2.5mm NC Machine Reamer H7 Form B HSS-Co Right-Hand Spiral With Cylindrical Shank - TECWERK

Taking advantage of the HSS‑Co construction and H7 tolerance together with a cylindrical shank and variable‑pitch fluting ensures precise, repeatable fits and stable production runs; order or request expert advice directly via Metav Werkzeuge for tailored technical support.

NC machine reamer DIN 212‑3 H7 Form B, 2.5 mm, HSS‑Co — TECWERK

The NC machine reamer DIN 212‑3 H7 Form B is a right‑hand, helical‑fluted reamer designed for finishing through and blind holes in steel, ductile iron and non‑ferrous metals for high‑precision fit applications

• HSS‑Co for higher wear resistance and life
• Tolerance H7 for accurate fits
• Suited to steel, GGG and non‑ferrous metals
• Cylindrical shank with variable pitch

Consistent, high‑precision fits for serial production

The reamer delivers reliable H7 tolerances, enabling repeatable press and slip fits across batches. Manufactured from HSS‑Co, the tool maintains edge stability under heat and load, which reduces rework and scrap in high‑mix, high‑volume environments. Matching a precision finishing reamer with appropriate clamping systems translates into predictable component interchangeability and fewer downstream adjustments.

Durable construction for demanding materials and long tool life

The HSS‑Co composition provides improved hot‑hardness and wear resistance compared with standard high‑speed steel, making the tool suitable for machining steel, ductile iron (GGG) and a range of non‑ferrous metals. The material choice supports extended running times under elevated cutting speeds and when using flood or mist coolant, delivering lower tool consumption and steadier surface quality on finished bores.

Optimised flute geometry for stable cutting and surface quality

Helical fluting with a left‑hand helix and variable pitch reduces harmonic vibrations and promotes even chip formation, which improves concentricity and leaves a smoother bore. The tool’s right‑hand cutting action and unequal division of flutes balance cutting forces, reducing chatter and enhancing bore roundness. These geometric choices help achieve the dimensional and surface‑finish requirements typical for precision assemblies.

Seamless integration into CNC setups for maximum process security

When paired with hydro‑expansion, high‑precision collet or shrink‑fit chucks, the reamer contributes to extremely low runout and stable radial positioning, crucial for producing tight fits reliably on CNC lathes and machining centres. This compatibility reduces scrap rates, shortens cycle time for post‑processing and improves overall machine utilisation in automated production cells.

Contact Metav Werkzeuge today for application advice and to secure the TECWERK NC machine reamer for precise bore finishing — Metav Werkzeuge, Emmerich; eMail: info@metav-werkzeuge.com; Phone: +49 2822 7131930

Technical data

• Article number / SKU: 2000865301NW
• Item name: NC machine reamer DIN 212‑3 H7 Form B D.2.5 mm HSS‑Co TECWERK
• Brand: TECWERK
• Packaging unit: 1
• UID: 2000865301NW

Dimensions / core specifications

• Nominal diameter: 2.5 mm
• Tolerance: H7
• Form: B
• Shank: cylindrical
• Cutting direction: right‑hand

Special features / applications

• Material: HSS‑Co (cobalt high‑speed steel)
• Flute type: helical fluted, left‑hand helix
• Pitch: unequal division (variable pitch)
• Suitable for: steel, GGG (ductile iron), non‑ferrous metals
• Application: finishing of blind and through holes
• Compatibility: hydro‑expansion, high‑precision collet and shrink‑fit chucks for high runout accuracy
• Additional note: designed for NC machine use, optimised for process reliability and concentricity

FAQ

What hole types is the reamer intended for?
This reamer is designed for both through and blind holes; the geometry and materials support consistent finishing in both applications.

Which materials can be machined with this reamer?
The reamer is suitable for steel, ductile iron (GGG) and a range of non‑ferrous metals, leveraging the wear resistance of HSS‑Co for longer tool life.

How does variable pitch benefit machining?
Variable pitch (unequal division) reduces harmonic vibration and improves chip evacuation, resulting in better roundness and surface finish in produced bores.

Can the reamer achieve high runout accuracy in CNC setups?
Yes. When used with hydro‑expansion, high‑precision collet or shrink‑fit chucks, the tool enables minimal runout and high process security for precision fits.

Is this reamer suitable for automated NC production?
The tool is explicitly designed for NC machine applications and integrates well into automated workflows where stable tolerances and repeatability are required.

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