150mm Step Drill HSS Spiral Flute 2 Cutting Edges 118° Point 90° Step Angle - Ruko GmbH

Take advantage of the combination of robust HSS construction, spiral chip evacuation and secure clamping for reliable progressive hole-making; order the RUKO step drill directly via Metav Werkzeuge or consult our specialists for selection assistance.

RUKO step drill 6–38 mm, HSS spiral flute, 2 cutting edges

A RUKO step drill 6–38 mm designed for progressive hole sizes, offering a spiral-fluted HSS geometry and a shank with three flats for secure clamping in workshop and production environments

• HSS construction for long tool life
• Spiral flute for smooth chip evacuation
• Cross-ground tip for accurate hole starts
• Shank with 3 flats for secure clamping

Faster production with progressive hole-making

The stepped design enables efficient creation of multiple hole diameters without frequent tool changes, reducing cycle time and tool handling. The HSS body ensures mechanical strength while the spiral flute promotes continuous chip evacuation, which helps maintain cutting stability during progressive drilling. Together, these elements support a steady production rhythm by lowering stoppages and simplifying process planning for general workshop and light industrial tasks.

Precision starts and consistent hole geometry

Accurate starts and repeatable hole quality are achieved through the cross-ground tip and 118° point angle, which centre reliably and reduce walking when entering the workpiece. The defined 90° step angle controls the transition between diameters for predictable hole edges. These engineered cutting geometries translate directly into less rework and improved fit-up for assemblies, making the tool particularly valuable where consistent hole tolerances matter.

Secure clamping and reliable torque transfer

The shank with 3 flats provides positive anti-rotation in chucks and collets, improving torque transmission and reducing slippage under load. Combined with the tool’s 2 cutting edges, this configuration delivers balanced cutting forces and smooth feed behaviour. The result is fewer interrupted cuts, more even wear across the cutting lips and a lower risk of chatter in typical workshop set-ups.

Easy integration and straightforward maintenance

The robust design and simple geometry make the step drill straightforward to integrate into standard machining operations. Routine checks of cutting edges and the flutes for chip build-up maintain performance; re-sharpening is feasible on the cross-ground tip if required to extend service life. For procurement and supply chain efficiency, this tool fits well with consolidated workshop inventories and standard toolholding systems.

For reliable step-drilling performance from RUKO, contact Metav Werkzeuge for personalised advice and prompt supply: info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: 4000601710NW
• Name: RUKO step drill 6–38 mm HSS spiral flute
• Manufacturer: Ruko GmbH
• Packaging unit: 1
• UID: 4000601710NW

Core specifications

• Drilling range: 6–38 mm
• Point angle: 118°
• Step angle: 90°
• Cutting edges: 2
• Shank: 3 flats

Special features

• Material: HSS
• Spiral-fluted design
• Cross-ground tip
• Stepped geometry for progressive hole sizes
• Shank with three clamping flats

FAQ

What hole diameters can be produced with this tool?
The RUKO step drill 6–38 mm creates progressive hole sizes between 6 mm and 38 mm, allowing several diameters from a single tool.

How does the spiral flute affect performance?
The spiral flute on the RUKO step drill improves chip evacuation and reduces clogging, which maintains cutting stability and extends effective tool life.

Is the RUKO step drill suitable for use in standard chucks?
Yes, the shank with three flats is designed for secure clamping in typical chucks and collets, reducing slippage during operation.

What benefit does the 118° point angle provide?
The 118° point angle on this step drill promotes accurate centring and reduces walking at drill entry, improving hole position and surface finish.

Can the cutting edges be maintained or re-sharpened?
The cross-ground tip and defined cutting geometry allow for re-sharpening of the cutting edges to extend service life while keeping performance consistent.

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