4mm FH 8 Centre Holder With 8mm Shank H6, 4 mm H7 Bore - Käfer Messuhrenfabrik GmbH & Co. KG

Combining a H7 mounting bore Ø 4 mm with an 8 mm h6 shank delivers precise, repeatable centring for inspection and fixture work; the FH 8 series design ensures standardised installation and reliable alignment. Order the centre holder directly via Metav Werkzeuge or consult the technical team for application-specific guidance.

Centre holder FH 8 – shank Ø 8 mm h6, mounting bore Ø 4 mm H7 (Käfer)

The Centre holder FH 8 is a precision centring accessory for metrology and clamping setups, offering standardised fitment with an 8 mm h6 shank and a 4 mm H7 mounting bore for stable, repeatable positioning.

• Precision mounting bore Ø 4 mm H7
• Shank Ø 8 mm with h6 tolerance
• Series FH 8 for standardised fitment
• Suitable for metrology and fixture integration

Repeatable centring through standardised tolerances

The FH 8 centre holder is engineered for repeatable positioning by combining a 4 mm H7 mounting bore with an 8 mm h6 shank. These tolerance classes mean the bore is manufactured to a finely controlled fit and the shank conforms to a close tolerance, which together reduce radial play and misalignment. The result is consistent alignment across repeated assemblies, which improves measurement reliability and reduces time spent on re-clamping or repositioning. For workshops seeking stable set-ups, the precise fit minimises variation between operations.

Fast integration with measurement and clamping systems

A compact design with standard dimensions supports quick integration into existing metrology benches, holders and fixture rails. The combination of the FH 8 series geometry and the specified tolerances enables simple interchangeability with compatible fixtures and mounting adapters. This compatibility shortens preparation time and streamlines workflow, offering a clear efficiency advantage in small-batch inspection or repetitive assembly tasks. The product therefore contributes directly to higher throughput and fewer setup-related delays.

Confidence in brand and practical benefits for the workshop

Produced by Käfer Messuhrenfabrik, the centre holder delivers the expected precision for inspection tasks while supporting robust workshop processes. The FH 8 format is a practical choice when standardisation and traceable fits are required, helping to avoid measurement drift and reduce scrap. The concise specification—Ø 4 mm H7 and Ø 8 mm h6—also simplifies procurement decisions when matching components or replacement parts are needed, ensuring predictable performance in quality assurance workflows.

Order the Käfer FH 8 centre holder via Metav Werkzeuge for consistent centring performance and to benefit from Metav's workshop-focused supply chain; Metav Werkzeuge can advise on compatibility and procurement for industrial metrology needs.

Technical data

• Article number: 4000851359NW
• SKU / UID: 4000851359NW
• Product label: Zentrierhalter FH 8 Aufnahmebohrung-Ø: 4 mm H7; Schaft-Ø: 8 mm h6 KÄFER
• Product type: Centre holder
• Model series: FH 8
• Packaging unit: 1

Core specifications

• Mounting bore: Ø 4 mm H7
• Shank diameter: Ø 8 mm h6
• Series: FH 8
• Manufacturer name: Käfer Messuhrenfabrik GmbH & Co. KG
• Unique ID: 4000851359NW

Special features

• Precision-fit H7 / h6 tolerances
• Standardised FH 8 series dimensions
• Intended for metrology and fixture use
• Compact, easy-to-integrate form factor

FAQ

What do the H7 and h6 tolerances mean for centring accuracy?
H7 and h6 denote standard ISO tolerance classes; the combination used in this centre holder ensures a close, controlled fit between the 4 mm H7 mounting bore and the 8 mm h6 shank, resulting in reduced radial play and improved repeatability for the FH 8 centre holder.

Is the centre holder suitable for use with dial indicators and test fixtures?
Yes, the FH 8 centre holder is intended for integration into metrology setups and test fixtures where standardised dimensions and stable centring are required; the Käfer FH 8 format supports common fixture interfaces.

Which identifier should be used when ordering replacement items?
Use the article number or UID 4000851359NW and the model designation FH 8 to ensure the correct Käfer centre holder is supplied.

Does the product data specify the material or coating of the centre holder?
The provided product information does not specify material or coating details for this centre holder; only the mounting and shank dimensions with their tolerances are given.

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