8mm NC Machine Reamer H7 Form B Right-Hand Spiral Fluted HSS-Co, Cylindrical Shank - TECWERK

Take advantage of the combination of HSS‑Co construction and H7 tolerance to achieve consistent fit quality and extended tool life; the reamer is optimised for blind and through holes in steel, ductile cast iron and non‑ferrous metals. Order the tool directly via Metav Werkzeuge or contact our consultants for application-specific advice.

NC machine reamer DIN 212-3 H7 – TECWERK, Ø8 mm, HSS‑Co, left‑hand spiral

The NC machine reamer DIN 212-3 H7 is a finishing tool for CNC operations, designed to produce precise fits in blind and through holes in steel, ductile cast iron and non‑ferrous metals.

• HSS‑Co construction for wear resistance
• Tolerance H7 for precise fits
• Left‑hand spiral, helical flutes
• Cylindrical shank for standard holders

Achieve repeatable fits with hardened‑grade cutting geometry

Built from HSS‑Co, this machine reamer combines toughness with edge retention to deliver consistent finishing across series production. The tool is manufactured to the H7 tolerance class, which corresponds to a commonly used ISO hole tolerance for close fits; this means the finished bore meets defined limits for diameter and runout, supporting interchangeability in assembly. By prioritising measurable fit accuracy and roundness accuracy, the tool reduces scrap and rework, enhancing throughput in precision machining environments.

Reliable performance across common engineering materials

The reamer is configured for both blind and through holes, making it versatile on mixed production lines. Its geometry and material pairing are suitable for machining steel, ductile cast iron (GGG) and non‑ferrous metals, ensuring stable cutting without premature wear. For operations that combine different workpiece materials, the tool’s balanced design helps maintain surface finish and dimensional stability, which in turn shortens downstream processes such as deburring or press fits.

Optimised flute design for chip control and vibration damping

Equipped with helical flutes and an unequal flute spacing, the tool improves chip evacuation and reduces sympathetic vibration during reaming cycles. The left‑hand spiral flute combined with right‑hand cutting action encourages reliable chip flow, especially in deep or blind bores. Unequal flute division helps to break up harmonics, lowering the risk of chatter and producing a cleaner bore with better surface integrity. These geometry choices directly contribute to longer effective tool life and more predictable cycle time.

Integrates with high‑precision toolholding to secure process stability

The reamer features a cylindrical shank for compatibility with standard holders and is intended for use with high‑accuracy chucks. In combination with hydrodynamic, high‑precision or shrink‑fit chucks, the tool supports the highest achievable runout control and process security in CNC environments. This integration is particularly important for assembly applications where pin‑and‑bore tolerances are critical; pairing the reamer with appropriate toolholding ensures consistent production of mating components and reduces assembly rejects. The tool’s Form B geometry further aids stable engagement and smooth finish generation.

Contact Metav Werkzeuge today to discuss how the TECWERK NC machine reamer DIN 212-3 H7 (Ø8 mm, HSS‑Co) can be integrated into existing CNC tool sets, or request tailored tooling recommendations from our specialists at Metav Werkzeuge in Emmerich.

Technical data

• Article number: 2000865309NW
• Label: NC-Maschinenreibahle DIN 212-3 H7 Form B D.8mm HSS-Co TECWERK
• Brand: TECWERK

Facts

• Diameter: 8 mm
• Tolerance: H7
• Packaging unit: 1

Special features

• Material: HSS‑Co
• Standard: DIN 212-3
• Form: B
• Cutting direction: right‑hand cutting
• Flutes: helical flutes, left‑hand spiral
• Shank: cylindrical shank
• Flute spacing: unequal division
• Application: blind and through holes
• Suitable for: steel, ductile cast iron (GGG), non‑ferrous metals
• Recommended toolholding: hydrodynamic, high‑precision, or shrink‑fit chucks for highest runout accuracy and process security

FAQ

What tolerance does the reamer deliver and what does H7 mean?
H7 denotes a standard hole tolerance; the NC machine reamer DIN 212-3 H7 from TECWERK is manufactured to that tolerance to ensure consistent bore diameter and runout suitable for close fits.

Which materials can be machined with this reamer?
The tool is designed for machining steel, ductile cast iron (GGG) and non‑ferrous metals, making the TECWERK reamer versatile across common engineering applications.

Is the reamer compatible with standard toolholders?
Yes, the reamer has a cylindrical shank and is compatible with standard holders; for best runout results, pairing with hydrodynamic, high‑precision or shrink‑fit chucks is recommended.

How do the flute design and spacing affect performance?
The helical flutes with unequal flute spacing improve chip control and reduce vibration, which enhances surface finish and extends tool life when using the TECWERK reamer.

What benefits are gained by using this reamer in a production line?
Using the reamer supports repeatable hole quality and roundness accuracy, reducing downstream rework and improving assembly consistency; the design helps maintain cycle time stability in CNC production.

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