RUKO SPB-DIN338-HSS-TiN Twist Drill Bit 5/16 inch (7.94 mm)

This RUKO twist drill bit stands out with its titanium nitride (TiN) coating, which increases surface hardness and reduces friction, resulting in longer tool life and smoother drilling compared to uncoated HSS bits. The 135° point angle provides self-centering for precise hole placement without a center punch.

Highlights

• TiN coating: high wear resistance and heat resistance for demanding applications
• 135° point angle: self-centering, reduces walking and improves accuracy
• Ground from solid: precise geometry and consistent performance
• DIN 338: standard dimensions for reliable use in drill chucks and machines

In daily use

Ideal for general purpose drilling in steel, cast iron, non-ferrous metals, plastics, and other materials up to 900 N/mm² tensile strength. The cylindrical shank fits standard three-jaw chucks, and the right-hand cutting direction suits most drilling machines and hand drills.

Full specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: High-speed steel (HSS)
• Coating: Titanium nitride (TiN)
• Diameter: 5/16 inch (7.94 mm)
• Overall length: 117 mm
• Working length: 75 mm
• Shank type: Cylindrical
• Shank diameter: 5/16 inch (7.94 mm)
• Point angle: 135°
• Cutting direction: Right-hand
• Tolerance: h8
• Manufacturing process: Ground from solid
• Flute type: Standard spiral flute
• Self-centering: Yes
• Heat resistance: High
• Wear resistance: Excellent

Final note

For professionals and demanding DIY users, this RUKO drill bit delivers consistent performance and durability in a wide range of materials.