20mm Cylindrical Shank Roughing End Mill HSS-Co5 52mm Effective Length, DIN 844 - TECWERK

Take advantage of the combination of HSS‑Co5 material, a 4‑flute centre‑cutting geometry and a secure Weldon shank to ensure reliable, repeatable milling of medium‑strength steels; procure the tool directly via Metav Werkzeuge or consult our specialists for application‑specific advice.

TECWERK End Mill DIN 844 Type HR — 20 mm, HSS‑Co5, Weldon shank

The End mill DIN 844 Type HR, 20 mm, HSS‑Co5, Weldon is a short, high‑rigidity four‑flute cutter designed for precision milling of steels and cast materials in workshop and light industrial settings.

• HSS‑Co5 for improved wear resistance
• DIN 844 Type HR construction
• 4‑flute centre cutting geometry
• Weldon shank, 20 mm secure clamping

Consistent precision for medium‑strength steels

This cutter is manufactured from HSS‑Co5, offering a balance between toughness and hot‑hardness that benefits operations where sustained cutting temperatures occur. The DIN 844 Type HR specification defines a short, rigid design that reduces chatter and improves dimensional stability during interrupted cuts. With a 20 mm diameter and an effective length of 52 mm, the tool delivers repeatable slotting and shoulder milling while keeping runout and deflection to a minimum. The result is a predictable process that supports higher first‑pass yields and reduced scrap rates, which is particularly valuable in batch production.

Improved machining efficiency and chip control

The 4‑flute geometry combined with a fine helix profile and a centre‑cutting tip enables both peripheral milling and limited plunging, shortening setup times by eliminating the need for multiple tool changes. The cutter’s profile promotes orderly chip formation, easing evacuation in usual machining setups and lowering the risk of recutting chips. For practical workshops this translates into shorter cycle times and more consistent surface finishes when machining steels up to approximately 800 N/mm² with an uncoated tool. These properties support a clear cost‑efficiency argument: faster throughput with fewer reworks.

Secure clamping and user‑friendly handling

A Weldon shank with a positive drive flat provides reliable torque transmission and rapid tool changes in standard turret or collet systems. The 20 mm shank diameter matches common fixture standards, simplifying tool inventory and reducing downtime during swaps. The cutter’s 45° protection chamfer on the cutting edge improves corner strength and guards the leading edge during entry, lengthening in‑service life under typical shop conditions. This practical design choice reduces handling complexity and supports dependable repeatability on the shop floor.

Applications and recommended use

Engineered for versatile workshop use, the tool is very well suited to steel and cast materials and is conditionally suitable for some non‑ferrous metals. The short, robust geometry performs best in stable setups—rigid fixturing and controlled feeds deliver the greatest benefit. Given the uncoated state of the tool, consider a suitable coating on an equivalent grade for high‑speed or abrasive applications where machining up to 1,200 N/mm² is required. For users less familiar with tooling selection, the cutter provides a straightforward, reliable option for general‑purpose milling tasks.

Contact Metav Werkzeuge for tailored specification support and secure TECWERK HSS‑Co5 end mills for robust, precision milling — email info@metav-werkzeuge.com or call +49 2822 7131930 to discuss requirements and delivery from Emmerich.

Technical data

• Article number: 2000866504NW
• SKU: 2000866504NW
• Manufacturer: TECWERK
• Product type: End mill (Schaftfräser)
• Standard: DIN 844

Facts

• Diameter: 20 mm
• Overall length: 104 mm
• Effective length: 52 mm
• Cutting length: 4 mm
• Shank diameter: 20 mm
• Number of flutes: 4
• Relief: 19 mm
• Cutting direction: Right‑hand cutting

Special features

• Material: HSS‑Co5
• Type HR — short, rigid design
• Centre cutting geometry
• Weldon shank (with drive flat)
• 45° protection chamfer
• Fine, undercut helix profile
• Suitable for steel: very well suited
• Suitable for cast materials: very well suited
• Suitable for non‑ferrous metals: conditionally suitable

FAQ

What materials is this end mill best suited for?
The TECWERK End mill DIN 844 Type HR, 20 mm (SKU 2000866504NW) is very well suited for steel and cast materials and is conditionally suitable for some non‑ferrous metals under appropriate cutting data.

Can the cutter plunge or is it only for side milling?
Thanks to its centre‑cutting geometry and four flutes, the tool allows limited plunging as well as peripheral milling; however, best performance is achieved with controlled entry and a rigid setup.

What advantages does HSS‑Co5 provide for daily workshop use?
The HSS‑Co5 composition combines toughness and hot‑hardness, offering improved wear resistance and durability in intermittent milling tasks commonly found in workshop environments.

Is this end mill compatible with standard toolholders?
Yes, the Weldon shank with a drive flat is compatible with standard Weldon clamping systems and provides secure torque transmission for repeatable machining operations.

How long is the effective cutting length and what does that mean in practice?
The cutter has an effective length of 52 mm, which defines the usable cutting portion for axial engagement and influences maximum depth of cut while keeping rigidity high.

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