RUKO SPB-DIN338 4,25mm HSS-Co spiraalboor

The RUKO SPB-DIN338 4.25mm HSS-Co twist drill bit stands out with its 5% cobalt alloy, delivering high heat resistance and durability for demanding drilling tasks. Fully ground with a split point and 135° point angle, it self-centers and reduces walking, ensuring precise starts without a center punch.

Highlights

• 5% cobalt HSS-Co for high heat resistance and extended life
• Split point (cross-ground) with 135° point angle for self-centering
• Fully ground flutes for smooth chip evacuation
• Bright finish for corrosion resistance
• DIN 338 standard for consistent quality

In daily use

Ideal for drilling alloyed and unalloyed steel, stainless steel, cast iron, non-ferrous metals, and plastics. The cylindrical shank fits standard drill chucks, and the right-hand cutting direction suits most drilling machines. With a diameter of 4.25 mm, overall length of 75 mm, and working length of 47 mm, it handles a wide range of workshop and job site applications.

Full specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: HSS-Co (5% cobalt)
• Diameter: 4.25 mm
• Shank type: Cylindrical
• Point angle: 135°
• Point grind: Split point (cross-ground)
• Surface treatment: Bright finish
• Overall length: 75 mm
• Working length: 47 mm
• Manufacturing process: Fully ground
• Cutting direction: Right-hand cutting
• Recommended materials: Steel (alloyed/unalloyed), stainless steel, cast iron, non-ferrous metals, plastics
• Max tensile strength: 1100 N/mm²

Final note

A reliable cobalt drill bit for professionals who need precision and durability in tough materials.