RUKO SPB-DIN338-17.0mm-HSSCo Twist Drill Bit

Drilling into tough metals like stainless steel or alloyed steel demands a bit that stays sharp and resists heat. The RUKO SPB-DIN338-17.0mm-HSSCo twist drill bit is built for exactly that, with a cobalt-alloyed high-speed steel body that withstands high temperatures and maintains hardness even under heavy loads.

Who is it for

Professional machinists, metalworkers, and serious DIYers who need reliable, precise holes in challenging materials. It suits anyone working with alloyed or unalloyed steel up to 1100 N/mm² tensile strength, stainless steel, cast iron, and non-ferrous metals.

Main features

• 17.0 mm diameter with DIN 338 standard dimensions
• HSS-Co material with 5% cobalt for high heat resistance
• Split point (cross-ground) tip for accurate self-centering and reduced walking
• 130° point angle optimized for hard materials
• Fully ground from solid for consistent geometry and performance
• Bright surface finish for clean chip evacuation
• Cylindrical shank with h8 tolerance for secure chuck grip
• Right-hand cutting direction

Specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: HSS-Co (high-speed steel with cobalt)
• Cobalt content: 5%
• Diameter: 17.0 mm
• Shank type: Cylindrical
• Shank diameter: 17.0 mm
• Overall length: 184 mm
• Flute length: 125 mm
• Point angle: 130°
• Point grind: Split point (cross-ground)
• Surface finish: Bright
• Tolerance: h8
• Cutting direction: Right-hand cutting
• Manufacturing process: Fully ground from solid
• Application materials: Alloyed and unalloyed steel, stainless steel, cast iron, non-ferrous metals
• Max tensile strength: 1100 N/mm²

Tips

Use cutting fluid or coolant when drilling stainless steel or high-strength alloys to prolong tool life. Ensure the workpiece is securely clamped and the drill is held perpendicular to the surface. For deep holes, withdraw the bit periodically to clear chips and reduce heat buildup.