20-50mm Three-Point Internal Measuring Set For Blind Holes, Analog 0.005mm, DIN 863 - Metav IndustryLine

Take advantage of precise 0.005 mm accuracy and carbide measuring faces combined with a practical four-piece range covering 20–50 mm for reliable bore inspection; order the set directly via Metav Werkzeuge or contact the consultants for application advice.

Three-point internal measuring set M312.178 — analogue gauge with carbide faces (20–50 mm) — Metav IndustryLine

The Three-point internal measuring set M312.178 is an analogue internal measurement solution for precision inspection of bores and blind holes in workshops and toolrooms.

• Analogue vernier, 0.005 mm accuracy
• Carbide measuring faces for longevity
• Includes setting rings 25 and 40 mm
• Suitable for blind-hole measurements

Precision where small tolerances matter

The three-point system delivers centred contact on the bore, converting small radial differences into repeatable readings on the analogue vernier. With a stated accuracy of 0.005 mm, the instrument is positioned for high-precision internal measurements and is suitable where sub‑0.01 mm resolution is required. Certified to DIN 863, the design supports consistent inspection routines and reduces uncertainty during manual measurement sequences.

Robust engineering for workshop use

Scale and vernier are matt chrome‑plated, combining corrosion resistance with low reflectivity that eases reading under workshop lighting. The measuring faces are made of carbide, offering wear resistance during repeated contact in production environments. The set is supplied as a four‑piece set covering 20–50 mm, with included setting rings (25 and 40 mm) and extensions (150 × Ø16 and 150 × Ø23.4) for adaptable fixturing. The overall construction balances stiffness and handling for everyday metrology tasks.

Practical workflow advantages and application scope

Designed for internal bores and specifically suitable for blind‑hole measurement, the gauge converts three contact points into a single reliable diameter readout, simplifying inspection of deep or recessed features. The compact measuring range places this set in the micro classification (max. range 10–100 mm), making it particularly useful for fine mechanical components, small housings and tooling. The analogue format requires no data interface, favouring straightforward use where tactile control and immediate readings are preferred.

Choose the Metav IndustryLine three-point internal measuring set for dependable bore inspection and contact Metav Werkzeuge in Emmerich for technical advice or to arrange supply at info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: M312.178
• GTIN: 4054469119830
• Manufacturer: Metav IndustryLine
• Model designation: Three-point internal measuring set, 20–50 mm

Facts

• Measuring range: 20–50 mm
• Accuracy: 0.005 mm
• Pieces per set: 4
• Weight: 4.6 kg

Special features

• Scale and vernier matt chrome-plated
• Carbide measuring faces
• Analogue vernier (no data output)
• Conforms to DIN 863
• Suitable for blind-hole measurement
• Setting rings: 25 mm and 40 mm
• Extensions: 150 × Ø16; 150 × Ø23.4

FAQ

How does the three-point system improve bore measurement accuracy?
The three-point mechanism ensures centred contact inside a bore so that readings reflect the true internal diameter; the Three-point internal measuring set M312.178 translates these contacts into a single analogue reading for repeatable inspection.

What level of precision can be expected with this gauge?
The gauge offers an accuracy of 0.005 mm and is manufactured to meet DIN 863, making it suitable for fine mechanical inspections where sub‑0.01 mm precision is needed.

Are the measuring faces durable for regular workshop use?
Yes, the measuring faces are made of carbide, which provides high wear resistance and maintains measurement integrity over prolonged use.

What accessories are included with the set?
The set comprises four measuring heads covering 20–50 mm, setting rings (25 and 40 mm) and extensions (150 × Ø16; 150 × Ø23.4) to support different inspection setups.

Is this instrument suitable for blind-hole measurement?
Yes, the tool is explicitly designed and suitable for blind‑hole measurement, enabling reliable inspection of recesses and partial-depth bores.

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