RUKO SPB-DIN338-HSS-TiN Twist Drill Bit Ø9.25 mm

Drilling into tough materials like steel or cast iron often leads to premature wear, wandering drill bits, and poor hole quality. The RUKO SPB-DIN338-HSS-TiN twist drill bit solves these issues with its premium high-speed steel body, titanium nitride coating, and precision-ground geometry.

Who is it for

This drill bit is ideal for professionals and serious DIYers who need reliable, accurate holes in steel, cast iron, non-ferrous metals, plastics, and wood. It suits machine shops, metal fabrication, maintenance tasks, and general workshop use.

Main features

• Diameter: 9.25 mm with h8 tolerance for precise holes
• DIN 338 standard: overall length 125 mm, flute length 81 mm
• High-speed steel (HSS) with titanium nitride (TiN) coating for extended life
• 135° split point for self-centering and reduced walking
• Type N helix angle for efficient chip removal in normal materials
• Ground from solid for consistent quality and sharpness
• Heat resistant up to 600°C, suitable for high-speed drilling

Specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: High-speed steel (HSS)
• Coating: Titanium nitride (TiN)
• Diameter: 9.25 mm
• Shank type: Cylindrical
• Point angle: 135°
• Helix angle: Type N
• Cutting direction: Right-hand
• Overall length: 125 mm
• Flute length: 81 mm
• Tolerance: h8
• Surface finish: Polished flutes
• Colour: Gold

Tips

Use cutting fluid when drilling steel to prolong bit life. Reduce speed for harder materials. Ensure the workpiece is securely clamped. For deep holes, withdraw the bit periodically to clear chips.