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

Efficient stepped drilling from 6–40 mm with HSS construction and a spiral flute reduces tool changes and keeps production moving; order the RUKO step drill directly via Metav Werkzeuge or consult our specialists for tailored advice.

RUKO Step Drill 6–40 mm (HSS, spiral flute) – versatile single-tool solution with split point and 3-flat shank

RUKO Step Drill 6–40 mm is a high-precision HSS step drill intended for metalworking and general workshop tasks, combining a wide drilling range with spiral flute geometry for consistent chip evacuation

• HSS with spiral flute for fast chip evacuation
• Split-point 118° tip for accurate centring
• 6–40 mm range reduces tool changes
• Shank with three flats for secure clamping

Reduce set-up time with one tool for stepped holes

The broad 6–40 mm drilling range makes this a practical single-tool option for workshops that require stepped holes in a sequence of diameters. By covering multiple diameters in one pass, the bit minimises tool changes and saves cycle time while maintaining repeatable results. The HSS material ensures a balance of toughness and wear resistance for routine metalworking operations, and the spiral flute design assists continuous chip removal to keep the hole quality stable over longer runs.

Accurate centring and clean hole edges thanks to focused geometry

The split-point 118° tip and the two cutting edges provide reliable self-centring and reduce walking at the start of the cut, which improves concentricity and finish. The 90° step angle defines each diameter precisely, so the stepped profile is produced with consistent shoulder definition and minimal burr formation, translating into less rework and faster downstream assembly. The combination of 2 cutting edges and a cross-ground tip supports effective cutting action across the stepped range.

Secure clamping and reliable chip control for everyday workshop use

A shank with three flats offers positive grip in standard chucks and holders, reducing slippage and run-out for more accurate hole geometry. The spiral flute promotes efficient chip evacuation, lowering the risk of clogging when enlarging holes across multiple steps. Together, these features deliver dependable performance in repetitive tasks and contribute to a steadier production flow, making the tool a practical choice for maintenance and light-series manufacturing.

For high-efficiency stepped drilling, order the RUKO Step Drill 6–40 mm (SKU 4000601720NW) through Metav Werkzeuge; specialist advice and ordering are available via info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: 4000601720NW
• Manufacturer: Ruko GmbH
• Packaging unit: 1

Facts

• Drilling range: 6–40 mm
• Point angle: 118°
• Step angle: 90°
• Cutting edges: 2
• Shank: 3 flats
• Steps: 16

Special features

• HSS material
• Spiral flute (spiralgenutet)
• Split-point / cross-ground tip (Kreuzanschliff)
• 2 cutting edges
• 90° step geometry

FAQ

What is the drilling range of this step drill?
The RUKO Step Drill 6–40 mm covers diameters from 6 mm to 40 mm, allowing multiple stepped holes with a single tool.

How many cutting edges does the bit have and what is the tip geometry?
The tool features 2 cutting edges and a split-point 118° tip for improved centring and reduced walking.

How does the spiral flute affect performance?
The spiral flute supports efficient chip evacuation during stepped drilling, helping to maintain consistent hole quality and reduce clogging.

What clamping is recommended for stable operation?
The shank includes three flats, providing a secure grip in standard chucks or collet systems to minimise slippage and run-out.

How many steps are formed by this tool?
This step drill creates 16 steps across its 6–40 mm range, each defined by the 90° step geometry.

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