8-30mm Step Drill HSS RUnaTEC Coated Spiral Flute 2-Cut FLOWSTEP® Tip 118°/90°, 3-Flank Shank - Ruko GmbH

Combining HSS construction, RUNaTEC coating and the FLOWSTEP® tip delivers fast, precise drilling with noticeably extended tool life. The integrated 3‑flat shank and spiral flute ensure secure clamping and a calm drilling action in hand‑held tools. Order the step drill bit directly via Metav Werkzeuge or ask our consultants if needed.

Step drill bit ULTIMATECUT 8–30 mm — RUKO (HSS, RUnaTEC‑coated, FLOWSTEP®)

The Step drill bit ULTIMATECUT 8–30 mm is a high‑performance HSS step drill for efficient, accurate step drilling in thin workpieces and cylindrical surfaces, optimised for use in handheld power tools.

• HSS with RUnaTEC coating
• FLOWSTEP® tip for smooth transitions
• 3‑flat shank prevents slipping
• High wear resistance and hot hardness

Faster, cleaner drilling through FLOWSTEP® design

The primary benefit of the tool lies in its FLOWSTEP® technology, which provides a soft, seamless transition between successive diameters during the drilling process. This design produces a cleaner hole with reduced burr formation and enables an extremely fast pilot action, lowering the required feed force and conserving motor torque in portable drills. Built from HSS and finished with RUNaTEC coating, the bit combines thermal stability and abrasion resistance to maintain cutting performance over longer production runs. The result is an efficient workflow and a consistent hole quality that supports repeatable processes.

Secure clamping and precise centring for handheld use

A notable practical advantage is the 3‑flat shank, which prevents the bit from rotating in the chuck and improves torque transmission in hand‑held applications. The FLOWSTEP® tip and cross‑ground point geometry permit point‑exact centring without prior centre‑punching, even on round surfaces such as pipes, reducing setup time and simplifying single‑operator tasks. With two cutting edges and a spiral flute, the tool offers a calm, low‑vibration drilling action that protects both the workpiece and the operator’s tool, making it particularly suitable for workshop environments where handheld portability and accuracy matter.

Durability and predictable productivity for production tasks

The combination of HSS material, RUNaTEC coating and spiral fluting achieves a higher thermal endurance and substantially improved wear resistance, which can translate into up to twice the number of holes before tool replacement. This durability reduces downtime and tool‑change frequency, supporting a reliable production rhythm. The stepped geometry with a 90° step angle and a 118° point angle gives consistent chipping and easy chip evacuation. For maintenance‑oriented operations and smaller series manufacturing, the bit offers an attractive balance between longevity and consistent hole quality.

Contact Metav Werkzeuge for tailored advice on the RUKO ULTIMATECUT step drill, available from our Emmerich warehouse; email info@metav-werkzeuge.com or call +49 2822 7131930 for specifications and ordering guidance

Technical data

• Article number: 4000865852NW
• Product label: Stufenbohrer ULTIMATECUT Bohrber.8-30mm HSS RUnaTEC Spiralnut Z.2 Stufen 12 RUKO
• Manufacturer: Ruko GmbH
• Packing unit: 1
• UID: 4000865852NW

Data

• Diameter range: 8–30 mm
• Steps: 12
• Cutting edges: 2
• Point angle: 118°
• Step angle: 90°

Special features

• HSS material
• RUnaTEC coating
• Spiral flute
• Cross‑ground tip
• FLOWSTEP® tip on all steps
• 3‑flat shank
• Right‑hand cutting
• Precise centring without centre‑punching
• Suitable for handheld power tools
• Increased wear resistance and hot hardness
• Up to 2× longer tool life

FAQ

What diameter range does this step drill cover?
The RUKO ULTIMATECUT step drill covers a diameter range of 8–30 mm, allowing multiple hole sizes with a single tool.

Is the bit suitable for use in handheld drills?
Yes — the 3‑flat shank and right‑hand cutting geometry make the ULTIMATECUT well suited to handheld power tools.

How does FLOWSTEP® improve drilling results?
FLOWSTEP® provides a soft, continuous transition between steps, producing smoother holes, reduced burrs and a calmer drilling action with lower feed force.

How many cutting edges does the tool have and what is the point angle?
The tool has 2 cutting edges and a 118° point angle, which support precise centring and reliable chip formation.

Will the RUNaTEC coating extend tool life?
The RUNaTEC coating increases wear resistance and thermal hardness, contributing to extended life and up to twice the number of holes in typical use.

Manufacturer: Ruko GmbH Präzisionswerkzeuge, Robert‑Bosch‑Strasse 7, 71088 Holzgerlingen