6-37mm Step Drill HSS Spiral Fluted 2-Cut 118° Point 90° Step Angle - Ruko GmbH

Take advantage of a hardened HSS construction combined with spiral fluting and a cross-ground 118° tip for fast, clean step drilling and reliable centring; order directly via Metav Werkzeuge or consult our specialists for application advice.

RUKO Step Drill Bit 6–37 mm — HSS spiral-fluted, 2-cut, 12-step

A RUKO step drill bit 6–37 mm for progressive hole diameters, engineered for efficient step drilling and secure clamping in workshop and production settings

• HSS construction for long tool life
• Spiral fluting for fast chip evacuation
• Cross-ground 118° tip for accurate centring
• Shank with 3 clamping flats for secure grip

Faster, more predictable step drilling for reduced cycle times

The HSS material and two cutting edges deliver a balance of toughness and sharpness that is particularly beneficial where repeatable results matter. The spiral flute promotes efficient chip evacuation, which reduces clogging and heat build-up; this results in smoother cutting and a lower risk of material deformation. The combination of a cross-ground tip and a defined 90° step angle enables accurate step transitions so that hole diameters are formed consistently, lowering the need for secondary operations and saving time on the production line.

Secure setup and reliable clamping for consistent results

A shank with three clamping flats provides a positive mechanical interface with chucks and holders, reducing slippage under higher torque. This design, together with the spiral-grooved geometry, supports stable running and predictable force distribution during drilling. The tool’s geometry is optimised to begin cutting cleanly without excessive walking, so setup effort is reduced and first-off quality improves—an advantage in small-batch and repetitive manufacturing processes alike.

Durable geometry and clear benefits for workshop use

With 12 distinct steps covering a diameter range from 6–37 mm, the stepped design minimises tool changes for incremental hole enlargement tasks. The 118° point angle ensures reliable centring and smooth engagement, while the spiral groove and two-cut layout preserve edge life under normal working conditions. This combination was conceived to support both hand-held and machine-mounted operations, delivering repeatable hole profiles and fewer rejects over extended use — a pragmatic choice for workshops seeking precision without constant retooling.

Contact Metav Werkzeuge to discuss the RUKO step drill bit and secure tailored purchasing and technical advice at info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical Data

• Article number: 4000601716NW
• Name: Step drill bit 6–37 mm HSS spiral-fluted 2 cuts 12 steps RUKO
• Manufacturer: Ruko GmbH Präzisionswerkzeuge
• Packaging unit: 1

Core specifications

• Diameter range: 6–37 mm
• Number of steps: 12
• Tip angle: 118°
• Step angle: 90°
• Cutting edges: 2
• Flute: spiral-fluted
• Shank: 3 clamping flats
• Material: HSS

Features

• Cross-ground tip for precise starts
• Spiral groove for chip evacuation
• Shank with three flats for secure clamping
• Two cutting edges for efficient cutting action

FAQ

What diameter range is covered by this step drill bit?
The RUKO step drill bit covers diameters from 6 to 37 mm, allowing progressive enlargement without frequent tool changes.

How many steps does the tool include?
The tool features 12 steps, enabling multiple hole sizes to be produced with a single tool.

What is the point and step geometry?
The design includes a 118° point angle and a 90° step angle; these dimensions on the RUKO stepped drill promote accurate centring and defined step formation.

What shank type is used for clamping?
A shank with three clamping flats is provided to improve grip in chucks and reduce the risk of slippage during operation with the RUKO step drill bit.

Which material is the tool made from and what does that mean for durability?
Constructed from HSS, the RUKO step drill bit combines hardness with toughness, offering sustained cutting performance and resistance to wear under common workshop conditions.

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