12mm Hand Reamer H7 Form B Right-Hand Spiral Fluted Long Chamfer With Cylindrical Shank And Square Drive Uncoated - TECWERK

Take advantage of precise hole finishing, robust HSS cutting performance and a spiral-fluted geometry that improves chip control; order directly from Metav Werkzeuge or consult our specialists for technical recommendations.

Hand reamer DIN 206 Form B H7, Ø12 mm, HSS – TECWERK

The Hand reamer DIN 206 Form B H7 is a workshop-grade precision hand reamer for finishing drilled holes to exacting tolerances in manual metalworking and maintenance applications

• HSS material for long tool life
• Tolerance H7 for precise hole finishing
• Spiral-fluted design for smooth chip evacuation

Consistent, tight-fit holes through standardised tolerances

The spiral hand reamer is designed to deliver reliably accurate holes, complying with DIN 206 and achieving H7 tolerance for predictable assembly fits. With a nominal diameter of Ø12 mm, the tool removes only the final micrometres to correct roundness and size after drilling, which reduces rework and scrap rates. The standardised geometry ensures compatibility with common fit classes, so components achieve the intended interference or clearance without repeated trial adjustments.

Engineered cutting geometry for smooth operation and finish

Constructed from HSS, the reamer combines resilience with precise edge geometry to withstand workshop conditions. The spiral-fluted configuration promotes controlled chip formation and evacuation, which lowers the risk of chatter and improves surface finish. The tool’s combination of right-hand cutting and left-hand helix delivers a steady cutting action and predictable chip flow during manual reaming, while the long lead assists gradual engagement into the bore for reduced insertion effort and a finer final finish.

Practical shank design for secure handling and manual use

The reamer features a cylindrical shank with square section for positive drive and straightforward clamping in common hand tools and tap wrenches. The Form B lead geometry provides a longer approach to the cutting edges, which is particularly useful when aligning in slightly oversized or tapered starter holes — the gradual entry helps avoid centre drift and ensures a concentric final bore. The tool is uncoated, offering a neutral surface for regrinding and resharpening in routine maintenance.

Reliable tool for everyday workshop production

As a hand reamer for finishing operations, this TECWERK tool is suited to general workshop and maintenance tasks where accuracy and repeatability matter. The HSS construction and spiral flute design reduce the need for additional finishing passes, saving time while improving assembly reliability. For complex or high-volume applications, the described geometry provides a consistent baseline performance; for further guidance on integration into specific processes, Metav Werkzeuge can supply supplemental technical details and recommendations.

Contact Metav Werkzeuge for personalised technical advice on the TECWERK hand reamer, specification clarification or to request further documentation via info@metav-werkzeuge.com or by telephone on +49 2822 7131930

Technical data

• Article number: 2000865709NW
• Item: Hand reamer DIN 206 Form B H7, Ø12 mm
• Manufacturer: TECWERK
• Packaging unit: 1

Facts

• Diameter: 12 mm
• Tolerance: H7
• Standard: DIN 206
• Form: B

Special features

• Material: HSS
• Coating: uncoated
• Flute: spiral-fluted
• Helix: left-hand helix
• Cutting direction: right-hand cutting
• Lead: long lead
• Shank: cylindrical shank with square

FAQ

What materials is this hand reamer suitable for?
The TECWERK hand reamer DIN 206 Form B H7, Ø12 mm is intended for general metalworking workshop use; material-specific recommendations should be checked against the application and cutting conditions.

How close to final size does the reamer cut?
The reamer is manufactured to achieve H7 tolerance, so it removes minimal stock to bring a drilled bore to the specified fit class and final dimension.

Can the tool be resharpened or recoated?
The TECWERK reamer is uncoated and made from HSS, which allows for conventional resharpening procedures where required.

Is the shank compatible with common hand wrenches?
Yes — the cylindrical shank with square section is designed for secure clamping in standard hand tool holders and tap wrenches for manual reaming tasks.

What does Form B mean for practical use?
Form B indicates a longer lead/approach to the cutting edges, giving a gentler entry into the bore and helping to maintain concentricity and surface finish during manual finishing.

Manufacturer/Responsible: NORDWEST Handel AG, Robert-Schuman-Straße 17, 44263 Dortmund