31mm Core Drill HSS 30mm Cutting Depth Weldon Shank 3/4" - Ruko GmbH

Take advantage of the combination of high-performance HSS construction, a 31 mm cutting diameter and a secure Weldon shank for reliable, fast holemaking in a range of metals. Order the tool directly via Metav Werkzeuge or consult the technical team for application advice.

Annular cutter Ø31 mm HSS – 30 mm cutting depth, Weldon shank (Ruko)

The Annular cutter Ø31 mm HSS is a high-performance core drill designed for efficient holemaking in steel, cast iron and non‑ferrous metals with a robust Weldon shank for secure clamping

• High-speed steel construction
• 31 mm diameter for larger holes
• 30 mm effective cutting depth
• Weldon shank 19.05 mm (3/4")

Faster, more economical holemaking for structural work

The HSS construction offers a dependable balance of toughness and edge retention, making the cutter well suited to demanding tasks in structural steel, large plates and cast components. With a 31 mm diameter and a 30 mm cutting depth, the tool removes the need for multiple pilot drills and reduces machining time compared with conventional twist drills. The design with 8 cutting edges supports clean shearing action, which helps to lower cycle times and improves repeatability in production runs. For operations where throughput matters, this tool delivers measurable efficiency gains while maintaining consistent hole quality.

Secure clamping and reliable chip control for cleaner results

The Weldon shank (19.05 mm / 3/4") ensures firm seating in compatible holders and magnetic drill chucks, reducing vibration and increasing axial stability during cutting. Stable clamping combined with the cutter geometry promotes efficient chip evacuation, which in turn produces clean holes with reduced burr formation and less rework. The shorter cutting depth concentrates cutting forces, allowing lower power draw on portable magnetic drills and stationary units alike; this improves operator control and prolongs tool life under repetitive use.

Integrates smoothly into workshop workflows and maintenance routines

Designed as a drop-in solution for standard Weldon holders, the tool simplifies tooling changes and minimises setup downtime. The combination of HSS material and the cutter’s geometry means resharpening is an option when wear occurs, extending service life and reducing long‑term tooling costs. For specific workpiece alloys or unusual applications, Metav’s technical advisers can provide guidance on feeds, speeds and coolant strategy to optimise performance. The result is a practical, durable cutting solution that supports steady production and consistent results.

Choose Ruko quality for dependable core drilling and contact Metav Werkzeuge for tailored advice and reliable supply from Emmerich: info@metav-werkzeuge.com | +49 2822 7131930

Technical data

• Article number: 4000602310NW
• Label: Kernbohrer D.31mm HSS Schnitt-T.30mm Weldon RUKO
• Manufacturer: Ruko GmbH
• Packaging unit: 1

Core technical data

• Diameter: 31 mm
• Cutting depth: 30 mm
• Total length: 63 mm
• Cutting edges: 8
• Shank: 19.05 mm (3/4")

Materials & features

• Material: HSS
• Shank type: Weldon shank
• Suitable for: steel, cast iron, non‑ferrous and light metals

FAQ

Is this annular cutter compatible with magnetic drills?
The cutter is supplied with a Weldon shank (19.05 mm / 3/4"), which fits common Weldon holders used on magnetic drills and many portable drill stands.

Which materials can be machined with this tool?
The Ruko annular cutter is intended for steel, cast iron, non‑ferrous and light metals, offering reliable performance across these common workshop applications.

Can the cutter be resharpened?
Yes, the HSS construction allows professional resharpening when the cutting edges become dull, extending service life and reducing replacement frequency.

What holder or chuck size is required for the Weldon shank?
A Weldon holder or chuck accommodating a 19.05 mm (3/4") shank is required to secure the cutter safely and ensure correct axial alignment.

How many cutting edges does the tool have and why does that matter?
The design features 8 cutting edges, which supports efficient material removal and improved chip formation for cleaner holes and fewer burrs.

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