4-30mm Step Drill HSS Spiral Flute 2-Flute 118° Point 90° Step Angle - Ruko GmbH

Take advantage of a robust HSS construction combined with spiral chip evacuation and a 3‑flatted shank for reliable clamping; the result is efficient, repeatable step drilling across the 4–30 mm range — order via Metav Werkzeuge or consult their specialists for application guidance.

RUKO Step Drill Bit 4–30 mm – HSS, Spiral Flute, 2‑cut

The RUKO Step Drill Bit 4–30 mm is a multi‑step HSS cutter designed to produce stepped holes across the 4–30 mm range with controlled centring and fast chip removal

• HSS construction for durability
• Spiral flute for efficient chip evacuation
• Cross‑ground point for accurate centring
• 3‑flatted shank for secure clamping

Faster holemaking with controlled step geometry

The RUKO Step Drill Bit delivers progressive hole enlargement across its 4–30 mm range, reducing the need for multiple tools and tool changes. Built from HSS, the cutter retains hardness under heat and maintains cutting integrity during batch work. The 90° step angle and 118° tip angle ensure that each stage engages cleanly, while the two cutting edges balance cutting forces for smoother entry and reduced burr formation. This combination translates into measurable time savings on repetitive tasks and consistent hole dimensions for downstream assembly.

Reliable centring and clean chip removal

A cross‑ground point improves initial positioning and reduces walking on the workpiece, which contributes to more accurate hole placement. The spiral flute geometry actively channels chips away from the cutting zone, reducing clogging and maintaining cutting efficiency over longer runs. These features together mean fewer interruptions for clearing chips and less risk of surface damage, which supports higher first‑pass yields and lower rework rates in production environments.

Secure clamping and run‑out minimisation

The 3‑flatted shank provides positive engagement in standard chucks and collets, reducing slippage and run‑out compared with plain round shanks. Stable clamping preserves the tool geometry during operation, which helps retain hole concentricity and surface finish. The robust HSS body withstands repeated use and is compatible with common workshop tool holders, allowing simple integration into established machining setups and contributing to predictable process capability.

Workshop advantages and supply assurance

Beyond cutting performance, the step design reduces inventory complexity by covering a wide diameter range with a single tool. The combination of HSS material, spiral flute design and precise step geometry supports long service life and consistent results, making it a rational choice for production and maintenance tasks. Metav Werkzeuge’s supply and quality control from Emmerich further support dependable delivery and a clear chain of trust for workshop procurement.

For tailored advice on the RUKO Step Drill Bit and to arrange supply from Metav Werkzeuge’s Emmerich warehouse, contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: 4000601709NW
• UID: 4000601709NW
• Product name: Step drill bit 4–30 mm HSS
• Packaging unit: 1
• Manufacturer: Ruko GmbH

Facts

• Drill range: 4–30 mm
• Steps: 14
• Tip angle: 118°
• Step angle: 90°
• Cutting edges: 2

Special features

• Material: HSS
• Spiral flute (spiralgenutet)
• Cross‑ground point (Kreuzanschliff)
• Two cutting edges
• Shank with 3 flats

FAQ

What diameter range does the tool cover?
The drill covers a progressive range from 4–30 mm, provided in 14 discrete steps for staged hole enlargement.

How many steps are included and what does that mean for workflow?
The bit has 14 steps, allowing a single tool to replace multiple drills and reducing tool changes during production.

What is the material and how does it affect durability?
Made from HSS, the cutter offers good wear resistance and thermal stability for typical workshop drilling tasks.

How does the point geometry improve centring?
The cross‑ground point and 118° tip angle aid accurate positioning and reduce walking on the workpiece, improving hole placement.

What type of shank does it have and why does that matter?
The 3‑flatted shank provides secure clamping and reduced run‑out, which helps maintain concentricity and finish quality when using standard chucks.

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