25-50mm Flat Glass Set For Micrometer Calibration 40.62/40.75/40.87/41.00mm Accuracy 0.1µm - Metav IndustryLine

Take advantage of extremely fine flatness and stable geometry to verify small micrometers reliably; the set combines 0.1 µm flatness with a parallelism of 0.006 mm across four gauge plates to support consistent inspection routines. Order the set directly via Metav Werkzeuge or consult our specialists for application advice.

Flat glass set for micrometer verification M318.226 — 0.1 µm flatness, 4-piece precision set (Metav IndustryLine)

The Flat glass set for micrometer verification M318.226 is a four-piece reference kit designed to check and verify micrometers in the 25–50 mm range, providing workshop and inspection stations with stable, high-resolution measurement standards.

• 0.1 µm flatness accuracy
• Four precision glass plates
• Parallelism 0.006 mm
• For micrometers 25–50 mm

Reliable reference for fine micrometrology

This set provides calibrated flatness at a level of 0.1 µm, making it a suitable reference for delicate verification tasks and comparative checks. The four plate thicknesses (40.62, 40.75, 40.87 and 41.00 mm) supply discrete reference points that simplify verification across the typical 25–50 mm micrometer range. By using stable glass standards instead of uncertain artefacts, measurement deviation caused by seating or contact geometry is reduced, which supports repeatable quality control in both small-batch production and precision workshops.

Supports consistent inspection routines and traceability

With a parallelism rating of 0.006 mm, the plates ensure faces remain truly parallel during contact checks, limiting error sources for both internal procedures and incoming inspection. The compact diameter of 30 mm and the four-piece arrangement facilitate quick swapping and minimise handling time, which promotes efficient verification workflows. As a rational investment, these characteristics reduce downtime from uncertain gauges and sharpen process capability documentation for audit situations.

Practical handling: durability and workshop integration

The set is supplied as a coherent four-piece kit that fits standard inspection benches and micrometer stands; the overall mass of the set is 0.5 kg, which makes storage and movement straightforward. The glass material offers stable surface characteristics and is easy to clean after use, so contamination-related errors are minimised. For tasks requiring classification, this kit is placed in the micro class (measurement range up to 100 mm), which aligns it with fine-mechanical and watchmaking applications where minimal deformation and compact gauge lengths are essential.

What this means for day-to-day quality control

Employing these precision gauge plates as part of routine checks provides immediate, measurable improvements in confidence and repeatability. Used as reference artefacts, the plates help to separate instrument drift from process variation, enabling informed decisions on calibration intervals. The clear set structure supports documented inspection steps and simplifies training for technicians new to micrometer verification.

Contact Metav Werkzeuge for tailored advice on integrating the M318.226 flat glass set into current inspection routines and to arrange prompt delivery from our Emmerich facility

Technical data

• SKU: M318.226
• GTIN: 4054469184272
• Category ID: 21170126

Core figures

• Plate thicknesses: 40.62 mm, 40.75 mm, 40.87 mm, 41.00 mm
• Flatness: 0.1 µm
• Parallelism: 0.006 mm
• Diameter: 30 mm
• Weight: 0.5 kg
• Pieces per set: 4

Special features

• Suitable for verification of micrometers 25–50 mm
• Four-piece flat glass set for workshop and inspection use
• Compact diameter for easy handling and placement
• Category: Parallel gauges

FAQ

How is the flatness specification defined for these plates?
The flatness of 0.1 µm for the M318.226 flat glass set refers to the maximum deviation from an ideal plane across the reference face and is the basis for using the plates as high-resolution verification standards.

Can the set be used directly to calibrate a micrometer?
The set provides stable reference thicknesses for verification and comparative checks; the M318.226 kit is intended for inspection and verification rather than as a primary calibration artefact with accredited status unless accompanied by a separate calibration certificate.

Are the plate dimensions suitable for small workshop micrometers?
Yes, the plate thicknesses (40.62 – 41.00 mm) are selected to support verification tasks within the 25–50 mm micrometer range and are compact enough for typical workshop micrometer rests.

What handling precautions are recommended for these glass plates?
Handle the plates with clean gloves, store them in a dust-free environment, and avoid sharp knocks; the M318.226 plates are durable for inspection use but benefit from careful handling to maintain flatness.

Is the parallelism of 0.006 mm significant for routine checks?
Yes, a parallelism of 0.006 mm ensures that contact faces remain aligned during a check, reducing measurement uncertainty when comparing micrometer readings against the glass standards.

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