150–175mm Three-Point Inside Micrometer Self-Centring, 0.008mm Accuracy, Supplied in Case - Metav IndustryLine

Take advantage of the combination of self‑centring three‑point contact, measuring range 150–175 mm and accuracy ±0.008 mm for consistent internal diameter checks in workshop and inspection routines. Order the instrument directly via Metav Werkzeuge or consult the Metav team for application advice.

Three‑point internal micrometer M836.721 — Self‑centring precision, 150–175 mm (Metav IndustryLine)

The three‑point internal micrometer is a precision gauge designed for reliable internal diameter measurement in production, inspection and toolroom environments, featuring a self‑centring anvil system for repeatable centring and analogue vernier reading for straightforward interpretation.

• Self‑centring three‑point anvil design
• Accuracy ±0.008 mm
• Reading graduation 0.005 mm
• Hardened measuring faces for wear resistance

Reduce rework with reproducible centring

The three‑point contact system provides automatic centration of the measured bore, which significantly reduces variation between successive readings. By combining self‑centring geometry with a tight accuracy ±0.008 mm, the instrument supports quality control processes where repeated internal diameter checks must be both fast and dependable. This benefit translates directly into fewer rejects and lower rework rates in serial production.

Clear analogue measurement for robust environments

As an analogue instrument with a vernier-style graduation, the gauge offers a reading of 0.005 mm, enabling precise readings without dependence on batteries or electronics. This simplicity makes the tool well suited to workshop benches and inspection tables where robustness and immediate usability are priorities. The mechanical display is easy to maintain and avoids downtime related to electronic faults.

Designed for longevity under frequent use

The measuring faces are hardened, ensuring resistance to abrasion and preserving accuracy over prolonged use. The construction is geared towards repeated internal measurements in metalworking and fabrication contexts; hardened contact surfaces and a stable spindle minimise wear-induced drift and extend the service life of the instrument.

Practical operation and interpretation

Operation follows familiar micrometer practice: the three anvils expand against the bore and centre automatically, while the spindle and vernier provide the final reading. The vernier division of 0.005 mm allows technicians to interpret results quickly; for users new to vernier scales, the simple alignment method offers a clear path from raw measurement to documented value without complex conversion steps.

Suitable for workshop and inspection workflows

With a measuring range of 150–175 mm, the instrument fills the mid‑range need for internal diameter verification commonly required in tooling, fixtures and component inspection. Its combination of range and repeatable centring makes it an efficient choice for batch inspections where one gauge can cover several nominal sizes without sacrificing stiffness or handling comfort.

Integrating the gauge into quality management

The stable mechanical design and defined accuracy simplify traceability in routine checks and help to establish consistent measurement routines on the shop floor. Documentation of measurement tasks becomes more reliable when instruments deliver predictable performance; the three‑point internal micrometer supports such traceable inspection practices through its repeatable contact geometry and robust readout.

For specification guidance or to secure the M836.721 for your inspection bench, contact Metav Werkzeuge for expert advice and order support: info@metav-werkzeuge.com, +49 2822 7131930

Technical data

• Article number: M836.721
• GTIN: 4061905040986
• Manufacturer: Metav IndustryLine
• eClass: 21170335
• ETIM: EC003590

Facts

• Measuring range: 150–175 mm
• Accuracy: ±0.008 mm
• Reading / graduation: 0.005 mm
• Instrument type: Analogue internal micrometer

Special features

• Three‑point self‑centring anvil
• Hardened measuring faces
• Designed for internal diameter measurement
• Analogue vernier operation

FAQ

How accurate is this internal micrometer?
The three‑point internal micrometer delivers an accuracy of ±0.008 mm, with a vernier reading to 0.005 mm, making it suitable for routine inspection and workshop control tasks.

What measuring range does the instrument cover?
The M836.721 covers a 150–175 mm range, intended for medium‑sized bores commonly encountered in tooling and component inspection.

Why use a three‑point design instead of two anvils?
A three‑point arrangement centres automatically in the bore, improving repeatability and reducing operator‑dependent eccentricity compared with two‑point gauges.

Is the gauge suitable for daily workshop use?
Yes. The hardened measuring faces and analogue construction are well matched to frequent use, providing wear resistance and simple maintenance without electronic dependencies.

How is a reading taken on the vernier?
Rotate the spindle until the three anvils contact the bore and read the main scale together with the vernier division; the vernier provides the 0.005 mm fraction to complete the measurement.

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