SMART365 HSS-Co Step-Tec Twist Drill Bit Set 4.2 mm 10 pcs

The SMART365 HSS-Co Step-Tec twist drill bit set offers precision and durability for drilling in tough materials. Each bit is made from high-speed steel with 5% cobalt (HSS-Co5), fully ground, with a 135° split point for self-centering and reduced walking. The set includes 10 pieces of 4.2 mm diameter bits, compliant with DIN 338, suitable for steel, stainless steel, cast iron, and non-ferrous metals.

Advantages

High cobalt content enhances heat resistance and tool life. The split point eliminates the need for pilot holes, increasing efficiency. Cylindrical shank fits standard drill chucks.

Suitable for

• Drilling in steel, stainless steel, acid-resistant steel, heat-resistant steel
• Cast iron and non-ferrous metals
• General metalworking applications

Key specifications

• Material: High-Speed Steel with Cobalt (HSS-Co5)
• Drill Bit Diameter: 4.2 mm
• Quantity: 10 pieces
• Point Angle: 135°
• Point Type: Split Point (Self-Centering)
• Shank Type: Cylindrical
• Standard: DIN 338
• Surface Finish: Bright (Uncoated)
• Manufacturing Process: Fully Ground
• Cutting Direction: Right-hand cutting
• Tolerance: h8
• Series/Technology: Step-Tec
• Max Tensile Strength: Approx. 1100 N/mm²

Recommendations

Use medium to low speed with coolant for extended tool life. Suitable for use in drill presses and hand drills.