RUKO BSB-HSS-Gr.7-5-25,4 mm broca helicoidal HSS-G DIN 338

Drilling large-diameter holes in tough materials demands a bit that stays sharp and accurate. The RUKO BSB-HSS-Gr.7-5-25.4mm twist drill bit is ground from solid HSS-G steel to DIN 338, delivering reliable performance in steel, cast iron, non-ferrous metals, and plastics.

Who is it for

Machinists, metalworkers, and serious DIYers who need a precise 25.4 mm hole in materials up to 900 N/mm² tensile strength. Suitable for hand drills, pillar drills, and drilling machines.

Main features

• HSS-G ground twist drill bit for high accuracy and durability
• 25.4 mm diameter with cylindrical shank, DIN 338 standard
• 118° point angle, right-hand cutting, h8 tolerance
• Bright ground finish for clean cutting and chip evacuation

Specifications

• Drill bit type: Twist drill bit
• Material: HSS-G (High-Speed Steel, Ground)
• Standard: DIN 338
• Diameter: 25.4 mm
• Shank type: Cylindrical shank
• Shank diameter: 25.4 mm
• Total length: 267 mm
• Working length (flute length): 165 mm
• Point angle: 118°
• Surface finish: Bright / Ground
• Tolerance: h8
• Cutting direction: Right-hand cutting
• Manufacturing process: Ground from solid material
• Recommended materials: Steel, cast steel, grey cast iron, malleable cast iron, non-ferrous metals, plastics
• Max material hardness: Up to 900 N/mm²
• Packaging unit: 1 piece
• Colour: Metallic Silver

Tips

Use cutting fluid when drilling steel to extend bit life and improve hole quality. For deep holes, withdraw the bit periodically to clear chips.