48mm Step Drill HSS Spiral Flute 4–12mm 2-Cut 118° Point 90° Step Angle Short Shank - Ruko GmbH

Combining HSS construction with a spiral-fluted geometry ensures clean hole progression and efficient chip evacuation; the short overall length and a shaft with three flats provide secure clamping for electrical cabinet work up to 2.0 mm. Order the RUKO step drill directly via Metav Werkzeuge or ask our consultants if needed.

RUKO Step Drill Bit 4–12 mm (HSS, spiral-fluted, short 48 mm)

A RUKO Step Drill Bit 4–12 mm engineered for precise hole enlargement in thin sheet metal and confined electrical-cabinet spaces

• HSS, spiral-fluted with split point
• Steps 4–12 mm for precise progressions
• Short 48 mm length for confined spaces
• Shaft with 3 flats for secure clamping

Faster hole progression with consistent results

The combination of HSS material and a spiral-fluted design delivers improved cutting action and reliable chip evacuation, which reduces heat build-up and extends service intervals. The stepped geometry covering 4–12 mm enables staged enlargement of holes without tool changes, while the two cutting edges provide balanced cutting forces and a smooth feed. For workshops prioritising throughput, this configuration reduces cycle times and minimises rework by producing consistently shaped bores.

Secure clamping and ideal use for cabinet assembly

A short overall length of 48 mm and a shaft with three flats ensures positive clamping in standard chucks and holders, making the bit especially suitable for control cabinet and panel assembly where space is limited. The compact design keeps the tool supported close to the chuck, which reduces vibration and improves surface finish when working in thin material. Applications up to 2.0 mm sheet thickness are covered, matching the common requirements of electrical enclosure fabrication.

Precisely ground geometry for clean edges

The point geometry is split-point ground in accordance with DIN 1412‑C, combined with CBN-ground flank surfaces for a sharp, wear-resistant cutting face. A 118° point angle and a 90° step angle help to centre the tool and form defined step transitions, lowering the risk of burr formation. These features translate into clean hole edges and reduced need for secondary deburring, which benefits both manual assembly and automated production environments.

Practical tool guidance and maintenance notes

The solid high-speed-steel body is designed for straightforward use and long service life under typical workshop conditions. The short version benefits setups where tool overhang must be minimised; however, correct clamping and recommended speeds should be observed to avoid premature wear. For matching spindle speed and feed to specific materials or to discuss consumable options, Metav Werkzeuge can provide technical advice and practical recommendations tailored to workshop processes.

For precise panel drilling and expert application guidance, contact Metav Werkzeuge in Emmerich at info@metav-werkzeuge.com or +49 2822 7131930 to review the RUKO step drill (SKU 4000601752NW) and confirm suitability for specific sheet thicknesses

Technical data

• Article number: 4000601752NW
• Label: Stufenbohrer Bohrber.4-12mm HSS Spiralnut Gesamt-L.48mm Z.2 Stufen 9 RUKO
• Manufacturer: Ruko GmbH
• Packaging unit: 1

Facts

• Steps: 4–12 mm
• Overall length: 48 mm
• Steps count: 9
• Cutting edges: 2
• Point angle: 118°
• Step angle: 90°
• Shaft: 3 flats
• Suitable sheet thickness: up to 2.0 mm

Special features

• Material: HSS
• Flute: spiral-fluted
• Point: split point per DIN 1412‑C
• Grinding: CBN-ground
• Short version
• Ideal for control cabinet construction

FAQ

What hole sizes does the step drill cover?
The RUKO step drill bit covers hole sizes from 4–12 mm, with defined steps that allow progressive enlargement without tool changes.

Is the bit suitable for electrical cabinet work?
Yes, the short overall length (48 mm) and the shaft with three flats make this bit particularly suitable for control cabinet assembly and panel work up to 2.0 mm sheet thickness.

How does the split point affect performance?
The split point (ground to DIN 1412‑C) improves centring and reduces walking on the material surface, which results in cleaner starts and less need for pilot holes.

What are the key maintenance recommendations?
Maintain secure chuck clamping, use appropriate spindle speeds for the material, and monitor wear on the CBN-ground cutting faces; these steps prolong service life and preserve hole quality.

Which SKU should be referenced when ordering or requesting support?
Reference SKU 4000601752NW when ordering or requesting technical advice to ensure the correct RUKO step drill configuration is supplied.

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