RUKO EGB-HSS-55°-1/16x Twist Drill Bit, 1/16 inch (1.59 mm), HSS-E Co 5%, DIN 338, 135° Point

Precision drilling in tough materials demands a bit that stays sharp and centered. The RUKO EGB-HSS-55°-1/16x twist drill bit is engineered from high-speed steel with 5% cobalt (HSS-E Co 5%), providing superior hardness and heat resistance for demanding metalworking tasks. With a 1/16 inch (1.59 mm) cutting diameter and a 135° split point, it starts fast and cuts cleanly without walking.

Who is it for

Machinists, metal fabricators, and serious DIYers who work with alloyed and unalloyed steels, cast iron, non-ferrous metals, and plastics. This bit is ideal for precision holes in hard materials where standard HSS bits dull quickly.

Main features

• HSS-E Co 5% cobalt alloy for high wear resistance and heat tolerance
• 135° split point for accurate starting and reduced thrust pressure
• Right-hand cutting, type N helix for efficient chip evacuation
• Ground from solid to DIN 338 tolerances (h8 shank)
• Bright uncoated finish for clean cutting in a variety of materials

Specifications

• Material: HSS-E Co 5%
• Cutting diameter: 1/16 inch (1.59 mm)
• Overall length: 43 mm
• Flute length: 18 mm
• Point angle: 135°
• Shank type: Cylindrical
• Cutting direction: Right-hand
• Tolerance: h8
• Standard: DIN 338
• Recommended material hardness: up to 1100 N/mm²
• Suitable materials: Alloyed and unalloyed steels, cast iron, non-ferrous metals, plastics

Tips

Use a cutting fluid or coolant when drilling steel to extend bit life. For best results, pre-punch or center-drill the workpiece to guide the bit. Store in a dry place to prevent corrosion.