6-37mm Step Drill HSS-Co5 Spiral Fluted, 118° Tip 90° Step Angle, Two Cutting Edges - Ruko GmbH

Take advantage of a durable HSS‑Co5 construction combined with a spiral flute and cross‑cut tip to achieve smooth, progressive hole enlargement from 6–37 mm; the 12‑step geometry and three‑flat shaft ensure predictable clamping and consistent concentricity. For purchase or technical consultation, order via Metav Werkzeuge or consult the technical team.

RUKO step drill 6–37 mm — HSS‑Co5, spiral‑fluted, 12 steps

The RUKO step drill 6–37 mm is a precision step drill designed for progressive hole enlargement with defined step geometry and efficient chip evacuation, suitable for workshop and light industrial use

• HSS‑Co5 solid‑cobalt construction
• Spiral flute for efficient chip removal
• Two cutting edges with cross‑cut tip
• Shaft with three clamping flats

Faster, controlled step drilling for reliable throughput

The spiral‑fluted step drill delivers a consistent drilling sequence across its 6–37 mm range, reducing the need for multiple tools and retooling. The HSS‑Co5 substrate provides enhanced red‑hardness and wear resistance compared with standard high‑speed steel, which translates into longer service intervals and steadier hole quality. The 118° point angle and cross‑cut tip support precise centring and reduced walking at the start of each step, while the two cutting edges maintain symmetrical cutting forces for even material removal. This combination reduces cycle times and supports stable production flow in repetitive drilling operations.

Robust geometry that simplifies set‑up and repeatability

A defined 90° step angle and clearly dressed step edges produce reproducible hole diameters with minimal deburring between steps. The shaft with three clamping flats ensures secure fixation in chucks or collets, preventing slippage and maintaining concentricity during machining. The 12 distinct steps allow incremental hole enlargements without frequent tool changes, enabling efficient processing sequences. These design features together mean fewer interruptions, predictable output, and lower tool handling time for workshops seeking consistent results from each drilling task.

Practical handling and predictable chip control

The spiral flute geometry promotes continuous chip evacuation along the flutes, reducing heat build‑up and clogging in longer drilling cycles. The cross‑cut regrinds at the tip assist chip formation for cleaner edges, which simplifies any subsequent finishing operations. Ergonomic considerations such as the three‑flat shank support quick mounting and alignment in standard toolholders. Supplied as a single unit, the tool package is compact and straightforward to integrate into existing tool sets, helping to streamline inventory while maintaining a broad hole‑making capability.

Contact Metav Werkzeuge for tailored advice or to secure the RUKO step drill 6–37 mm with HSS‑Co5; technical consultants are available at info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: 4000601725NW
• Name: RUKO step drill 6–37 mm HSS‑Co5 spiral‑fluted 2 cutting edges

Facts

• Diameter range: 6–37 mm
• Steps: 12
• Point angle: 118°
• Step angle: 90°
• Number of cutting edges: 2

Special features

• Material: HSS‑Co5
• Flute: spiral‑fluted
• Tip: cross‑cut grind
• Shank: with 3 clamping flats

FAQ

What hole sizes does this step drill cover?
The step drill covers a continuous range from 6–37 mm across 12 defined steps, allowing progressive enlargement without tool changes.

What does HSS‑Co5 indicate for tool performance?
HSS‑Co5 denotes a cobalt‑alloyed high‑speed steel that offers increased red‑hardness and wear resistance compared with standard HSS, improving tool life under higher temperatures.

How do the spiral flutes affect drilling?
Spiral flutes promote efficient chip evacuation along the flute path, reducing clogging and heat‑related wear during extended drilling sequences.

Why is the 118° point angle important?
The 118° point angle with a cross‑cut tip enhances centring and reduces walking at start‑up, helping to produce accurate holes from the first pass.

What is the purpose of the three‑flat shank?
The shank with three clamping flats ensures secure fixation in chucks or collets and improves concentricity during machining.

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