RUKO LOS-HSSCo-111mm HSS-Co Twist Drill Bit 11.1 mm DIN 338

Drilling into tough metals like stainless steel or alloyed steel quickly dulls ordinary bits, causing heat build-up and poor hole quality. This RUKO twist drill bit solves that with a cobalt-alloyed HSS-Co construction that retains hardness at high temperatures, paired with a 135° split point for accurate starts and reduced walking.

Who is it for

Professional machinists, metal fabricators, and serious DIYers who need a durable, precision-ground bit for demanding metalworking tasks.

Main features

• HSS-Co (5% cobalt) for high heat resistance and extended life
• Fully ground flutes and reinforced core for stability and excellent chip removal
• 135° point angle for precise centering and less thrust pressure
• Bright uncoated finish for clean cutting in a wide range of metals
• DIN 338 standard with h8 shank tolerance for accurate chuck fit

Specifications

• Material: HSS-Co (High-Speed Steel Cobalt)
• Diameter: 11.1 mm
• Overall length: 142 mm
• Working length (flute length): 101 mm
• Point angle: 135°
• Shank type: Cylindrical (straight)
• Cutting direction: Right-hand
• Flute type: Standard spiral
• Surface finish: Bright (uncoated)
• Tolerance: h8
• Suitable materials: Metal, stainless steel, cast iron, alloyed and non-alloyed steel

Tips

Use cutting fluid when drilling stainless or alloyed steels to maximize bit life. For deep holes, peck drill to clear chips and prevent overheating.