Broca curta RUKO DIN 1897 HSS-Co Ø3,1 mm

Stub drill bit made from cobalt-alloyed high-speed steel (HSS-Co) with a 3.1 mm diameter, ground from solid for high precision and durability. Its short, rigid design and 135° split point ensure accurate centering and reduced walking, making it ideal for drilling tough materials.

Advantages

The 5% cobalt content provides high heat resistance and wear resistance, extending tool life even in demanding applications. The bright surface finish reduces friction and improves chip flow, while the h8 tolerance guarantees consistent hole quality.

Suitable for

• Steel up to 1100 N/mm²
• Stainless steel
• Cast iron
• Non-ferrous metals
• Plastics

Key specifications

• Drill bit type: Stub drill bit
• Standard: DIN 1897
• Material: HSS-Co (5% cobalt)
• Diameter: 3.1 mm
• Shank type: Cylindrical
• Point angle: 135°
• Cutting direction: Right-hand
• Overall length: 66 mm
• Flute length: 33 mm
• Tolerance: h8
• Surface finish: Bright

Recommendations

Use with a suitable cutting fluid when drilling stainless steel or high-strength steel to maximize tool life. Ensure the workpiece is securely clamped and the drill is properly aligned to avoid deflection.