RUKO SPB-DIN338 17,5 mm valssattu HSS-spiraalipora

Drilling precise holes in tough materials like steel and cast iron requires a drill bit that stays sharp and accurate under pressure. The RUKO SPB-DIN338 17.5 mm twist drill bit is roll-forged from high-speed steel (HSS) and steam-tempered for a durable black oxide finish, giving you a reliable tool for your metalworking tasks.

Who is it for

This drill bit is ideal for machinists, metalworkers, and serious DIYers who need to bore large-diameter holes in steel, cast iron, non-ferrous metals, and plastics. Its 17.5 mm size is suited for heavy-duty drilling where standard bits might struggle.

Main features

• Roll-forged HSS construction for strength and wear resistance
• DIN 338 standard with cylindrical shank for secure chuck grip
• 118° point angle and Type N helix for efficient chip removal
• Steam-tempered black oxide finish reduces friction and corrosion
• Right-hand cutting direction for standard drilling

Specifications

• Diameter: 17.5 mm
• Total length: 191 mm
• Working length: 130 mm
• Material: HSS (High-Speed Steel)
• Manufacturing process: Roll-forged
• Surface finish: Black oxide (steam-tempered)
• Point angle: 118°
• Helix angle: Type N
• Shank type: Cylindrical
• Cutting direction: Right-hand
• Tolerance: h8
• Number of flutes: 2
• Coolant through: No
• Max tensile strength: 800 N/mm²

Tips

Use a suitable cutting fluid when drilling steel to extend bit life. Ensure the workpiece is securely clamped and the drill is set to the correct speed for the material.