6-8mm Three-Point Internal Micrometer For Blind Holes, Includes Setting Ring And Extension In Plastic Case - Metav IndustryLine

Compact, highly accurate three-point internal micrometer with a 6–8 mm measuring range and ±0.004 mm accuracy; benefits include dependable blind‑hole measurement and rugged, matt‑chromed scale for repeatable workshop use. Order or discuss suitability with Metav Werkzeuge’s consultants for a seamless integration into inspection routines.

Three-point internal micrometer M312.130.P — analogue inside micrometer, 6–8 mm range, ±0.004 mm accuracy (Metav IndustryLine)

The three-point internal micrometer is an analogue instrument engineered for precise measurement of blind‑hole bores and tight internal diameters in toolmaking and precision inspection tasks.

High precision ±0.004 mm accuracy
Compact 6–8 mm measurement range
Analogue nonius with matt‑chromed scale
Includes setting ring and extension 50×Ø5.7 mm

Reduce rework with high‑precision metrology

The micrometer delivers a declared accuracy of ±0.004 mm, combined with a fine reading step of 0.001 mm, which reduces measurement uncertainty in critical internal diameters. This level of precision limits the need for repeat machining or scrap, supporting efficient quality control workflows. The instrument’s three‑point contact system provides concentric engagement with the bore, translating geometric contact into a stable, repeatable reading for acceptance decisions.

Measure blind holes and tight bores with confidence

Designed specifically for internal measurements, the three‑point contact head facilitates secure centring in blind‑hole bores, where standard callipers cannot reach. Supplied extension (50×Ø5.7 mm) and an adjusting ring enable adaptation to restricted depths and variable bore depths without compromise to repeatability. The compact measurement span of 6–8 mm makes this tool ideal for small‑diameter inspections in watchmaking, hydraulics ports, or precision turned parts.

Built for workshop resilience and straightforward handling

The scale and vernier are matt‑chromed to resist glare and wear, enhancing legibility in bright shop lighting and extending service life under regular use. The analogue nonius mechanism is robust and requires no batteries, which simplifies maintenance and reduces downtime. Packaged in a protective case, the instrument remains transport‑ready and safeguarded between jobs, contributing to a reliable inspection routine on the shop floor.

Accessories and setup that speed use and traceability

Delivery includes an adjusting ring and the specified extension, enabling quick setup for specific bore depths and reducing fixture changes. The compact mass and ergonomics facilitate one‑hand use for rapid spot checks during production runs. For organisations that require traceable documentation, the SKU M312.130.P is useful for inventory control and procurement records when standardising inspection equipment across workstations.

Contact Metav Werkzeuge to discuss how the Metav IndustryLine three‑point internal micrometer M312.130.P can be integrated into existing inspection procedures or to request tailored purchasing advice

Technical data

• SKU: M312.130.P
• GTIN: 4054469158594
• ECLASS: 21170335
• ETIM: EC003590
• Tariff number: 90173000

Facts

• Measurement range: 6–8 mm
• Max. measuring range: 8 mm
• Min. measuring range: 6 mm
• Accuracy: ±0.004 mm
• Reading (scale): 0.001 mm
• Length: 50 mm
• Weight: 0.6 kg

Special features

• Scale and vernier matt‑chromed
• Analogue nonius (mechanical)
• Suitable for blind‑hole bores
• Includes setting ring (size 8) and extension (50×Ø5.7 mm)
• Supplied in protective case

FAQ

How small a bore can be measured with this instrument?
The three‑point internal micrometer measures from 6 mm to 8 mm, making it suitable for very small internal diameters in precision components.

Is the tool suitable for blind‑hole measurement?
Yes, the instrument is explicitly designed for blind‑hole bores and includes an extension to reach restricted depths.

What accessories are supplied with the micrometer?
The delivery contains an adjusting ring and the specified extension (50×Ø5.7 mm) for adaptation to different bore depths.

Which brand and SKU should be referenced for procurement?
Reference Metav IndustryLine and SKU M312.130.P for ordering and inventory purposes.

Is the scale durable for shop use?
The matt‑chromed scale and vernier provide enhanced wear resistance and reduce glare, suited to regular workshop use.

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