RUKO SPB-DIN1897-HSSCo-Ø4,2mm korte boor, HSS-Co 5% cobalt, 135° puntdiameter, 4,2 mm

Stub drill bit with 5% cobalt HSS-Co construction, engineered for high-temperature drilling in tough steels. The 135° split point eliminates walking and reduces thrust, while the bright finish and h8 tolerance ensure precision and long life.

Advantages

High cobalt content provides excellent heat and wear resistance. The self-centering split point allows accurate hole positioning without a center punch. Fully ground from solid for consistent geometry and smooth chip evacuation.

Suitable for

• Alloyed and unalloyed steel
• Stainless steel
• Cast iron
• Non-ferrous metals

Key specifications

• Standard: DIN 1897 (stub drill)
• Diameter: 4.2 mm
• Material: HSS-Co 5% cobalt
• Point angle: 135°
• Point grind: Split point
• Shank: Cylindrical
• Cutting direction: Right-hand
• Tolerance: h8
• Total length: 75 mm
• Flute length: 43 mm

Recommendations

Use with cutting oil for stainless steel. Ideal for CNC machines and hand drills where short, rigid bits are required.