12mm Spiral Slot Cutter HSS-Co8 3-Flute Long 11.5mm Relief, DIN 844 Weldon - TECWERK

High-performance HSS‑Co8 construction and a Weldon shank provide stable clamping and long tool life, while the three‑flute, centre‑cut geometry enables precise slotting and plunge milling; order the TECWERK three‑flute centre‑cut slot drill 12 mm directly via Metav Werkzeuge or ask our consultants if needed

TECWERK slot drill DIN 844 Type N, 12 mm — HSS‑Co8, Weldon shank

The TECWERK slot drill is a long, centre‑cutting three‑flute tool engineered for slotting and groove milling in medium‑strength steels and cast iron

• HSS‑Co8 high‑speed steel
• Three‑flute centre‑cut geometry
• Weldon shank for secure clamping
• Suitable for steels up to 800 N/mm²

Precision and material performance for consistent machining

Manufactured from HSS‑Co8, this long centre‑cut slot drill delivers a balance of toughness and wear resistance suitable for demanding shop use. The three‑flute design reduces vibration and produces cleaner slot walls compared with two‑flute cutters, while the centre‑cutting geometry allows controlled plunging into the workpiece. For processes where tool life and repeatable results matter, the alloyed high‑speed steel provides a reliable compromise between hardness and fracture resistance, supporting continuous operation in many workshop applications.

Secure clamping and accessibility in deeper slots

The Weldon shank and cylindrical shaft with drive flat ensure positive torque transmission and minimise slippage in the holder, which is particularly important during interrupted cuts or when machining deeper grooves. With an overall length of 83 mm and an effective length of 36 mm, the long version gives additional reach without sacrificing rigidity. The 12 mm shank diameter and precise shank geometry support stable toolholding, reducing runout and improving surface finish on the machined slot.

Application range and material suitability explained

This cutter is specified for machining materials up to steel ~800 N/mm² with uncoated tooling and up to 1000 N/mm² when used with appropriate coatings, offering a clear guideline for process planning. It is very well suited for steel and cast iron slotting, conditionally suitable for stainless and non‑ferrous metals, and can be used for light finishing and keyway milling in many common workshop tasks. The right‑hand cutting direction and three cutting edges support effective chip evacuation and reliable material removal in typical milling operations.

For tailored machining advice and secure supply of the TECWERK slot drill, contact Metav Werkzeuge in Emmerich — eMail: info@metav-werkzeuge.com or Tel: +49 2822 7131930 — our consultants will assist with selection and delivery

Technical data

• Article number: 2000866234NW
• Manufacturer: TECWERK
• Product type: Slot drill (type N)
• Material: HSS‑Co8

Facts

• Nominal diameter: 12 mm
• Overall length: 83 mm
• Effective length: 36 mm
• Cutting length: 3 mm
• Shank diameter: 12 mm
• Number of cutting edges: 3
• Free grind: 11.5 mm
• Cutting direction: right‑hand cutting
• Standard: DIN 327

Special features

• Centre‑cutting geometry for plunge capability
• Weldon shank (drive flat) for secure clamping
• Long design for extended reach
• Good suitability for steel and cast iron
• Conditional suitability for stainless and non‑ferrous metals
• Recommended for slotting, keyways and groove milling

FAQ

What materials can this slot drill machine reliably process?
The TECWERK slot drill, SKU 2000866234NW, is very well suited to steel and cast iron; it is conditionally suitable for stainless steel and non‑ferrous metals, with recommended limits around 800 N/mm² uncoated and up to 1000 N/mm² with appropriate coatings.

Can the cutter be used for plunging as well as slotting?
Yes, the centre‑cutting three‑flute geometry permits controlled plunging operations in addition to conventional slotting and groove milling.

Which shank type does the tool use and why does it matter?
A Weldon shank with drive flat provides positive torque transmission and reduces the risk of slippage in the tool holder, improving stability during interrupted cuts.

Is this tool suitable for finishing passes?
The cutter can perform light finishing, but its primary design focuses on slotting and rough‑to‑semi‑finish operations; finishing results depend on machine rigidity and cutting parameters.

How many flutes does the cutter have and what is the machining benefit?
The tool features three cutting edges, which improve chip control and surface quality compared with two‑flute variants while maintaining effective chip evacuation.

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