20mm Core Drill HSS 55mm Cut Depth Weldon Shank 3/4" - Ruko GmbH

Benefit from the combination of high-performance HSS construction and a secure Weldon 3/4" shank with 55 mm cutting depth to achieve reliable, repeatable core drilling in structural steel and non‑ferrous metals. Order the core drill directly via Metav Werkzeuge or ask our consultants for compatibility advice.

Core drill Ø20 mm HSS, 55 mm cutting depth – RUKO (Weldon shank)

The Core drill Ø20 mm HSS, 55 mm cutting depth, Weldon shank (RUKO) is a robust core drilling solution for producing clean holes in steel, cast components and non‑ferrous materials with a secure 3/4" Weldon connection.

• High-performance HSS construction
• 55 mm effective cutting depth
• Weldon shank 19.05 mm (3/4") secure fit
• Suitable for steel and non‑ferrous metals

Precision material and cutting geometry for consistent holes

Constructed from HSS, the core bit delivers a balance of wear resistance and edge stability that supports stable hole geometry under repeated use. The multi-edge design with 6 cutting edges distributes cutting forces evenly, which reduces the tendency for chatter and supports clean chip formation. This reliability in cutting behaviour translates into fewer scrapped parts and improved throughput on production and maintenance tasks.

Secure clamping and controlled penetration for workshop productivity

The Weldon shank 3/4" affords a positive, torque-resistant connection to standard holders and adaptors, ensuring consistent concentricity during drilling. With a 55 mm cutting depth and 88 mm overall length, the bit is configured for medium-depth through-holes in thicker sections while maintaining a compact overall footprint. The combination of secure clamping and conservative geometry reduces vibration and allows steady feed rates, improving cycle time without sacrificing hole quality.

Broad material compatibility to reduce tool changes

The design is suitable for a range of workpiece materials, including steel (for example T‑beams and large plate), cast steel and various non‑ferrous metals. This versatility reduces the need to swap tooling between common workshop applications, streamlining job preparation and lowering set-up time. When machining mixed material batches, a single core drill that reliably handles different substrates helps maintain production flow and keeps tooling logistics simple.

Practical guidance for sustained performance and hole quality

To maintain the bit’s performance, use appropriate cutting speeds and a suitable lubricant or coolant for the workpiece material to prevent overheating and edge rounding. Regular inspection of the cutting edges for wear will indicate when reconditioning or replacement is needed; worn edges increase cutting forces and degrade hole finish. For further advice on speeds, feeds or holder compatibility, technical assistance is available from Metav Werkzeuge via email or phone.

For product compatibility checks, technical advice or to arrange supply of the RUKO core drill, contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930 to discuss requirements and delivery options.

Technical data

• Article number: 4000602451NW
• Manufacturer: Ruko GmbH
• Product type: core drill
• Material: HSS
• Brand: RUKO

Dimensions & core data

• Diameter: 20 mm
• Cutting depth: 55 mm
• Overall length: 88 mm
• Shank diameter: 19.05 mm (3/4")
• Number of cutting edges: 6

Materials & features

• Weldon shank 19.05 mm (3/4")
• Suitable for steel, cast steel, non‑ferrous and light metals
• Packaging unit: 1

FAQ

Can this core drill be used on structural steel and large plate?
Yes. The Core drill Ø20 mm HSS, 55 mm cutting depth (RUKO, SKU 4000602451NW) is specified for work on steel, including T‑beams and large-format plate.

What shank size and type does the tool require?
The tool is supplied with a Weldon shank of 19.05 mm (3/4"), designed for secure clamping in compatible holders.

How deep can the bit cut in a single operation?
The specified cutting depth is 55 mm with an overall length of 88 mm, suitable for medium-depth core drilling tasks.

Is the bit suitable for aluminium and brass?
Yes. The core drill is suitable for non‑ferrous and light metals as well as steel grades listed in the product data.

How many cutting edges does the drill have and why does that matter?
The bit has 6 cutting edges; this geometry distributes cutting forces and helps produce cleaner holes with reduced vibration.

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