RUKO DIN 338 HSS-Co σπειροειδές τρυπάνι 7,25 mm

The RUKO SPB-DIN338-7,25mm-HSSCo is a fully ground twist drill bit engineered for high-performance drilling in demanding materials. Its cobalt-alloyed high-speed steel (HSS-Co) construction provides superior heat resistance and wear resistance compared to standard HSS bits, making it the right choice for stainless steel, high-alloy steels, and other tough metals.

Highlights

• 7.25 mm diameter with h8 tolerance for precise hole sizing
• 130° split point for accurate self-centering and reduced walking
• DIN 338 jobber length: 109 mm overall, 69 mm flute length
• Right-hand cutting, cylindrical shank, bright finish

In daily use

This bit excels in machine and hand drilling applications where accuracy and durability are critical. The split point geometry minimizes thrust pressure and prevents wandering on curved or smooth surfaces, while the cobalt content maintains hardness at elevated temperatures, extending tool life in abrasive materials.

Full specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: HSS-Co
• Diameter: 7.25 mm
• Shank type: Cylindrical
• Point angle: 130°
• Point type: Split point (cross-ground)
• Flute type: Standard spiral flute
• Surface finish: Bright
• Tolerance: h8
• Overall length: 109 mm
• Working length: 69 mm
• Direction of cut: Right-hand cutting
• Manufacturing process: Fully ground
• Recommended applications: High-alloy steels, stainless steel, acid and heat-resistant steels, cast iron, bronze

Final note

A professional-grade drill bit for precision metalworking, built to handle tough alloys without compromise.