20–25mm Digital Three-Point Internal Micrometer, Carbide Measuring Faces, IP65, Setting Ring, Case - Metav IndustryLine

Take advantage of precise internal bore measurement, robust shop-floor protection and convenient digital output to speed inspection cycles. With a three-point measuring system, IP65 protection and carbide measuring faces, this instrument delivers repeatable results for small bores; order supply or contact the Metav Werkzeuge consultants for advice and delivery arrangements.

Digital three-point internal micrometer M312.235.PN — 20–25 mm, IP65, carbide faces (Metav IndustryLine)

The Digital three-point internal micrometer M312.235.PN is a compact, workshop-ready measuring instrument for reliable internal diameter checks of bores and blind holes in the 20–25 mm range.

• Digital three-point internal measuring system
• IP65 protection for workshop use
• Carbide measuring faces for wear resistance
• Includes setting ring and extension

Micron-level accuracy for small bores

The three-point design ensures concentric contact and minimal alignment error, delivering a stated accuracy of 0.005 mm (5 µm). This level of precision makes the instrument suitable for validation tasks where repeatability matters; the geometry of the three jaws stabilises the measurement in short bores and is specifically optimised for blind holes. The combination of close-range measuring geometry and hardened carbide faces reduces wear and preserves the calibration baseline over many cycles.

Durable construction for shop-floor reliability

Built to withstand everyday use, the micrometer features IP65 protection to resist dust and splashes, allowing measurement close to machining processes without risking the electronics. Compliance with DIN 863 underlines the mechanical design and inspection traceability. The robust frame and the wear-resistant measuring faces provide an economic balance between durability and handling comfort in production and quality-control environments.

Fast results and seamless data transfer

The instrument's digital display offers ON/PRESET, mm/inch and HOLD functions for quick readout and operator convenience; measurements can be exported via the RB 6 data output for SPC or inspection reporting. A supplied setting ring simplifies zeroing and verification before a measurement run, while the included extension enhances reach for deeper or awkward bores. These features reduce cycle time and enable direct integration into inspection routines.

Practical accessories and suited applications

Delivered with a setting ring and an extension (150×Ø15.8), the micrometer is ready for immediate use in workshop, toolroom and incoming inspection roles. Its compact measuring range and precise behaviour make it an excellent choice for small-component manufacturers, tooling shops and laboratories that require repeatable bore checks without complex fixturing. The balanced weight and ergonomic handling support frequent sampling during production control.

Contact Metav Werkzeuge today to discuss how the Metav IndustryLine digital three-point internal micrometer M312.235.PN can be integrated into inspection workflows and supplied from Emmerich with tailored accessory options.

Technical Data

• SKU: M312.235.PN
• GTIN: 4054469179117
• Brand: Metav IndustryLine
• ECLASS: 21170335
• ETIM: EC003590
• Norm: DIN 863

Facts

• Measuring range: 20–25 mm
• Accuracy: 0.005 mm
• Weight: 1 kg
• IP protection: IP65
• Setting ring: 25
• Extension: 150×Ø15.8
• Zolltarifnummer: 90173000

Special features

• Carbide (HM) measuring faces
• Digital display with ON/PRESET, mm/inch and HOLD
• Data output: RB 6
• Suitable for blind-hole measurement
• Includes setting ring and extension
• Designed for workshop and inspection use

FAQ

What makes the three-point design better for internal measurements?
The three-point mechanism of the M312.235.PN ensures stable contact around the bore circumference, reducing eccentricity and improving repeatability compared with two-point probes, which helps achieve the stated accuracy of 0.005 mm.

Can the instrument measure blind holes and through-holes?
Yes. The Metav IndustryLine digital three-point internal micrometer M312.235.PN is suitable for both blind-hole measurement and standard internal checks within its 20–25 mm range.

How is the instrument zeroed and prepared for measurement?
A dedicated setting ring is supplied for quick calibration; the digital display supports ON/PRESET functions so verification can be completed rapidly before inspection runs.

Is there a way to export measured values to a PC or SPC system?
Measurement data from this micrometer can be output via the RB 6 interface, allowing integration with data collection systems and inspection software.

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