RUKO HSS-G špirálový vrták 7,8 mm DIN 338 krížový brús

Twist drill bit made from high-speed steel (HSS-G), ground from solid with a cross-ground split point for precise centering and reduced feed force. The 135° point angle and h8 shank tolerance ensure accurate drilling in steel, cast iron, non-ferrous metals, and plastics.

Advantages

Ground from solid HSS-G for high durability and long tool life. The split point design prevents walking and provides excellent centering, even on curved surfaces. Bright finish reduces chip adhesion and improves chip evacuation.

Suitable for

• Steel
• Cast iron
• Non-ferrous metals
• Plastics

Key specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: High-Speed Steel (HSS-G)
• Manufacturing process: Ground from solid
• Drill diameter: 7.8 mm
• Total length: 117 mm
• Working length (flute length): 75 mm
• Shank type: Cylindrical
• Shank diameter: 7.8 mm
• Point angle: 135°
• Point type: Split point (cross-ground)
• Surface finish: Bright / uncoated
• Tolerance: h8
• Direction of cut: Right-hand cut

Recommendations

Use with appropriate cutting fluid for steel and cast iron to extend tool life. For best results, pre-drill with a smaller diameter bit when drilling large holes in hard materials.