20mm Countersink Milling Cutter HSS-Co8 DIN 844 Type N 3-Flute Long, Weldon Shank - TECWERK

Taking advantage of the combination of HSS‑Co8 high‑cobalt cutting geometry and a Weldon 20 mm shank ensures reliable clamping and consistent slotting performance across workshop production; order the cutter via Metav Werkzeuge or consult the team for application guidance.

TECWERK long slotting cutter, DIN 844 Type N — HSS‑Co8, Weldon shank, 3‑flute centre‑cutting

A long, centre‑cutting slotting cutter by TECWERK designed for deep groove and keyway machining in low‑ to medium‑strength steels and cast materials, supplied with a cylindrical shank and drive flat for secure clamping

• HSS‑Co8 cobalt high‑speed steel construction
• DIN 844 Type N, centre‑cut, 3 flutes
• Weldon cylindrical shank with drive flat
• Suitable for steel up to 800 N/mm² uncoated

Higher throughput thanks to robust cutting geometry

The long three‑flute design made from HSS‑Co8 delivers a balance of toughness and wear resistance that supports productive cutting cycles. As a centre‑cutting tool, it permits plunge entry without the need for pre‑drilling, reducing setup time and cycle complexity. The three‑flute configuration provides stable chip evacuation while preserving edge life, which translates into fewer interruptions during batch production and a smoother process flow for repetitive slotting tasks.

Secure clamping reduces runout and improves surface quality

Equipped with a Weldon style cylindrical shank and a 20 mm diameter, the cutter affords positive engagement in standard toolholders and collets. The incorporated drive flat enhances torque transmission, lowering the risk of slippage under cutting forces. This robust shank arrangement contributes directly to consistent concentricity and a better surface finish in the machined groove, supporting quality‑sensitive applications in workshop and light industrial settings.

Wide material suitability for versatile workshop use

The tool is optimised for machining steels of low to medium strength with very good suitability for cast iron; stainless steel and non‑ferrous metals are conditionally suitable. With an uncoated edge it supports materials up to around 800 N/mm², and when combined with appropriate coatings the capability increases to approximately 1,000 N/mm². This range makes the cutter suitable for common keyway, slotting and groove operations across maintenance, prototyping and small‑batch production.

Design choices that reduce setup and tooling variety

The long variant permits deeper pass depths without multiple tool changes, which simplifies fixture planning and reduces the number of operations required for deep features. Centre‑cut capability avoids the extra cycle of drilling a pilot hole for many slotting tasks, and the combination of HSS‑Co8 and three cutting edges maintains balance between toughness and wear resistance. For workshops seeking fewer specialised tools with broad applicability, this cutter offers a pragmatic mix of reach, rigidity and cutting performance.

Contact Metav Werkzeuge for tailored advice on the TECWERK long slotting cutter with HSS‑Co8 and Weldon 20 mm shank — Metav Werkzeuge is available in Emmerich by email at info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical Data

• Article number: 2000866242NW
• Manufacturer: TECWERK
• Item designation: Long slotting cutter, DIN 844 Type N, HSS‑Co8, Weldon shank
• Packaging unit: 1

Core dimensions

• Shank diameter: 20 mm
• Relief length (free grind): 19 mm
• Nominal diameters: 9, 11, 13, 15 mm (tolerance h10); remaining diameters tolerance e8
• Number of flutes: 3
• Cutting direction: right‑hand
• Material strength capability: up to 800 N/mm² uncoated; approx. 1,000 N/mm² with coating

Materials & special features

• Material: HSS‑Co8 (8% cobalt)
• Centre‑cutting (Zentrumschnitt)
• Cylindrical shank with drive flat (Weldon style)
• Long version for deeper grooves
• Three‑cutting‑edge design (Dreischneider)
• Very good suitability: steel, cast iron
• Conditional suitability: stainless steel, non‑ferrous metals

FAQ

What machining tasks is this cutter best suited for?
The TECWERK long slotting cutter (DIN 844 Type N, SKU 2000866242NW) is intended for slotting, keyway and groove machining in low to medium strength steels and cast parts where deep cuts or plunge entry are required.

Can the cutter be used for stainless steel and aluminium?
Yes, the tool can machine stainless steel and non‑ferrous metals on a conditional basis; for harder materials or higher material strengths a coated grade or adjusted cutting data is recommended for the TECWERK three‑flute cutter.

How does the Weldon shank improve performance?
The Weldon cylindrical shank with drive flat provides positive torque transmission and reduces slippage in the holder, improving concentricity and surface finish when using the TECWERK long centre‑cutting cutter.

Is the cutter suitable for plunge cutting?
Yes, the centre‑cutting geometry enables plunge operations, which eliminates the need for a pilot drill in many slotting scenarios and reduces setup time.

What diameters and tolerances are available?
Nominal diameters available include 9, 11, 13 and 15 mm with tolerance h10; other diameters are supplied to tolerance e8 as specified for this cutter.

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