporting uninterrupted production and fewer process variations.

Traceable precision for quality control

The 0.003 mm accuracy and a diameter tolerance of 0.00008 mm make this measuring sphere suitable for demanding calibration tasks and comparative checks. Such tolerances are meaningful when aligning indicators, calibrating comparison gauges or verifying contact probe performance on CMMs and bench instruments. Low surface roughness contributes to reproducible contact conditions; in practice this means fewer measurement outliers and clearer pass/fail decisions during inspection routines.

Compact format for flexible integration and handling

With a 4 mm diameter and a mass of 0.08 kg, the sphere integrates easily into small fixtures, tactile probe tips and bespoke gauge assemblies where space is limited. The compact format facilitates use in tight bores or on miniature components without compromising contact quality. Its physical characteristics make it an effective building block for modular gauge systems and assembly jigs where consistent point contact is required.

For specification support, compatibility checks or delivery from our Emmerich stock, contact Metav Werkzeuge GmbH — our consultants will advise on the M318.434 ceramic measuring ball and suitable gauging setups.

Technical data

• Article number: M318.434
• GTIN: 4054469184340
• Material: Ceramic (Si3N4)
• Diameter: 4 mm
• Mass: 0.08 kg

Facts

• Measurement accuracy: 0.003 mm
• Diameter tolerance: 0.00008 mm
• Hardness: HV1400–1700
• Surface roughness Ra: 0.00001

Special features

• High wear resistance
• Suited for gauging and calibration tasks
• Category: Gauges (Lehren)

FAQ

What measurement accuracy does this sphere provide?
The ceramic measuring ball provides an accuracy of 0.003 mm, making the M318.434 suitable for precise gauging and calibration tasks.

What material is the sphere made from?
The sphere is manufactured from Si3N4 ceramic, chosen for its hardness and dimensional stability in metrology applications.

Can this measuring ball be used with CMM probes and tactile indicators?
Yes, the M318.434 is suitable for use with tactile probes and bench indicators where a small, repeatable contact point is required.

What are the diameter tolerance and surface quality?
Diameter tolerance is 0.00008 mm and surface roughness is specified as Ra 0.00001, supporting reproducible contact conditions.

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