125-150mm Three-Point Internal Micrometer For Blind Holes, Ratchet, Matt Chrome Scale In Plastic Case - Metav IndustryLine

Take advantage of precise internal diameter measurement across a practical workshop range, combined with a ratchet stop for reproducible pressure and a clear analogue vernier for reliable read‑out; order the instrument directly via Metav Werkzeuge or ask our consultants if bespoke advice is required.

Metav IndustryLine three‑point internal micrometer M312.147.S — 125–150 mm range, analogue vernier

A robust three‑point internal micrometer for accurate measurement of internal diameters, designed especially for blind‑hole applications in machine shops and quality control.

• Three‑point measuring head for centred contact
• Measuring range 125–150 mm
• Ratchet stop for reproducible pressure
• Hardened measuring faces and matt chrome scale

Precise blind‑hole measurement for consistent results

The instrument uses a three‑point measuring head that automatically centres in bores, converting variable contact points into a single reliable diameter result; this geometry is particularly advantageous when measuring blind holes where axial access is limited. With a measuring range of 125–150 mm, the micrometer sits in the standard class for workshop metrology, offering the best compromise between reach and rigidity for daily use in machine and metalworking environments. The specified accuracy ±0.006 mm and a resolution of 0.005 mm (analogue nonius) provide predictable, verifiable results that support quality control documentation and process consistency.

Durable design for repeatable handling on the shop floor

Built for frequent use, the unit features a ratchet stop to standardise contact pressure and reduce operator‑induced variation; this contributes directly to faster series checks and fewer reworks. The measuring faces are hardened, extending service life where contact occurs with finished surfaces, while the matt chrome scale and vernier ensure legible readings under workshop lighting. A measuring depth of 140 mm allows access into moderately deep bores without sacrificing stability, and the instrument’s mechanical design favours robust daily handling and straightforward maintenance.

Integration into inspection routines and practical guidance

This analogue micrometer requires no electronics, making it straightforward to integrate into existing inspection benches and fixtures; measurements can be recorded manually for traceable inspection reports. The instrument is supplied without a setting ring, so calibration or setting procedures should be planned into initial commissioning to match in‑house standards. For tasks that prioritise mechanical simplicity, repeatability and ease of interpretation, this micrometer is a pragmatic choice within production control and toolroom workflows.

For tailored advice on the Metav IndustryLine three‑point internal micrometer M312.147.S and delivery from Emmerich, contact Metav Werkzeuge by phone +49 2822 7131930 or email info@metav-werkzeuge.com for expert support and availability

Technical data

• SKU: M312.147.S
• GTIN: 4054469158693
• Manufacturer: Metav IndustryLine
• Type: Three‑point internal micrometer (analogue)
• Material: scale and vernier matt chrome
• Measuring range: 125–150 mm
• Measuring depth: 140 mm
• Resolution: 0.005 mm
• Accuracy: ±0.006 mm
• Weight: 3.1 kg
• Ratchet stop: yes
• Special application: for measuring blind holes
• Delivered without setting ring
• Customs tariff number: 90173000

Facts

• Measuring range: 125–150 mm
• Measuring depth: 140 mm
• Resolution: 0.005 mm
• Accuracy: ±0.006 mm
• Weight: 3.1 kg

Special features

• Three‑point measuring head
• Ratchet stop for constant measuring force
• Hardened measuring faces
• Scale and vernier matt chrome
• Analogue nonius display
• Suitable for blind‑hole measurement
• Delivered without setting ring

FAQ

How accurate is the three‑point internal micrometer?
The Metav IndustryLine three‑point internal micrometer M312.147.S provides an accuracy of ±0.006 mm with a resolution of 0.005 mm via its analogue vernier display.

Can this instrument measure blind holes reliably?
Yes, the tool was designed for blind‑hole measurement and includes a three‑point head and a measuring depth of 140 mm that facilitate reliable results in such applications.

Is a setting ring supplied with the micrometer?
No, the delivery does not include a setting ring; calibration or a reference standard should be used when commissioning the instrument.

Is the read‑out digital or analogue?
The device uses an analogue nonius (vernier) for read‑out, suited to environments where mechanical simplicity and reliability are preferred.

What workshop tasks is this micrometer best suited to?
It is ideal for internal diameter checks in machine shops, toolrooms and quality control departments where repeatable measurements of blind or through bores are required.

How does the ratchet stop improve measurement quality?
The ratchet stop standardises the contact pressure applied during measurement, reducing operator variance and improving repeatability of results across multiple checks.

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