20mm Cylindrical Shank End Mill HSS-Co8 4-Flute Long 89mm Cutting Length Right-Hand DIN 844 - TECWERK

Take advantage of a long, DIN‑844 Type N design combined with HSS‑Co8 toughness and a secure Weldon shank to maintain consistent production quality. The 20 mm diameter and 89 mm effective cutting length deliver stable chip control and repeatable results in demanding milling of steel and cast iron — order directly through Metav Werkzeuge or contact our consultants for technical advice.

TECWERK End Mill DIN 844 Type N — 20 mm HSS‑Co8, 4 flutes, Weldon shank

The TECWERK end mill DIN 844 Type N is a long, four‑flute cylindrical end mill in HSS‑Co8, designed for milling steel and cast iron where extended reach and robustness are required

• Long effective cutting length 89 mm
• HSS‑Co8 for high wear resistance
• Four‑flute geometry for smooth chip evacuation
• Weldon shank for secure tool holding

Consistent cutting performance for steel and cast iron

The long‑reach geometry specified by DIN 844 delivers predictable rigidity and vibration control for deeper and extended milling operations. The HSS‑Co8 composition combines high‑speed steel with cobalt to improve heat resistance and edge life compared with standard HSS, making the tool very good for steel and very good for cast iron. The four‑flute design balances material removal rate and surface finish, while the centre cutting capability allows plunge starts in many applications. This combination reduces tool changes and contributes to a smoother production flow.

Designed for reliable clamping and tool stability

A Weldon shank with drive flat provides positive holding in collets and chucks, reducing slippage during heavy cuts and when using extended overhangs. The 20 mm diameter and matching 20 mm shank maintain concentricity at speed, and the right‑hand cutting orientation suits standard spindle directions. The long overall length and 89 mm effective cutting length are optimised for tasks where reach is essential; the secured shank geometry helps keep run‑out low, which in turn supports consistent surface quality and tool life.

Material suitability and machining guidance

Rated for uncoated use up to approx. 800 N/mm² and, where coated variants are used, up to about 1,200 N/mm², this tool supports a broad range of workshop tasks. The cutter is conditionally suitable for non‑ferrous metals and stainless steels, while excelling with carbon and cast irons. For best results, select cutting parameters that respect the tool's four‑flute geometry: moderate feeds to maintain chip evacuation and coolant where appropriate to extend edge life. For specific spindle speeds and feed per tooth recommendations, Metav Werkzeuge can provide tailored guidance based on the machine and material.

For reliable long‑reach milling choose TECWERK’s HSS‑Co8 end mill and contact Metav Werkzeuge for detailed machine‑specific recommendations or to place an order — eMail info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• SKU: 2000866390NW
• Product: TECWERK end mill DIN 844 Type N, HSS‑Co8, Weldon
• Standard: DIN 844

Core data

• Diameter: 20 mm
• Overall length: 141 mm
• Effective cutting length: 89 mm
• Shank diameter: 20 mm
• Number of flutes: 4
• Cutting direction: Right‑hand
• Free grind: 19 mm

Special features

• Type N long cylindrical end mill
• Centre cutting
• Weldon shank with drive flat
• HSS‑Co8 material
• Very good for steel
• Very good for cast iron
• Conditional suitability for non‑ferrous metals
• Conditional suitability for stainless steel (INOX)

FAQ

What materials is this end mill best suited for?
The TECWERK end mill (DIN 844 Type N, SKU 2000866390NW) is very good for steel and very good for cast iron, with conditional suitability for non‑ferrous metals and stainless steel

Can this tool be used for plunge milling?
Yes, the centre‑cutting geometry permits plunge starts; the long Type N design supports extended reach operations

What clamping system is recommended for this cutter?
Use secure clamping with a suitable holder that accepts a Weldon shank to ensure minimal slippage and low run‑out during heavy cuts

Is a coated version necessary for harder materials?
A coated variant increases allowable workpiece strength up to about 1,200 N/mm²; uncoated use is rated up to approx. 800 N/mm²

How many flutes and what benefits do they provide?
Four flutes balance higher material removal and improved surface finish while aiding chip control in steels and cast iron

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