20mm Cutter DIN 844 HR HSS-Co5 52mm Cutting Length 45° Chamfer Weldon Shank - TECWERK

Take advantage of the combination of HSS‑Co5 toughness, a short rigid design and a secure Weldon shank to achieve consistent, high‑quality results in demanding milling tasks; order the cutter directly via Metav Werkzeuge or ask our consultants if further specifications are required.

Schaftfräser DIN 844 Typ HR D.20mm – HSS‑Co5 four‑flute end mill by TECWERK, Weldon shank

the Schaftfräser DIN 844 Typ HR D.20mm is a short, four‑flute end mill in HSS‑Co5 made for robust slotting, profiling and plunge operations in tougher materials

• HSS‑Co5 for increased red hardness
• DIN 844 Type HR short design
• Four‑flute for improved surface finish
• Weldon shank with drive flat
• Centre‑cutting for plunge milling

Durable construction for heavy‑duty machining

The HSS‑Co5 composition delivers enhanced heat resistance and toughness compared with standard high‑speed steels, which supports sustained cutting under demanding conditions. Conforming to DIN 844 in a Type HR short form, the tool offers a 20 mm diameter with a 52 mm cutting length, providing a stable cutting geometry that reduces chatter and improves tool life. These material and dimensional choices are designed to maintain cutting performance when machining workpieces with elevated tensile strengths, while the four‑flute geometry balances material removal with surface quality. The specification for maximum usable tensile strength is given as ~800 N/mm² with an uncoated tool and ~1200 N/mm² when a coated variant is used, which guides selection for specific job requirements.

Versatile application and clear material suitability

The tool is tailored for general machining tasks where a robust cutter is required: suitability is listed as very good for steel and cast iron, and conditional for non‑ferrous metals. The centre‑cutting geometry enables controlled plunge milling as well as conventional peripheral milling, so pockets and slots can be produced without auxiliary pre‑drilling in many setups. The four‑flute layout improves surface finish on through cuts and reduces burr formation, whereas the right‑hand cutting direction ensures conventional chip evacuation on most machines. These traits make the cutter appropriate for workshops and production environments that prioritise repeatable results across mixed batches of medium‑to‑high strength materials.

Secure clamping and optimised cutting behaviour

A Weldon shank with an integrated drive flat provides positive anti‑rotation in holders and collets, increasing operational safety during interrupted cuts and heavy engagement. The short form and the relief‑ground fine helix profile enhance rigidity and distribute cutting loads more evenly across the flutes, contributing to a finer surface finish and reduced tendency to chatter. A 45° protective chamfer protects the leading edge during handling and initial engagement, while the right‑hand cutting orientation is suitable for standard machine spindle directions. Overall, the geometry and shank design facilitate dependable clamping, repeatable positioning and efficient chip control for routine and demanding milling operations.

For expert advice or to procure the TECWERK HSS‑Co5 end mill with Weldon shank, contact Metav Werkzeuge in Emmerich; Metav’s consultants can confirm suitability for specific applications and arrange prompt delivery.

Technical data

• Article number: 2000866504NW
• Description: Schaftfräser DIN 844 Type HR, HSS‑Co5, D 20 mm, cutting length 52 mm
• Packaging unit: 1

Facts

• Diameter: 20 mm
• Cutting length: 52 mm
• Material: HSS‑Co5
• Standard: DIN 844
• Flutes: 4
• Max tensile strength uncoated: ~800 N/mm²
• Max tensile strength coated: ~1200 N/mm²

Special features

• Four‑flute geometry
• Centre‑cutting for plunge capability
• Weldon shank with drive flat
• Short design (Type HR)
• 45° protective chamfer
• Relief‑ground fine helix profile
• Right‑hand cutting
• Very good suitability for steel and cast iron
• Conditional suitability for non‑ferrous metals

FAQ

Is this cutter suitable for plunge milling?
The cutter is centre‑cutting, so plunge milling is supported and the tool can be used for pocketing and some plunge operations provided the machining parameters are set accordingly.

Which materials are best machined with this end mill?
This HSS‑Co5 end mill is rated very good for steel and cast iron, with conditional suitability for non‑ferrous metals; machining of tougher alloys should consider a coated variant for higher tensile strengths.

How does the Weldon shank benefit clamping?
The Weldon shank with drive flat ensures secure, anti‑rotation clamping in tool holders, which is particularly beneficial for interrupted cuts and heavy‑engagement milling.

Can the tool be used on parts with high tensile strength?
With an uncoated tool the specified guidance is up to ~800 N/mm²; using a coated equivalent extends the guidance to ~1200 N/mm², allowing selection based on workpiece tensile strength.

What surface finish can be expected from the cutter?
The four‑flute arrangement combined with the relief‑ground fine helix profile is designed to improve surface finish on through cuts and minimise burrs in many applications.

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