21mm Core Drill Solid Carbide 50mm Cutting Depth Quick IN Shank - Ruko GmbH

Take advantage of robust holemaking with a solid carbide core drill that combines precise 21 mm diameter cutting, a 50 mm cutting depth and a rapid Quick IN shank for efficient tool changes; order directly via Metav Werkzeuge or contact their advisors for application support.

Ruko core drill D 21 mm – solid carbide, 50 mm cutting depth, Quick IN shank

The Ruko core drill D 21 mm is a high-performance annular cutter designed for heavy-duty holemaking in demanding steels and rails; ideal for production and maintenance work where fast, reliable bore creation is required.

• Solid carbide body
• 50 mm cutting depth
• Quick IN 18 mm shank

High-performance cutting for demanding steels

The design delivers consistent material removal in high-strength alloys. With a 21 mm diameter and a 50 mm cutting depth, the cutter achieves fast productive cycles while keeping bore quality high. The six cutting edges distribute cutting forces evenly, reducing radial load and improving bore roundness. For users unfamiliar with annular cutters: unlike a twist drill, this tool removes only the material of the bore periphery, which results in lower power draw and shorter cycle times when creating holes in plate and profile work.

Rapid tool changes and stable clamping for workshop efficiency

A Quick IN shank accelerates changeover on compatible holders and magnetic drilling units. The Quick IN 18 mm shank ensures a secure fit without time-consuming adjustments; the result is less machine downtime and higher throughput on multi-hole jobs. The shank interface also supports repeatability of bore position, reducing setup errors in repetitive production runs and maintenance tasks on rails and structural steel.

Long service life through solid carbide construction

Constructed from solid carbide, the cutter offers outstanding wear resistance and thermal stability, making it suitable for sustained use on abrasive or high-alloy steels. The tool’s carbide composition helps retain cutting geometry under load, leading to longer intervals between reconditioning and fewer tool changes overall. For operations where tool longevity reduces total machining cost, this construction presents a clear efficiency advantage.

Application scope and handling guidance

Engineered for challenging materials, the cutter is suitable for railway rails, Hardox/Weldox 400, steel, cast steel and high-chromium alloys such as V2A and V4A. Proper clamping in a compatible Quick IN holder and the use of suitable cutting fluid for chip evacuation will maintain surface finish and extend tool life. For thin-walled components or non-standard setups, considerations for machine rigidity and support are recommended to ensure optimal hole quality and repeatability.

Secure robust, repeatable holemaking with Ruko’s solid carbide core drill—contact Metav Werkzeuge for tailored application advice and reliable supply from Emmerich: info@metav-werkzeuge.com, +49 2822 7131930

Technical Data

• Article number: 4000602629NW
• Label: Kernbohrer D.21mm Vollhartmetall Schnitt-T.50mm Quick IN RUKO
• Manufacturer: Ruko GmbH

Facts

• Diameter: 21 mm
• Cutting depth: 50 mm
• Overall length: 83 mm
• Cutting edges: 6
• Material: Solid carbide
• Shank: Quick IN 18 mm

Special features

• Suitable for railway rails and Hardox/Weldox 400
• Suitable for steel and cast steel
• Suitable for high-chromium steels (V2A, V4A) and higher alloys
• Quick IN shank design
• Packaging unit: 1

FAQ

What materials can this core drill machine through?
The answer: The Ruko core drill D 21 mm is specified for railway rails, Hardox/Weldox 400, steel, cast steel and high-chromium steels such as V2A and V4A, and other higher-alloy steels.

Is the shank compatible with magnetic drilling stands?
The answer: The Quick IN 18 mm shank is intended for rapid mounting in compatible holders and magnetic drilling units; compatibility with a specific stand depends on the holder interface.

How does an annular cutter differ from a twist drill for this application?
The answer: An annular cutter removes only the peripheral material of a hole, producing faster drilling with lower power consumption and improved hole quality compared with a conventional twist drill, especially in thick or high-strength plate.

What maintenance extends the tool life of this cutter?
The answer: Using suitable cutting fluid, ensuring rigid clamping in a Quick IN holder and avoiding excessive feed or run-out will preserve the cutting geometry of the Ruko core cutter and extend service intervals.

How many cutting edges does the tool have and why does that matter?
The answer: The tool features six cutting edges; more cutting edges spread cutting forces and reduce vibration, improving surface finish and bore roundness in demanding materials.

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