RUKO SPB-DIN338-4,6mm HSSCo kierrepora

The RUKO SPB-DIN338-4.6mm HSSCo twist drill bit is engineered for professionals who demand precision and durability when drilling tough materials. Unlike standard HSS bits, this bit is made from high-speed steel enriched with 5% cobalt, providing superior heat resistance and hardness for demanding applications.

Highlights

• 5% cobalt alloyed HSS for extended tool life
• Split point (cross-ground) tip for accurate centering and reduced walking
• 130° point angle optimized for alloyed and unalloyed steels
• DIN 338 standard dimensions for consistent performance
• Bright finish for clean, efficient chip evacuation

In daily use

This 4.6 mm twist drill bit excels in drilling alloyed and unalloyed steel, stainless steel, cast iron, non-ferrous metals, and plastics. The cylindrical shank with h8 tolerance ensures secure clamping in keyless or keyed chucks. The right-hand cutting direction and type N flute profile deliver smooth, controlled drilling in materials up to 1100 N/mm² tensile strength. The split point design reduces thrust requirements and improves hole quality, making it ideal for both machine and hand-held drilling.

Full specifications

• Drill bit type: Twist drill bit
• Material: HSS-Co (5% cobalt)
• Standard: DIN 338
• Diameter: 4.6 mm
• Total length: 80 mm
• Flute length: 47 mm
• Shank type: Cylindrical
• Point angle: 130°
• Point grind: Split point
• Cutting direction: Right-hand
• Surface finish: Bright
• Tolerance: h8
• Flute type: N (normal helix)
• Manufacturing process: Ground from solid
• Max tensile strength: 1100 N/mm²

Final note

Built to DIN 338 standards, this cobalt twist drill bit delivers reliable performance in demanding workshop environments.