20-50mm Three-Point Internal Measuring Set 0.001 mm With Setting Ring And Extension, In Case - Metav IndustryLine

Take advantage of exceptional centring and sub‑micron indication together with practical workshop accessories for reliable blind‑bore measurement. Combine the high 0.001 mm resolution, robust matt chrome‑plated scale and included setting ring and extension to speed up inspection routines. Order the set directly via Metav Werkzeuge or consult our specialists for application advice.

Three-point internal micrometre set M312.486 – 20–50 mm, 0.001 mm resolution (Metav IndustryLine)

A Three-point internal micrometre set M312.486 designed for precise measurement of blind holes and internal diameters in precision engineering and toolmaking

• High resolution 0.001 mm readout
• Range 20–50 mm for blind bores
• Includes setting ring and extension

Precision where internal diameters count

The three‑point internal micrometre set delivers centring and repeatability that single‑point instruments cannot match. Using the three‑point principle, the measuring anvils align concentrically with the bore, reducing eccentricity and averaging out local form deviations. The instrument offers a 0.001 mm graduation and an indicated accuracy of ±0.005 mm, which makes it suitable for demanding inspection tasks in toolrooms and quality control stations where consistent reproducibility is required. The compact measuring heads are particularly effective for shallow or blind bores that resist conventional calliper methods.

Designed for efficient setup and secure handling

The set includes a setting ring (25 mm and 40 mm) and a dedicated extension (150 x Ø15.8 mm) so that measuring ranges and access limitations can be handled without improvised workarounds. The scale and vernier are matt chrome‑plated, reducing glare under workshop lighting and helping with rapid, fatigue‑free readings. Because the set is supplied as a matched kit, calibration drift between components is minimised and setup time is reduced, which translates into faster throughput on repetitive inspection tasks and fewer process interruptions.

Built for workshop routines and robust use

Delivered as a comprehensive set of measuring heads and accessories, this solution covers the typical 20–50 mm interval used in small to medium‑sized components. The configuration is optimised for blind‑hole measurement and general internal diameter checks in precision engineering, mouldmaking and maintenance departments. The construction of the scale and vernier supports daily use in a shop environment, and the included accessories avoid improvised extensions that can compromise accuracy. The set composition and clear specification simplify inventory and tool standardisation across inspection benches.

For reliable blind‑bore measurement choose the Metav IndustryLine three‑point internal micrometre set and contact Metav Werkzeuge for tailored advice and order processing: info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: M312.486
• GTIN: 4054469182278
• Weight: 4.6 kg
• Range: 20–50 mm
• Resolution: 0.001 mm
• Accuracy: ±0.005 mm
• Pieces per set: 4

Facts

• Measuring range min: 20 mm
• Measuring range max: 50 mm
• Setting rings: 25 mm and 40 mm
• Extension: 150 x Ø15.8 mm
• Readout: 0.001 mm
• Set weight: 4.6 kg

Special features

• Three‑point internal measuring set
• Suitable for blind‑hole measurement
• Scale and vernier matt chrome‑plated
• Includes setting ring and extension
• Supplied as a matched kit in a fitted case

FAQ

What measurement range does the set cover?
The M312.486 three‑point internal micrometre set covers internal diameters from 20 to 50 mm.

Is the resolution suitable for fine work?
Yes, the set provides a 0.001 mm graduation with an indicated accuracy of ±0.005 mm, which is appropriate for fine inspection and workshop quality control.

Which accessories are included to adapt to different bore depths?
The delivery includes two setting rings (25 mm and 40 mm) and an extension rod (150 x Ø15.8 mm) to extend reach and ensure correct comparative setup.

Can this set be used on blind bores?
The instrument is specifically configured for reliable measurement of blind holes, using the three‑point arrangement to centre and average the bore diameter.

What surface finish does the scale have?
The scale and vernier are matt chrome‑plated to reduce reflection and support quick, clear readings in typical workshop lighting.

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