RUKO ULTIMATECUT Conical Countersink, HSS, Ø 15 mm, DIN 355, 90°.

The RUKO ULTIMATECUT 4S countersink, model Ruko-102878P, is a high-precision tool designed to deliver superior performance when countersinking various materials. With its innovative four-edge design, this countersink significantly reduces axial and radial forces, resulting in smoother and more efficient operation. Thanks to its advanced technology, it allows for countersinking up to 40 mm in diameter, even with hand-held screwdriving and drilling tools.

The ULTIMATECUT 4S not only guarantees a flawless, vibration-free countersinking pattern, but also provides energy and material savings of up to 50%, as well as a tool life that can be up to three times longer compared to conventional countersinks.

The RUnaTEC coating, developed in-house by RUKO, further enhances the tool's performance, especially on demanding materials such as heat-treated steel, offering effective penetration and superior wear resistance.

• Number of cutting edges: 4
• Coating: RUnaTEC
• Hold surface: 3-way spindle
• Cutting direction: right-hand
• Material: HSS
• Standard: DIN 335
• Countersink angle: 90°
• Main application: 900 series steel N/mm², Steel 1100 N/mm², Aluminum, Plastic
• Other applications: Bronze, Cast iron