RUKO SPB-DIN338 5,5 mm broca helicoidal HSS-Co

Machinists and metalworkers drilling stainless or acid-resistant steel rely on this RUKO SPB-DIN338 5.5 mm twist drill bit. Its HSS-Co cobalt alloy and 135° split point deliver precise, self-centering starts in tough materials.

Key specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: HSS-Co (5% cobalt)
• Diameter: 5.5 mm
• Total length: 93 mm
• Working length: 57 mm
• Shank type: Cylindrical
• Shank diameter: 5.5 mm
• Point angle: 135°
• Point grind: Split point
• Surface finish: Bright
• Manufacturing process: Fully ground
• Tolerance: h8
• Cutting direction: Right-hand

Why choose it

The cobalt alloy withstands high heat, making this bit suitable for stainless steel, cast iron, bronze, and hard plastics. The split point prevents walking, so holes start exactly where you aim.

Ideal use cases

• Drilling stainless and acid-resistant steel
• Working with heat-resistant and high-alloy steels
• Precision drilling in cast iron and bronze
• Creating clean holes in hard plastics

Good to know

Manufactured to DIN 338 with h8 tolerance for consistent diameter. The bright finish reduces friction and chip adhesion.