5.3-30.5mm Step Drill HSS Spiral Flute 2 Cutting Edges 118° Point 90° Step Angle - Ruko GmbH

Take advantage of a high-performance combination of HSS construction, spiral fluting and a 118° split point for rapid, clean hole enlargement across a wide diameter range; order directly via Metav Werkzeuge or consult the team for application advice.

RUKO step drill bit 5.3–30.5 mm, HSS, spiral-fluted, 9-step

RUKO step drill bit 5.3–30.5 mm for controlled enlargement of holes in sheet materials and for use with metric cable glands, offering a compact, multi-diameter solution for workshop production

• HSS spiral-fluted geometry for fast chip evacuation
• Split-point 118° for precise centring and reduced walking
• 9-step profile from 5.3 to 30.5 mm for versatile hole sizes
• Shank with three flats for secure clamping in chucks

Faster hole making with fewer tool changes

The 9-step profile enables a continuous increase from 5.3 to 30.5 mm, which minimises tool changes and reduces set-up time on production runs. Thanks to the spiral-fluted design, chips are evacuated more effectively, lowering heat build-up and extending tool life. This staged approach is particularly valuable for repetitive tasks in fabrication and electrical installations where multiple hole sizes are required in sequence.

Accurate starts and consistent finishes for less rework

A 118° split point (cross-ground tip) provides reliable centring on a variety of materials without the need for pilot holes, decreasing the risk of wandering at the start of the cut. The combination of two cutting edges and a well-defined step angle of 90° produces consistent hole edges that demand less deburring, which in turn shortens downstream finishing and inspection steps for higher throughput.

Workshop-ready design for secure clamping and handling

The shank with three flats gives positive retention in chucks and quick-change holders, ensuring concentricity and repeatability during machining. Constructed from HSS, the tool balances toughness and cutting performance, making it suitable for common workshop substrates and for applications involving metric cable glands. The robust design supports reliable results in both manual and machine-assisted drilling setups.

Choose the RUKO step drill for dependable, versatile holemaking and contact Metav Werkzeuge in Emmerich for tailored advice or to arrange prompt supply — info@metav-werkzeuge.com | +49 2822 7131930

Technical data

• Article number: 4000601758NW
• SKU: 4000601758NW
• Description: HSS spiral-fluted step drill, split-point, 9 steps, shank with 3 flats

Facts

• Diameter range: 5.3–30.5 mm
• Steps: 9
• Cutting edges: 2
• Point angle: 118°
• Step angle: 90°
• Packaging unit: 1

Special features

• Material: HSS
• Spiral flute for improved chip evacuation
• Cross-ground (split) point for precise centring
• Shank with three flats for secure clamping
• Suitable for metric cable glands

FAQ

What diameter range does the bit cover?
The bit covers a diameter range of 5.3–30.5 mm, provided by the 9-step profile included with the RUKO step drill (SKU 4000601758NW).

Is the tool suitable for starting holes without a pilot?
Yes, the 118° split point on this RUKO step drill reduces walking and allows reliable starts on most sheet materials without a separate pilot.

Which materials can be machined with this drill?
The tool is made from HSS and, with its spiral flutes, is intended for common workshop materials and applications such as holes for metric cable glands.

How is the tool secured in the chuck?
The shank features three flats, giving positive locking and stable clamping for accurate, repeatable drilling.

Does the design reduce finishing work after drilling?
The combination of two cutting edges and defined step geometry helps produce cleaner holes, which typically reduces the need for extensive deburring.

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