25-30mm Three-Point Internal Micrometer Digital, Carbide Measuring Faces, RB6, No Setting Ring - Metav IndustryLine

The combination of a 25–30 mm measuring range, tungsten carbide measuring faces and a precise 0.005 mm accuracy creates a compact, robust solution for internal measurements in restricted bores; order the instrument directly via Metav Werkzeuge or consult the team for application guidance.

M312.216 — Digital three-point inside micrometer, 25–30 mm, HM measuring faces (Metav IndustryLine)

The M312.216 is a digital three-point inside micrometer designed for accurate measurement of small blind bores and internal diameters in precision engineering and workshop environments.

• Digital display with mm/inch and hold
• Three-point inside measurement for stable contact
• Carbide measuring faces (HM) for wear resistance
• High accuracy 0.005 mm for reliable checks

Precision where blind holes matter

The three-point arrangement delivers a centring action that stabilises the contact points in narrow bores, ensuring repeatable results even in short or blind-hole situations. With a measuring range of 25–30 mm and a stated accuracy of 0.005 mm, this device is tailored for fine internal checks where dimensional certainty is required. The digital readout, featuring ON/OFF/SET, HOLD and mm/inch functions, reduces interpretation errors and accelerates inspection routines; the clear display simplifies the transition from manual vernier techniques to rapid electronic readings without sacrificing the control expected in precision measurement.

Engineered for dependable readings and efficient workflows

A combination of three-point geometry and HM (tungsten carbide) measuring faces lowers wear and maintains contact integrity across repeated use, which is particularly beneficial where frequent checks of small bores are part of a production process. The instrument’s reading resolution of 0.001 mm supports fine discrimination, while the solid construction and balanced mass contribute to stable handling; the item weighs approximately 1.3 kg, offering a reassuring feel without being unwieldy. For workshops requiring traceable results, the micrometer integrates into existing test procedures and is suitable for routine quality-control tasks in precision engineering and toolmaking.

Durability and practical handling in the workshop

Built with workshop practice in mind, the micrometer omits decorative extras in favour of functional durability: the measuring faces resist abrasive wear, and the three-point clamping effect reduces tilting, which is a common source of measurement error in small bores. The instrument is supplied without a setting ring or extensions, making it compact for storage and immediate use where blind-hole measurements are frequent. The robust digital electronics with straightforward control keys help maintain consistent throughput during repetitive inspections, while the physical design supports quick placement in the bore and confident take-up of the measurement force for reproducible outcomes.

Contact Metav Werkzeuge today for tailored advice on integrating the M312.216 into existing quality procedures or to arrange direct supply from our Emmerich facility

Technical data

• Article number: M312.216
• GTIN: 4054469169132
• Customs tariff number: 90173000
• eCl@ss: 21170335
• ETIM: EC003590

Facts

• Measuring range: 25–30 mm
• Maximum measuring range: 30 mm
• Minimum measuring range: 25 mm
• Reading (resolution): 0.001 mm
• Accuracy: 0.005 mm
• Weight: 1.3 kg
• Data output: RB 6
• Digital: yes

Special features

• Measuring faces: tungsten carbide (HM)
• Display functions: ON/OFF/SET, HOLD, mm/inch
• Design: three-point inside measuring instrument
• Delivered without setting ring
• No extension supplied
• Suitable for blind-hole (sackloch) bores

FAQ

How is repeatability ensured for blind-hole measurements?
The three-point centring principle of the M312.216 provides stable contact in blind bores, which improves repeatability by reducing tilt and uneven contact during measurement.

Can the digital readings be switched between units?
Yes, the instrument’s digital display includes a mm/inch function enabling quick unit changes directly on the device.

Is the instrument suitable for frequent workshop use?
The M312.216’s carbide measuring faces and robust construction are designed for regular use in precision workshop settings where wear resistance and repeatable results are required.

What data output does the micrometer provide for SPC or documentation?
This model is specified with an RB 6 data output; refer to the technical data for integration options into documentation workflows.

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