RUKO SPB-DIN338-HSSCo8-Ø2.9mm Twist Drill Bit, HSS-Co 8%, 2.9 mm, DIN 338

Machinists and metalworkers rely on this RUKO twist drill bit for precise holes in tough materials. With a 2.9 mm diameter and DIN 338 geometry, it is a dependable choice for workshop and industrial use.

Key specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: HSS-Co 8% (high-speed steel with 8% cobalt)
• Diameter: 2.9 mm
• Shank type: Cylindrical (straight shank)
• Point angle: 135°
• Point grind: Split point (cross-ground)
• Flute type: Right-hand spiral
• Surface finish: Bright
• Overall length (l1): 61 mm
• Working length (l2): 33 mm
• Diameter tolerance: h8
• Manufacturing process: Fully ground
• Application materials: High-alloy steels, stainless steel, acid-resistant steels, heat-resistant steels, cast iron, bronze
• Cutting direction: Right-hand
• Cobalt content: 8%
• Heat resistance: Very high
• Wear resistance: Very high

Why choose it

The 8% cobalt alloy withstands high temperatures and maintains hardness, making this bit suitable for demanding drilling tasks. The split point reduces walking and improves centering, while the bright finish provides a clean surface.

Ideal use cases

• Drilling stainless and acid-resistant steels
• Working with high-alloy steels and cast iron
• Precision drilling in maintenance and production

Good to know

Fully ground from HSS-Co 8%, this bit meets DIN 338 dimensional standards. The 135° point angle is optimized for metal cutting, and the h8 tolerance ensures consistent hole sizing.