12–20mm Digital Three-Point Internal Micrometer, Dual Heads, Carbide Faces, IP65, With Setting Ring And Extension - Metav IndustryLine

Take advantage of the combination of robust workshop protection, carbide measuring faces and fine resolution for reliable internal diameter checks of blind holes; order the Digital three‑point internal gauge M312.285.PN directly via Metav Werkzeuge or ask our consultants if needed.

Digital three‑point internal gauge M312.285.PN — IP65, carbide faces, digital readout

Digital three‑point internal gauge M312.285.PN for precise measurement of blind and through bores in workshop and production environments

• Digital readout with mm/inch & HOLD function
• IP65 protection for workshop resilience
• Carbide measuring faces for extended wear resistance
• Supplied with setting ring and extension

Precision where blind‑hole measurement matters

The M312.285.PN is a digital three‑point internal gauge engineered for accurate inside diameter measurement of small bores, especially blind holes. The instrument combines a three‑point contact geometry with hardened carbide measuring faces, ensuring repeatable contact and low wear during serial inspection. With a measuring range of 12–20 mm and a measurement depth of 80 mm, this classifies the instrument in the micro category for compact, high‑precision internal measurement tasks commonly found in toolmaking and fine mechanical assemblies. The device conforms to DIN 863, providing a familiar reference for workshop quality assurance.

Measurable accuracy and data integration for production control

Accuracy is a primary selling point: the instrument offers a stated accuracy of 0.005 mm and a display resolution of 0.001 mm, making it suitable for fine tolerance checks and calibration routines. The digital display includes ON/PRESET, mm/inch selection and HOLD functions to support fast readings and documentation. A standard data output interface RB 6 enables straightforward integration with inspection data collection systems or handheld loggers, supporting traceable measurement workflows and reducing transcription errors in quality control processes.

Robust design for everyday workshop use

Built to withstand practical shop conditions, the gauge features IP65 ingress protection to resist dust and light jets of water, and a substantial overall build weight of 1.8 kg that gives a steady feel when measuring. The two measuring heads provide flexibility across the stepped range (12–16 and 16–20 mm), while the supplied setting ring and extension support simple calibration and extended reach where required. Delivery includes a protective transport case for safe storage and handling between measuring stations, contributing to long service life and reliable performance on the shop floor.

Practical benefits and application fit

For applications such as bore inspection in small housings, quality control of blind‑hole production or final checks before assembly, the instrument offers direct benefits: reduced rework through precise internal diameter verification and faster inspection cycles thanks to the digital readout and data output. The carbide faces lower wear rates compared with standard steel contacts, which reduces maintenance frequency and ensures consistent readings across batches. This makes the gauge suitable for both single‑station inspection and integration into a small inspection cell.

Contact Metav Werkzeuge to discuss application suitability and arrange supply of the M312.285.PN digital three‑point internal gauge with IP65 protection and carbide measuring faces

Technical data

• Article number: M312.285.PN
• GTIN: 4054469179261
• Label: Digital three‑point internal gauge, 12–20 mm, 2 heads, IP65, carbide faces
• Weight: 1.8 kg
• Standard: DIN 863

Numbers / Core technical data

• Measuring range: 12–20 mm (12–16 + 16–20)
• Measurement depth: 80 mm
• Accuracy: 0.005 mm
• Display resolution: 0.001 mm
• Setting ring: 16
• Extension length: 150 mm
• Customs tariff number: 90173000

Special features

• IP65 protection class
• Carbide (HM) measuring faces
• Digital display with ON/PRESET, mm/inch and HOLD
• Two measuring heads for stepped range coverage
• Data output: RB 6
• Supplied with setting ring and extension
• Transport case included
• Suitable for blind‑hole measurement

FAQ

What measurement range does the gauge cover?
The gauge covers a measuring range of 12–20 mm, arranged as two heads for 12–16 mm and 16–20 mm coverage.

How precise are the readings from the device?
The instrument provides an accuracy of 0.005 mm with a display resolution of 0.001 mm, suitable for fine workshop inspection.

Is the gauge suitable for measuring blind holes?
Yes. The M312.285.PN is designed for blind‑hole applications and is explicitly suitable for such measurements.

Which data interface is available for process integration?
The device offers an RB 6 data output for connection to inspection loggers or data acquisition systems.

Are the measuring faces durable for serial inspection?
The measuring faces are made of carbide, which increases wear resistance and prolongs service life in repetitive measurement tasks.

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