21mm Core Drill HSS 30mm Cutting Depth Weldon Shank - Ruko GmbH

Take advantage of a robust HSS construction combined with a 30 mm cutting depth and a Weldon 19.05 mm (3/4") shank for secure, repeatable bore production. The combination of six cutting edges and a short overall length ensures fast material removal with controlled chip evacuation. Order the annular cutter directly via Metav Werkzeuge or ask the consultants for application advice.

RUKO Annular Cutter D 21 mm — HSS core drill, 30 mm cutting depth

The RUKO Annular Cutter D 21 mm is a high‑performance core drill designed for creating precise bores in structural steel, castings and non‑ferrous alloys with minimal setup time.

• High-speed steel construction for durability
• 30 mm cutting depth for efficient bore-making
• 6 cutting edges for fast material removal
• Weldon shank 19.05 mm (3/4") for secure clamping

Dependable cutting performance for industrial workshops

Manufactured from HSS, this annular cutter delivers a balance of toughness and edge retention suited to repetitive metalworking tasks. The geometry with 6 cutting edges reduces cutting forces and supports rapid chip formation, which translates into shorter cycle times on magnetic drilling machines and drill presses. For operations where consistent hole quality matters—such as fabrication of T‑sections, structural plates and frame assemblies—the design offers predictable dimensional accuracy and repeatability.

Secure clamping and fast tool changes

The Weldon shank design (19.05 mm / 3/4") enables direct clamping in common holders and adapters, offering a rigid connection that limits runout and vibration. This secure interface reduces the need for excessive rework and supports safer operation under higher feed rates. The short overall length assists in maintaining tool stability, making the cutter particularly effective in constrained setups where reach and clearance are limited.

Versatility across common workshop materials

This cutter is suited for machining steel, castings, aluminium and other light or non‑ferrous metals, providing a single‑tool solution for mixed‑material jobs. The specified 30 mm cutting depth is sufficient for many through‑hole and blind‑hole applications in plate and profile work without unnecessary overreach. For projects requiring a balance of speed and hole finish, the tool’s geometry optimises both material removal and surface quality.

Practical benefits for productivity and maintenance

With a compact overall length of 63 mm and a focus on efficient chip evacuation, the tool reduces downtime linked to clearing swarf and changing inefficient cutting media. The annular cutter’s construction emphasises serviceability: regrinding and maintenance routines are straightforward for workshops equipped to service high‑speed steel tooling, extending usable lifetime and improving cost efficiency per hole produced.

Discuss application specifics or request delivery details from Metav Werkzeuge to secure reliable supply and expert guidance directly from Emmerich.

Technical data

• Article number: 4000602300NW
• Product type: Annular cutter
• Manufacturer: Ruko GmbH

Facts

• Diameter: 21 mm
• Cutting depth: 30 mm
• Overall length: 63 mm
• Shank diameter: 19.05 mm (3/4")
• Cutting edges: 6
• Packing unit: 1

Special features

• HSS high‑speed steel
• Suitable for steel, castings, non‑ferrous and light metals
• Weldon shank for secure clamping

FAQ

What machine types are suitable for this annular cutter?
The RUKO annular cutter is designed for use on magnetic drilling machines and drill presses that accept a Weldon shank, providing stable performance on commonly used industrial portable and bench systems.

Can this cutter be used on stainless steel?
The cutter is optimised for steel and castings as well as non‑ferrous metals; for stainless steels or highly alloyed materials a dedicated grade or coating may be preferable to maintain tool life.

How does the Weldon shank benefit clamping reliability?
The Weldon shank (19.05 mm / 3/4") offers positive lateral engagement, which reduces slippage and runout during heavy feeds and improves hole concentricity compared with smooth‑shank options.

Is re-sharpening recommended for this tool?
Regrinding of HSS annular cutters is possible and can restore cutting performance; local tool service centres can assess wear and perform profile regrinds to extend service life.

What hole quality can be expected with this cutter?
When used with appropriate feeds, speeds and coolant, the cutter achieves accurate, clean bores suitable for through and blind holes in plates and profiles typical of fabrication tasks.

Manufacturer/Responsible: Ruko GmbH Präzisionswerkzeuge, Robert‑Bosch‑Strasse 7, 71088 Holzgerlingen