3.5mm NC Machine Reamer H7 Form B HSS-Co, Right-Hand Flute Cylindrical Shank - TECWERK

Benefit from HSS‑Co construction and H7 tolerance for precise fits; the left‑hand helical flutes improve chip control and process stability. Order the NC machine reamer directly via Metav Werkzeuge or ask our consultants if needed.

NC machine reamer DIN 212‑3, Form B — 3.5 mm HSS‑Co (TECWERK)

The NC machine reamer DIN 212‑3, Form B, 3.5 mm HSS‑Co is a CNC‑grade finishing tool for producing precise fits in blind and through holes across steels, ductile iron and non‑ferrous metals

• HSS‑Co for extended tool life
• Tolerance H7 for precise fits
• Left‑hand helical flutes for chip control
• Cylindrical shank with unequal spacing

Consistent bore accuracy for reliable fits

The combination of HSS‑Co substrate and tolerance H7 ensures repeatable dimensional results when finishing bores. Conformance to DIN 212‑3 and the use of Form B geometry provide a predictable cutting envelope, reducing rework and scrap rates. When the reamer is mounted in hydro‑expansion, high‑precision collets or shrink‑fit chucks, the achievable run‑out accuracy is improved, which directly raises process reliability for producing press fits or sliding fits on CNC machines.

Geometry and chip control that keep production moving

The tool’s helical flutes with a left‑hand helix and unequal flute spacing promote orderly chip formation and evacuation, decreasing the risk of jamming in through holes. Right‑hand cutting edges combined with the flute geometry produce a clean cutting action that supports surface finish requirements with minimal secondary operations. The cylindrical shank simplifies toolholding and repeatable setup in automatic tool changers, contributing to shorter cycle times and steadier throughput.

Broad material compatibility and machine integration

Designed for finishing both blind and through holes in steel, GGG (ductile iron) and non‑ferrous metals, the reamer suits many workshop and production environments. The HSS‑Co composition delivers heat and wear resistance for extended life across mixed batches, while the tool’s specification supports integration into high‑precision machining chains. Clear documentation of the standard and geometry aids planning and quality assurance in series production.

For application support and to secure this TECWERK NC machine reamer via Metav Werkzeuge, contact our specialists for tailored advice on mounting options and material pairings to ensure the required fit and process reliability.

Technical Data

• SKU: 2000865303NW
• Label: NC machine reamer DIN 212‑3 Form B 3.5 mm HSS‑Co
• Manufacturer: TECWERK
• Packaging unit: 1

Facts

• Diameter: 3.5 mm
• Tolerance: H7
• Standard: DIN 212‑3

Special features

• Material: HSS‑Co
• Form: B
• Cutting direction: right‑hand cutting
• Fluting: helical flutes, left‑hand helix
• Flute spacing: unequal spacing
• Shank: cylindrical shank
• Applications: blind and through holes
• Material suitability: steel, ductile iron (GGG), non‑ferrous metals
• Machine integration: compatible with hydro‑expansion, high‑precision collets and shrink‑fit chucks for improved run‑out accuracy and process reliability

FAQ

What hole sizes is this reamer suitable for?
The reamer is specified for a 3.5 mm nominal bore and is produced to H7 tolerance for precision fits; matching the cutter to the nominal hole ensures the intended fit class.

Can the reamer handle blind holes as well as through holes?
Yes, the geometry and flute design of this TECWERK NC machine reamer are intended for both blind and through holes in steels, ductile iron and non‑ferrous metals.

How does the tool achieve high run‑out accuracy?
When the reamer is used with hydro‑expansion, high‑precision collets or shrink‑fit chucks, the assembly minimises run‑out and improves the repeatability of fits in serial production.

Is the material suitable for aluminium and copper alloys?
The HSS‑Co composition and flute design are suitable for non‑ferrous metals, including aluminium and copper alloys, while maintaining surface finish and dimensional control.

What is the SKU for ordering and reference?
The SKU for this item is 2000865303NW, listed as NC machine reamer DIN 212‑3 Form B 3.5 mm HSS‑Co by TECWERK.

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