RUKO SPB-DIN338 18.5mm Roll-Forged HSS Twist Drill Bit

For machinists and metalworkers who need a reliable large-diameter drill bit for general purpose drilling, the RUKO SPB-DIN338 18.5mm roll-forged twist drill bit delivers consistent performance in steel, cast iron, non-ferrous metals, plastics, and wood. Its black oxide finish and 118° point angle make it a practical choice for handheld and pillar drills.

Key specifications

• Drill bit type: Twist drill bit
• Material: HSS-R (High-Speed Steel, Rolled)
• Standard: DIN 338
• Drilling diameter: 18.5 mm
• Total length: 198 mm
• Working length (flute length): 130 mm
• Shank type: Cylindrical (straight shank)
• Manufacturing process: Roll-forged
• Point angle: 118°
• Flute type: Right-hand cutting
• Surface finish: Black oxide
• Tolerance: h8
• Material hardness suitability: Up to approx. 900 N/mm²

Why choose it

Roll-forged HSS construction provides a good balance of toughness and wear resistance, while the black oxide finish helps reduce friction and improve chip flow. The DIN 338 standard ensures compatibility with standard drill chucks.

Ideal use cases

• Drilling large holes in steel and cast iron
• General maintenance and repair work
• Fabrication and metalworking shops
• Drilling non-ferrous metals and plastics

Good to know

Coolant is recommended for optimal performance and tool life. Suitable for handheld drills and pillar drills.