RUKO SPB-DIN338-27/64-HSSCo HSS-Co Twist Drill Bit 27/64 inch (10.72 mm) DIN 338

For machinists and metalworkers drilling precise holes in tough alloys, the RUKO SPB-DIN338-27/64-HSSCo twist drill bit delivers reliable performance. Its 27/64 inch (10.7156 mm) diameter and 135° split point make it a go-to tool for production environments where accuracy and durability are critical.

Key specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338 (jobber length)
• Material: HSS-Co (high-speed steel with 5% cobalt)
• Diameter: 27/64 inch (10.7156 mm)
• Shank type: Cylindrical, diameter 27/64 inch (10.7156 mm)
• Point angle: 135°
• Point type: Split point (cross-ground)
• Cutting direction: Right-hand cutting
• Surface finish: Bright
• Overall length: 133 mm
• Flute length: 87 mm
• Tolerance: h8
• Manufacturing process: Fully ground
• Suitable materials: Alloyed and unalloyed steel, stainless steel, cast iron, non-ferrous metals, plastics

Why choose it

The 5% cobalt alloy enhances heat resistance, allowing the bit to maintain hardness at elevated temperatures. The split point design reduces walking and provides self-centering for accurate hole placement without a center punch.

Ideal use cases

• Drilling stainless steel and high-strength alloys in fabrication shops
• Precision hole-making in automotive and aerospace components
• General metalworking tasks requiring a durable, long-lasting bit

Good to know

Fully ground from solid HSS-Co stock, this bit offers consistent geometry and sharp cutting edges. The bright finish provides a clean surface and aids in chip evacuation.