RUKO ULTIMATECUT Conical Countersink, HSS, Ø 16.5 mm, DIN 355, 90°.

The RUKO ULTIMATECUT 4S tapered countersink, model Ruko-102879P, 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 produces a perfect countersinking pattern without vibration marks and optimizes energy and material usage, achieving up to 50% time savings and up to three times longer tool life.

The ULTIMATECUT 4S can countersink diameters up to 40 mm and is compatible with hand-held screwdriving and drilling tools, as well as pillar drills and CNC-controlled machining centers.

The RUnaTEC coating, developed in-house by RUKO, provides effective penetration into demanding materials, such as heat-treated steel, and improves wear resistance.

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