The ULTIMATECUT© countersink. Technically perfect.

More powerful and Faster

  • Up to 30 % time saving
  • Up to 2 times more countersinks
  • Optimal, smooth lowering result

The completely new cutting edge geometry and the RUnaTEC coating make the ULTIMATECUT countersink an all-rounder that achieves the best performance in almost all materials and applications.

Revolutionary chip space geometry and optimised variable relief grinding

Specially developed chip space parameters, such as the rake angle, transition radius and the extra wide flute, ensure optimum chip and heat removal and therefore enable very high wear resistance. The new geometry also counteracts material welding and greatly reduces countersinking forces. The specially developed, variable undercut ensures a very smooth countersinking process. This produces an optimum surface quality and therefore guarantees the best countersinking results. (With the new RUnaTEC coating, the quality of the surface can be improved even further).

The Variant

The ULTIMATECUT countersink with 3 cutting edges is available both uncoated and with RUnaTEC coating.

Both variants are available as single or set items in diameters from 6.3 mm - 31.0 mm.

Click here for the 6-piece set with RUnaTEC

Click here for the 6-piece set HSS

Click here for the 5-pieces set HSS

Click here for the 5-pieces set HSS RUnaTEC

Click here for the single dimension HSS

Click here for the single dimension HSS RUnaTEC

HSS blanc
HSS RUnaTEC coating - 5 pcs.

RUKO nano Technology - up to 16 times longer service life and optimised, smooth countersink surface

RUKO's RUnaTEC coating represents a significant advance in tool technology by offering an unrivalled combination of wear resistance, hardness and performance. This specially developed coating has been designed to significantly increase the life and efficiency of cutting tools, making it a valuable innovation for a wide range of cutting applications.

Extremely high wear resistance

The RUnaTEC coating is characterised by its extremely high wear resistance. This is achieved through the application of advanced coating technologies that form a dense, uniform layer that effectively protects the surface of the tool from wear. This property is particularly advantageous when machining hard or abrasive materials, where conventional uncoated tools would wear out quickly.

Increased heat hardness

Another outstanding advantage of the RUnaTEC coating is its increased hot hardness. Tools with this coating retain their cutting edge integrity even at high machining temperatures, which typically occur during intensive cutting processes. This enables consistently high tool performance over a wide temperature range and reduces the risk of tool failure due to overheating.

No material welding

The RUnaTEC coating effectively prevents material welding, a common challenge when machining sticky or soft materials. By minimising adhesion between the workpiece and tool, the coating improves the surface quality of the machined parts and simplifies chip removal, resulting in a smoother surface.

Optimum, smooth surfaces

By reducing friction between the tool and the workpiece, the RUnaTEC coating enables the creation of optimised, smooth surfaces. This improved surface quality is not only aesthetically pleasing, but can also increase the functionality of components, for example by improving fatigue resistance.

Extremely high nano-hardness

The exceptional nano-hardness of the RUnaTEC coating contributes significantly to the overall performance of the coated tools. This nano-hardness leads to a further increase in wear resistance and enables the tools to deliver precise cuts even under difficult conditions.

The applications

HSS blankHSS RUnaTEC coatedHSSE-Co 5 blankHSSE-Co 5 RUnaTEC coated
Steel (N/mm2) <900⚫️⚫️⚫️⚫️
Steel (N/mm2) <1100 ⚪️⚫️⚫️
Steel (N/mm2) <1300⚪️⚫️
Stainless steel⚪️⚫️⚫️⚫️
Cast iron⚪️⚪️⚪️⚪️
Titanium alloyed⚪️
Main application ⚫️ Side application ⚪️

"The ULTIMATECUT© countersink achieves the best performance in almost all materials and applications. When developing the countersink, we specifically focussed on an equal pitch of the cutting edges. This advantage has also been confirmed by an independent test on the ULTIMATECUT© countersink and countersinks from competitors with unevenly spaced cutting edges, carried out by the Technical University of Darmstadt. The result is less wear and very smooth running, which in turn results in an optimised countersink surface."

David Ondra, Product Manager

Standard countersink

Information as download