4.5mm NC Machine Reamer H7 Form B HSS-Co, Right-Hand Spiral Fluted, Cylindrical Shank - TECWERK

Take advantage of the combination of cobalt high-speed steel, a DIN 212-3 Form B geometry and a cylindrical shank for stable clamping and reproducible H7 fits; order the reamer directly via Metav Werkzeuge or contact our consultants for application advice.

NC machine reamer DIN 212-3 H7 Form B, 4.5 mm — TECWERK

The NC machine reamer designed for precision reaming of blind and through holes in steel, ductile cast iron and non‑ferrous metals, supplied in a 4.5 mm diameter for accurate H7 fits.

• Cobalt HSS for high wear resistance
• DIN 212-3, Form B geometry
• Tolerance H7 for precision fits
• Cylindrical shank, helical flutes

Consistent fits through hardened tool material and standardised tolerance

Manufactured from cobalt high‑speed steel (HSS‑Co) and conforming to DIN 212‑3, this precision reamer delivers the metallurgical and geometric basis required for repeatable holemaking. The H7 tolerance class guarantees defined clearance values when used for mating shafts and housings; this reduces rework and ensures interchangeability in assembly processes. Specifying a tool with a recognised standard and a cobalt alloy provides improved edge stability and extended tool life under moderate cutting conditions.

Robust flute and shank design stabilises machining and chip control

The tool features helical flutes with an unequal pitch and a cylindrical shank, enabling smooth chip evacuation and stable clamping in chucking systems. The combination of right‑hand cutting and a left‑hand helix, as supplied, helps to balance cutting forces and can reduce vibration in certain set‑ups. Unequal flute spacing diminishes harmonic excitation, contributing to improved runout accuracy when the tool is used with hydro‑expansion, high‑precision or shrink‑fit holders. This geometric concept supports a predictable process capability in NC reaming operations.

Application guidance for reliable process integration

Designed for both blind and through holes in steel, ductile cast iron (GGG) and non‑ferrous metals, this reamer is suitable for use in modern CNC and NC machining centres. For highest process reliability and minimal scrap rates, pair the tool with a high‑accuracy chucking system; the axial stability of a cylindrical shank supports consistent concentricity. Where dimensional tolerances and surface finish are critical, the use of precision holders enhances the achievable tolerance band and contributes to shorter set‑up times and fewer adjustments during production.

For tailored technical advice on integrating TECWERK NC reamers into production and to arrange supply from Metav Werkzeuge in Emmerich, please contact Metav Werkzeuge by eMail at info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical data

• Article number: 2000865305NW
• UID: 2000865305NW
• Manufacturer: TECWERK
• Packaging unit: 1

Core dimensions

• Diameter: 4.5 mm
• Tolerance: H7
• Standard: DIN 212-3
• Form: B

Special features

• Material: HSS‑Co (cobalt high‑speed steel)
• Right‑hand cutting
• Left‑hand helix
• Helical flutes with unequal spacing
• Cylindrical shank
• For blind and through holes in steel, ductile cast iron (GGG) and non‑ferrous metals
• Intended for NC machine reaming
• Compatible with hydro‑expansion, high‑precision and shrink‑fit holders for high runout accuracy

FAQ

What diameter and tolerance does this reamer have?
The TECWERK NC machine reamer is 4.5 mm in diameter and specified for H7 tolerance to achieve precision fits.

Which materials can be machined with this tool?
The tool is suitable for steel, ductile cast iron (GGG) and non‑ferrous metals; the HSS‑Co composition supports these common workshop materials.

How does the flute design affect performance?
Helical flutes with unequal spacing promote improved chip evacuation and reduced vibration, improving surface finish and dimensional stability during reaming.

Can this reamer be used in CNC centres?
Yes, the reamer is intended for NC machine use and performs best when combined with hydro‑expansion, high‑precision or shrink‑fit holders for minimal runout.

Is the shank compatible with standard toolholders?
The cylindrical shank is designed for secure clamping in conventional chucking and holder systems used on machining centres.

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