RUKO KEB-HSS-TiAlN Twist Drill Bit 21.0 mm DIN 338

Drilling large-diameter holes in tough metals like steel and stainless steel demands a drill bit that stays sharp, resists heat, and cuts accurately. The RUKO KEB-HSS-TiAlN twist drill bit with 21.0 mm diameter is engineered for industrial metalworking, combining high-speed steel with a titanium aluminum nitride coating to deliver reliable performance in demanding applications.

Who is it for

This drill bit is intended for professional metalworkers, machinists, and industrial users who need a robust tool for drilling steel, stainless steel, cast iron, non-ferrous metals, and plastics. It suits workshops, manufacturing, and maintenance environments where precision and tool life matter.

Main features

• 21.0 mm diameter with reduced cylindrical shank (13.0 mm) for secure chucking.
• High-speed steel (HSS) body with TiAlN coating for heat resistance and extended life.
• 135° split point for accurate starting and reduced walking.
• Right-hand cutting, DIN 338 standard, 205 mm overall length, 135 mm flute length.
• Recommended for use with coolant to optimize performance.

Specifications

• Drill bit type: Twist drill bit
• Material: High-speed steel (HSS)
• Coating: Titanium aluminum nitride (TiAlN)
• Diameter: 21.0 mm
• Shank type: Reduced cylindrical shank
• Shank diameter: 13.0 mm
• Overall length: 205 mm
• Working length (flute length): 135 mm
• Point angle: 135°
• Point type: Split point
• Standard: DIN 338
• Cutting direction: Right-hand cut
• Suitable materials: Steel, stainless steel, cast iron, non-ferrous metals, plastics
• Recommended application: Industrial, professional metalworking
• Coolant use: Recommended
• Packaging quantity: 1 piece
• Product series: KEB

Tips

Use a suitable cutting fluid or coolant to reduce heat and prolong tool life. Ensure the drill is securely clamped and the workpiece is stable. For best results, pre-drill a pilot hole when working with very hard materials.