RUKO SPB-DIN338-3/16-HSSCo Twist Drill Bit 4.76 mm

Drilling into stainless steel or high-alloy steel quickly blunts ordinary HSS bits. The RUKO SPB-DIN338-3/16-HSSCo twist drill bit solves that problem with a 5% cobalt alloy that stays sharp at high temperatures and a 135° split point that prevents walking and reduces thrust.

Who is it for

Metalworkers, maintenance technicians, and serious DIYers who regularly drill stainless steel, cast iron, or tough alloys up to 1100 N/mm² tensile strength.

Main features

• HSS-Co steel with 5% cobalt for high heat resistance and longer life in hard materials.
• 135° split point for self-centering and reduced feed pressure.
• Ground from solid with h8 tolerance for precise holes.
• DIN 338 standard dimensions: 80 mm overall length, 52 mm flute length.
• Bright finish for clean chip evacuation.

Specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: HSS-Co (5% cobalt)
• Diameter: 3/16 inch (4.76 mm)
• Shank type: Cylindrical
• Point angle: 135°
• Point type: Split point
• Cutting direction: Right-hand
• Surface finish: Bright
• Manufacturing process: Ground from solid
• Tolerance: h8
• Overall length: 80 mm
• Flute length: 52 mm
• Recommended materials: Stainless steel, high-alloy steels, cast iron, non-ferrous metals, plastics
• Material hardness compatibility: Up to 1100 N/mm² tensile strength

Tips

Use cutting fluid when drilling stainless steel to extend bit life. For deep holes, withdraw the bit periodically to clear chips.