RUKO 1000026480 HSS-Co DIN 338 Twist Drill Bit 4.75 mm

For machinists and metalworkers drilling stainless steel, acid-resistant steel, or heat-resistant steel, the RUKO 1000026480 twist drill bit delivers reliable performance. With a 4.75 mm diameter and DIN 338 standard, it fits standard drill chucks and handles tough materials thanks to its HSS-Co construction with 5% cobalt.

Key specifications

• Drill bit type: Twist drill bit
• Diameter: 4.75 mm
• Overall length: 80 mm
• Working length (flute length): 47 mm
• Material: HSS-Co (High-Speed Steel with 5% Cobalt)
• Shank type: Cylindrical
• Point angle: 130°
• Point grind: Split point (cross-ground)
• Cutting direction: Right-hand cutting
• Surface finish: Bright
• Tolerance: h8
• Standard: DIN 338
• Manufacturer series: Ruko 204 Series

Why choose it

The cobalt alloyed HSS provides high heat resistance and wear resistance, extending tool life in demanding applications. The split point design reduces walking and improves centering accuracy, while the bright finish ensures smooth chip evacuation.

Ideal use cases

• Drilling stainless steel and acid-resistant steel
• Working with heat-resistant steel and alloyed/unalloyed steel
• Machining cast iron, non-ferrous metals, and plastics
• General purpose drilling in tough and hard materials

Good to know

Manufactured to DIN 338 specifications, this drill bit meets standard dimensional requirements for twist drills with cylindrical shanks. The h8 tolerance ensures consistent diameter for precise holes.