RUKO HSS Self-Centering Twist Drills Ø 12.1 mm - Pack of 5

The Ruko-214121 twist drill bit set is a 5-piece set of high-precision drill bits designed to deliver exceptional performance in a wide variety of materials. Manufactured to DIN 338 standards, these milled and ground drill bits feature a self-centering design that ensures high concentricity and rotational accuracy, making them an indispensable tool for professionals and DIY enthusiasts.

The drill bit geometry includes a ground conical point with a split point according to DIN 1412 C, which facilitates penetration into the material and reduces slippage. With a cutting angle of 118 degrees and a spiral angle of 20-30 degrees, these drill bits are optimized for efficient and clean cutting.

• Diameter: Ø 12.1 mm
• Tolerance: h8
• Right-hand cut
• Applications: Steel, alloy and non-alloy cast steel (up to 900 N/mm²)
• Compatible with gray, malleable, and nodular cast iron
• Use on sintered iron, nickel silver, and graphite cast iron
• Ideal for aluminum alloys, bronze, and brass
• High concentricity and rotational accuracy
• Bright surface for reduced friction
• Self-centering design for ease of use