RUKO SPB-DIN338 7.2mm HSS-Co Twist Drill Bit

Drilling into tough metals like stainless steel or alloyed steel quickly dulls standard drill bits, causing wandering, overheating, and poor hole quality. The RUKO SPB-DIN338 7.2mm HSS-Co twist drill bit solves this with a cobalt-alloyed high-speed steel construction and a self-centering split point for precise, efficient drilling even in hard materials.

Who is it for

Metalworkers, machinists, and serious DIYers who need a reliable bit for alloyed and unalloyed steel, stainless steel, cast iron, non-ferrous metals, and plastics. It is ideal for general purpose drilling where accuracy and durability are essential.

Main features

• HSS-Co (5% cobalt) for high heat resistance and wear resistance
• DIN 338 standard dimensions: 7.2 mm diameter, 109 mm total length, 69 mm flute length
• 135° split point for self-centering and reduced walking
• Fully ground with bright finish for smooth chip evacuation
• Right-hand cutting, cylindrical shank, h8 tolerance
• Compatible with materials up to 1100 N/mm² tensile strength

Specifications

• Diameter: 7.2 mm
• Total length: 109 mm
• Flute length: 69 mm
• Shank type: Cylindrical
• Shank diameter: 7.2 mm
• Point angle: 135°
• Point type: Split point
• Material: HSS-Co (5% cobalt)
• Standard: DIN 338
• Surface finish: Bright
• Manufacturing process: Fully ground
• Tolerance: h8
• Flute type: Right-hand cutting
• Packaging quantity: 1 piece

Tips

Use a cutting fluid when drilling stainless steel or other tough alloys to extend tool life. Ensure the workpiece is securely clamped and use a center punch for maximum precision.