3–14 / 5–20 / 16–30.5mm Sheet Metal Countersink Set HSS-Co5, 4pc ABS Case - Ruko GmbH

Take advantage of the combination of durable HSS‑Co5 construction, broad diameter coverage and a robust storage solution for efficient, low‑downtime sheet‑metal production. Order the set via Metav Werkzeuge or consult our experts for application‑specific advice.

RUKO sheet metal step drill set 3–14 / 5–20 / 16–30.5 mm, HSS‑Co5, 4‑piece (ABS case)

RUKO sheet metal step drill set is a compact multi‑range solution for drilling and deburring thin metal panels in workshop and light industrial environments

• HSS‑Co5 for high wear resistance
• Three step ranges 3–14 / 5–20 / 16–30.5 mm
• Shank with 3 flats for secure clamping
• ABS cassette with 30 g cutting paste included

Consistent hole quality and extended tool life for production runs

Manufactured from HSS‑Co5, this cutter set delivers enhanced wear resistance and thermal stability compared with standard high‑speed steels. The cobalt alloy sustains sharper cutting edges for longer, which reduces the frequency of tool changes and contributes to a more predictable production flow. For operations where repeatable hole dimensions and surface finish matter, the combination of alloy composition and stepped geometry ensures neat, deburred apertures across a wide range of diameters while preserving machining time.

Faster set‑up and reliable chuck grip reduce scrap rates

The shank with 3 flats provides an immediate improvement in clamp stability, lowering the risk of slippage in standard chucks and torque‑transfer devices. Secure clamping minimises run‑out and vibration, which in turn improves concentricity and reduces heat build‑up at the cutting edge. The included 30 g cutting paste supports smoother chip evacuation and helps to control temperature during prolonged cycles, enabling longer uninterrupted runs and fewer rejects during sheet‑metal processing.

Compact storage and maintenance that keeps workshops running

Delivered in a shock‑ and break‑resistant ABS cassette, the set is organised for rapid tool selection and safe transport between bench and machine. The cassette protects cutting edges from incidental damage and prevents loss of small consumables, helping to reduce unplanned downtime. Regular application of the supplied cutting paste and correct storage in the cassette preserve tool geometry and reliability, simplifying maintenance routines and extending the effective service life of the cutters.

Broad diameter coverage for flexible workshop applications

With stepped diameters covering 3–14 mm, 5–20 mm and 16–30.5 mm, the set replaces multiple individual drills and suits a range of sheet‑metal tasks from pilot holes to larger access openings. The design supports work on common sheet materials and makes the set a practical choice for technicians who value adaptability without compromising on edge quality. For production or repair shops seeking a compact, resilient drilling solution, this cutter set offers a clear blend of performance and operational simplicity.

Contact Metav Werkzeuge for tailored advice on the RUKO HSS‑Co5 sheet metal step drill set and secure supply from Emmerich—email info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• Article number: 4000601699NW
• Name: Sheet metal step drill set 3–14 / 5–20 / 16–30.5 mm, HSS‑Co5, 4 pcs, RUKO
• Manufacturer: Ruko GmbH
• Packaging unit: 1

Core technical data

• Diameter ranges: 3–14 mm; 5–20 mm; 16–30.5 mm
• Number of pieces: 4 (3 cutters + cutting paste)
• Material: HSS‑Co5 (cobalt high‑speed steel)
• Cutting paste: 30 g

Special features

• Shank with 3 flats for secure clamping
• Shock‑ and break‑resistant ABS cassette
• Packaging: ABS plastic cassette
• Includes 30 g cutting paste

FAQ

What materials is this step drill set suited to?
The RUKO sheet metal step drill set is optimised for thin metal panels and common sheet‑metal applications; the HSS‑Co5 composition offers improved wear resistance for repeated drilling tasks.

How does the shank design affect performance?
The shank with 3 flats ensures a more secure clamp in standard chucks, reducing slippage and run‑out during machining with the RUKO set (SKU 4000601699NW).

Is cutting lubricant included and why is it needed?
Yes — the set includes a 30 g cutting paste to support chip evacuation and temperature control, which helps preserve the cutting edge and improve hole finish.

Can the cutters be stored in the supplied cassette on site?
The supplied ABS cassette is shock‑ and break‑resistant and designed for organised storage and safe transport between workbench and machine.

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