RUKO HGB-DIN2181-HSS-60°-1/4x Centre Drill

Creating precise centering holes for subsequent drilling or turning operations can be challenging without the right tool. The RUKO HGB-DIN2181-HSS-60°-1/4x centre drill solves this by providing a combination drill and countersink in one tool, ensuring accurate positioning and clean chamfers.

Who is it for

Machinists, metalworkers, and technicians who need reliable centering holes in alloyed and unalloyed steels, cast iron, non-ferrous metals, and plastics.

Main features

• DIN 2181 A compliant, type A without protecting chamfer.
• Made from HSS-E (high-speed steel with cobalt) for improved hardness and heat resistance.
• 60° countersink angle for standard centre holes.
• Ground from solid for precision and durability.
• Straight flute design with right-hand cutting direction.
• Bright uncoated surface finish.

Specifications

• Tool type: Centre drill
• Standard: DIN 2181 A
• Material: HSS-E
• Pilot drill diameter: 1.0 mm
• Body diameter: 3.15 mm
• Overall length: 31.5 mm
• Countersink angle: 60°
• Shank diameter: 3.15 mm
• Cutting edge type: Combination drill & countersink
• Flute design: Straight flute
• Cutting direction: Right-hand
• Surface finish: Bright (uncoated)
• Application: Centering holes for turning, grinding, and subsequent drilling
• Suitable materials: Alloyed and unalloyed steels, cast iron, non-ferrous metals, plastics
• Precision grade: Industrial grade
• Manufacturing process: Ground from solid

Tips

Use appropriate cutting speed and feed for HSS-E in the workpiece material. Ensure the centre drill is securely held in a chuck or collet to avoid runout.