425mm Setting Gauge For Micrometer With Thermal Shield, Ball Measuring Faces, Accuracy ±0.005mm - Metav IndustryLine

Take advantage of the combination of high metrological accuracy, thermal protection and compact handling to secure consistent setting results for external micrometers; order the reference gauge directly via Metav Werkzeuge or consult our specialists for application advice.

Setting gauge for micrometers M304.320.4 — 425 mm nominal, ±0.005 mm accuracy

Setting gauge for micrometers M304.320.4 is a precision reference tool for adjusting external micrometers and verifying measurement chains in workshop and inspection environments up to 425 mm.

*425 mm nominal length
*±0.005 mm calibration accuracy
*Spherical measuring faces, D 16 mm
*Thermal protection for stable readings

Dependable reference for external micrometer calibration

This setting gauge serves as a reference standard for external micrometers, offering a nominal length of 425 mm and an accuracy of ±0.005 mm. Such precision places the gauge in the high‑accuracy class suitable for fine inspection tasks where repeatability matters. The stated tolerance corresponds to 5 µm, which helps reduce systematic setting errors when transferring a length value between the reference and the measuring instrument. By using a dedicated reference piece, measurement chains are shortened and the likelihood of cumulative deviations in part inspection is minimised.

Construction tailored to stable measurements under changing temperatures

The gauge is equipped with thermal protection, designed to reduce the influence of ambient temperature fluctuations during short‑term setting operations. The measuring faces are spherical with a diameter of D 16 mm, providing defined point contact for micrometer anvils and limiting positional uncertainty on curved or slightly irregular surfaces. Together these design elements maintain a stable contact geometry and support reproducible settings even when the workshop environment is not thermally ideal.

Practical handling for routine inspection workflows

With a mass of 0.7 kg, the reference piece is compact enough for straightforward handling while remaining substantial enough to sit securely during adjustment procedures. Integration into regular inspection routines is simple: set the micrometer to the gauge, verify the reading, and if necessary apply the calibration offset. The compact format supports portability between workbench and inspection station and allows technicians to keep a verified reference close at hand for frequent checks.

Confidence from a specialist metrology partner

As part of the Metav IndustryLine, this reference gauge reflects the distributor’s commitment to accessible precision. The combination of measurable performance characteristics and a robust design offers a pragmatic solution for workshops and small laboratories that require traceable setting aids without complex system integration. Metav’s quality filter for the European market and broad product range make the tool a reliable addition to a controlled measurement environment.

Contact Metav Werkzeuge in Emmerich for technical advice and to secure the Metav IndustryLine setting gauge; eMail: info@metav-werkzeuge.com, Tel: +49 2822 7131930

Technical data

• Article number: M304.320.4
• GTIN: 4054469116730
• ECLASS: 21170102
• Customs tariff number: 90173000

Dimensions & accuracy

• Nominal length: 425 mm
• Accuracy: ±0.005 mm
• Measuring face diameter: 16 mm
• Weight: 0.7 kg

Features & materials

• Spherical measuring faces
• Thermal protection
• Application: setting gauge for external micrometers
• Category: Accessory (metrology)

FAQ

What is the intended use of this setting gauge?
The setting gauge M304.320.4 is intended as a precision reference for adjusting external micrometers and for short transfer checks within workshop inspection procedures.

How precise is the reference and what does ±0.005 mm mean?
The device provides an accuracy of ±0.005 mm (5 µm); this indicates the maximum deviation that can be expected between the stated nominal length and the actual length under normal conditions.

Are the measuring faces suitable for contact with typical micrometer anvils?
Yes, the spherical measuring faces with a diameter of 16 mm are designed to provide defined point contact compatible with standard micrometer anvil geometries.

Is the gauge stable in typical workshop temperatures?
The unit includes thermal protection to reduce short‑term thermal effects and improve stability during common workshop setting operations.

Can this reference be used for calibration of large micrometers up to 425 mm?
The nominal length of 425 mm makes it suitable as a reference for external micrometers and setting checks up to that length; verify compatibility with specific instrument ranges before use.

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