RUKO 3.5mm HSS-Co 5 cobalt twist drills, pack of 10 self-centering units.

The Ruko-215035 twist drill is a set of 10 high-precision drill bits made of cobalt alloy high-speed steel (HSS-Co 5). This material provides superior heat resistance and exceptional hardness, making them ideal for drilling difficult-to-machine materials. Their design includes a tapered point grinding with a split point, conforming to DIN 1412 C, which facilitates drilling starts and improves accuracy.

With a cutting angle of 130° and a spiral angle of 20-30°, these drill bits are designed to deliver optimal performance in a variety of industrial applications. The golden-brown surface not only provides an aesthetic finish but also contributes to the product's durability.

• Material: Cobalt alloyed high-speed steel (HSS-Co 5)
• Superior heat resistance and hardness
• Conical point grinding with split point (DIN 1412 C)
• Cutting angle: 130º
• Spiral angle: 20-30º
• Diameter tolerance: h8
• Surface: Golden brown
• Cutting: Right-hand
• Applications: Steel, cast steel, gray cast iron, stainless steels
• Packaging: Translucent plastic case with red background label