5-20mm Three-Point External Micrometer 0.01mm Graduation Carbide Faces Ratchet, Supplied in Case - Metav IndustryLine

Take advantage of a compact instrument that combines three‑point measurement, carbide measuring faces and a reproducible ratchet stop for reliable profile checks in series inspection; order via Metav Werkzeuge or contact the Metav consultants for application advice.

M309.021 Three‑point screw micrometer — 5–20 mm, 0.01 mm graduation (Metav IndustryLine)

The M309.021 is a three‑point outside screw micrometer designed for accurate measurement of triangular and multi‑edge small parts in precision workshops and quality control labs.

• Three‑point measuring for profile edges
• Carbide measuring faces for long wear life
• 0.01 mm graduation with ±0.005 mm accuracy

Precision where profile measurement is essential

The instrument employs a three‑point measurement arrangement that centres on polygonal cross‑sections, delivering consistent contact on triangular or pentagonal workpieces. With a 0.01 mm graduation and an indicated accuracy of ±0.005 mm, the device separates readable scale resolution from true measurement uncertainty — the fine graduation supports quick read‑outs while the tighter measurement tolerance ensures dependable conformity checks. This combination reduces the need for repeated setups and shortens inspection cycles in production routines.

Durable construction for repeatable results

A ratchet stop guarantees a uniform measuring force, eliminating variability from operator pressure and improving reproducibility across repeated checks. The contact faces are made of carbide, providing abrasion resistance when used on harder materials and maintaining measuring geometry over many cycles. The frame is painted and the measuring drum is matt‑chromed, offering corrosion protection and a low‑glare surface for clearer reading. Classified as a compact, micro‑range instrument with a 5–20 mm span, it is particularly suited to fine‑mechanical and small‑part environments where tool handling and space are limited.

Practical advantages for workshop inspection

This analog screw micrometer focuses on the essentials that streamline quality control: rapid profile verification, robust contact faces and a controlled measuring force that together reduce scrap and rework. The compact dimensions make it an efficient companion in dedicated inspection benches or handheld checks during setup. Supplied ready for use in a protective case for safe transport, the unit supports routine calibration workflows and straightforward integration into established inspection procedures.

For application support or to procure the Metav IndustryLine M309.021 three‑point screw micrometer directly, contact Metav Werkzeuge in Emmerich for tailored advice and reliable delivery.

Technical data

• SKU: M309.021
• GTIN: 4054469117560
• Category: Screw micrometers (Messschrauben)
• Manufacturer: Metav IndustryLine

Facts

• Measuring range: 5–20 mm
• Graduation (reading): 0.01 mm
• Stated accuracy: ±0.005 mm
• Setting increment: 5 mm
• TARIC / customs code: 90173000

Special features

• Three‑point outside measuring
• Carbide measuring faces (HM)
• Ratchet stop for constant measuring force
• Painted frame and matt‑chromed measuring drum
• Analog (nonius) instrument
• Supplied in a protective case
• Suitable for triangular and multi‑edge workpieces

FAQ

What is the measuring range of this micrometer?
The M309.021 screw micrometer measures from 5 mm to 20 mm, making it suitable for micro‑range profile checks.

How precise is the M309.021 in practical use?
The instrument has a graduation of 0.01 mm and a stated measurement accuracy of ±0.005 mm, which supports fine profile assessments and repeatable inspection results.

Are the measuring faces durable for regular workshop use?
Yes, the measuring faces are made of carbide, offering high wear resistance so the M309.021 maintains geometry and reliability during frequent use.

Does the micrometer include features to ensure repeatable measurements?
A ratchet stop is fitted to ensure a consistent measuring force, helping to eliminate variability associated with hand pressure during measurements.

Is the M309.021 delivered ready for safe transport?
The micrometer is supplied in a protective case suitable for transport, ensuring secure handling between workstations or to inspection locations.

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