4mm Long Shank End Mill HSS-Co8 TiCN 19mm Effective Length, DIN 844 - TECWERK

Benefit from the combination of a HSS‑Co8 backbone and a hard TiCN coating for extended tool life and consistent plunge performance; the long design and Weldon shank ensure secure clamping and access to deep features. Order the cutter directly via Metav Werkzeuge or request advice from our specialists for application-specific guidance.

TECWERK D844 Type N — 4 mm HSS‑Co8 TiCN end mill (long, 4‑flute)

The TECWERK D844 Type N 4 mm end mill is a long, centre‑cut, 4‑flute cutter designed for precision milling and safe plunge operations in steels and stainless materials.

• Long 4‑flute HSS‑Co8 design
• TiCN coating for increased wear resistance
• Centre‑cut for safe plunge milling
• Weldon shank, 6 mm for secure clamping

High‑performance cutting for demanding steels and stainless

The long, 4 mm diameter cutter is made from HSS‑Co8, offering a balance of toughness and heat resistance that suits interrupted cuts and higher feeds. The TiCN surface increases surface hardness and reduces adhesive wear, enabling machining of tougher materials up to about 1200 N/mm² when coated, while uncoated performance remains suitable up to roughly 800 N/mm². Conforming to DIN 844 and featuring a centre‑cut geometry, this tool allows both conventional milling and controlled plunge cutting; this reduces the need for separate roughing tools and streamlines job setups, improving throughput in small‑batch and production environments.

Secure clamping and reach for deep features

A Weldon shank with a 6 mm diameter provides strong, slip‑resistant clamping for CNC toolholders and milling arbors, while the generous overall length of 63 mm and an effective length of 19 mm make the cutter suitable for pockets and step features that require extra reach. The four cutting edges spread cutting forces more evenly than two‑flute cutters, which supports higher feed rates and a finer surface finish on workpieces of moderate hardness. Right‑hand cutting and the geometry optimised for a long tool form reduce chatter risk when appropriate feeds and speeds are applied, contributing to repeatable dimensional results.

Predictable lifetime and efficient production

With four flutes and a robust substrate, this long end mill offers a favourable compromise between chip evacuation and cutting edge strength, making it a cost‑effective option for general workshop to industrial tasks. The TiCN coating not only extends tool life in abrasive or slightly adhesive conditions but also improves surface quality, so fewer finishing passes may be required. Built to the DIN 844 standard, the cutter integrates smoothly into established tool inventories and allows predictable replacement cycles. For production planners and toolroom managers, this means reduced downtime, fewer tool changes and a more consistent part quality over extended runs.

For procurement advice or to request further technical data on the TECWERK D844 Type N 4 mm end mill (SKU 2000866394NW), please contact Metav Werkzeuge in Emmerich by phone or email for fast, expert support.

Technical data

• Article number: 2000866394NW
• Manufacturer: TECWERK
• Product type: End mill
• Standard: DIN 844
• Material: HSS‑Co (HSS‑Co8)
• Coating: TiCN

Facts

• Diameter: 4 mm
• Overall length: 63 mm
• Effective length: 19 mm
• Cutting length: 4 mm
• Shank diameter: 6 mm
• Flutes: 4
• Cutting direction: Right‑hand

Special features

• DIN 844 · Type N · long
• Centre‑cut (plunge‑capable)
• Weldon shank with drive flat
• Cylindrical shank with drive flat
• Zentrumschnitt (centre‑cut) for plunging
• Suitability: Steel very well suited; Stainless steel very well suited; Cast iron very well suited; Non‑ferrous metals conditionally suitable; Special alloys conditionally suitable
• For materials up to ~800 N/mm² uncoated, ~1200 N/mm² with coating

FAQ

What materials is this cutter best suited for?
The TECWERK D844 Type N end mill is very well suited to steel, stainless steel and cast iron; non‑ferrous metals and special alloys are conditionally suitable depending on cutting data and workpiece conditions.

Can the tool perform plunge cuts?
Yes — the centre‑cut geometry allows safe plunge milling; the D844 Type N design supports controlled vertical entry into the workpiece.

What clamping system is recommended for this item?
Use a secure Weldon‑type holder or compatible collet with drive flat for the 6 mm shank to avoid slippage and ensure accurate run‑out.

How does the TiCN coating affect performance?
The TiCN coating increases surface hardness and wear resistance, extending service life and permitting machining of higher tensile strength materials (coated performance up to ~1200 N/mm²).

Is this cutter suitable for CNC production?
Yes — the long 4‑flute geometry and HSS‑Co8 substrate make it suitable for CNC milling where a balance of tool life, surface finish and feed capacity is required; refer to machine and fixture rigidity when setting speeds and feeds.

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