40–50mm Three-Point Internal Micrometer 0.001mm With Setting Ring And Extension, In Case - Metav IndustryLine

Take advantage of a precise three‑point internal measuring system combined with 1 µm resolution and hardened measuring faces for reproducible internal diameters. Benefit from a dedicated setting ring and a reach extension that simplify blind‑hole inspection. Order directly via Metav Werkzeuge or consult our technical team for integration advice.

Three-point internal micrometer M312.438 — 40–50 mm, 0.001 mm resolution (Metav IndustryLine)

A three‑point internal micrometer for accurate inspection of 40–50 mm bores, supplied with a setting ring and extension

• Three-point internal measurement
• 40–50 mm measuring range
• 0.001 mm resolution for fine control
• Hardened measuring faces for repeatability

Accurate centring and submicron readout for internal bores

The instrument is built around a three‑point measurement principle that centres automatically in the bore, reducing operator influence and yielding stable contact across the full diameter. Combined with a 0.001 mm readout this delivers fine adjustment capability; the specified measurement accuracy of ±0.005 mm provides a clear performance band for quality control tasks. The matt‑chrome‑plated scale and vernier minimise glare, supporting quick, error‑resistant readings in workshop lighting.

Purpose‑designed for blind‑hole and recessed features

Designed to inspect blind‑hole bores, the gauge includes a setting ring (40 mm) for straightforward calibration and an extension (152.4 mm × Ø23.5 mm) to reach recessed or deep cavities without sacrificing stability. The three‑point contact geometry distributes force evenly, so stepped and off‑centre features can be assessed with confidence. This combination of features reduces rework and shortens inspection cycles in production environments.

Robust construction for repeatable workshop use

Hardened measuring faces and a solid build ensure longevity under regular use; the instrument’s mass supports steady handling for precise readings. The matt‑chrome finish protects the scale and vernier from wear while keeping legibility high. For organisations seeking dependable metrology, this tool integrates into standard inspection routines and complements existing gauges and micrometres, helping to standardise measurement quality across the shop floor.

For specialist advice or to secure M312.438 from Metav IndustryLine for immediate integration, contact Metav Werkzeuge and benefit from our workshop expertise and logistics in Emmerich.

Technical data

• Article number: M312.438
• GTIN: 4054469182209
• Manufacturer: Metav IndustryLine

Facts

• Measuring range: 40–50 mm
• Resolution/readout: 0.001 mm
• Measurement accuracy: ±0.005 mm
• Weight: 2.7 kg
• Setting ring: 40 mm
• Extension: 152.4 mm × Ø23.5 mm
• Hardened measuring faces: yes

Special features

• Three‑point internal measurement system
• Suitable for blind‑hole bore measurement
• Scale and vernier matt‑chrome‑plated
• Designed for workshop repeatability and reduced operator influence

FAQ

What measuring range does the micrometer cover?
The micrometer covers an internal range of 40–50 mm, ideal for medium‑sized bores and recesses.

What is the resolution and typical accuracy of this instrument?
Resolution is 0.001 mm with a quoted accuracy of ±0.005 mm, suitable for routine quality control and fine mechanical work.

Can the micrometer measure blind‑hole bores reliably?
Yes. The design is intended for blind‑hole measurements, and the included extension improves access to recessed features.

How is the instrument calibrated and prepared for use?
The gauge is supplied ready for workshop use; a setting ring (40 mm) is provided for quick calibration checks and routine verification.

Which features improve repeatability in production use?
Repeatability is supported by the three‑point contact geometry, hardened measuring faces, and the matt‑chrome scale that reduces reading errors.

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