RUKO SPB-DIN338-HSSCo8-TiAlN-Ø3,9mm kierrepora

Twist drill bit with 3.9 mm diameter, made from HSS-Co 8% with TiAlN coating, ideal for drilling high-alloy steels, stainless steel, and titanium alloys. The TiAlN coating provides high heat resistance up to 800 °C and a hardness of approximately 3000 HV, ensuring long tool life and high performance.

Advantages

Ground from solid for high precision and stability. The TiAlN coating reduces friction and improves chip evacuation, allowing for higher cutting speeds and feed rates. The cobalt alloyed HSS provides excellent hot hardness and wear resistance.

Suitable for

• High-alloy steels
• Stainless steel
• Cast iron
• Acid-resistant steels
• Heat-resistant steels
• Titanium alloys

Key specifications

• Drill Bit Type: Twist Drill Bit (Jobber Length)
• Standard: DIN 338
• Material: HSS-Co 8% (High-Speed Steel with 8% Cobalt)
• Coating: TiAlN (Titanium Aluminum Nitride)
• Diameter: 3.9 mm
• Shank Type: Cylindrical
• Point Angle: 135°
• Overall Length: 75 mm
• Working Length (Flute Length): 43 mm
• Cutting Direction: Right-hand
• Manufacturing Process: Ground from solid
• Tolerance: h8
• Heat Resistance (Coating): Up to 800 °C
• Coating Hardness: Approx. 3000 HV
• Flute Type: Standard Spiral Flute
• Color: Bronze/Grey (TiAlN coated)

Recommendations

For best results, use with suitable cutting fluid and ensure proper chip evacuation. The TiAlN coating allows dry machining in many applications, but coolant can extend tool life further. Always follow safety guidelines for drilling operations.