RUKO HGB-DIN2181-HSS-60°-7/8x Countersink Bit

Deburring and chamfering holes in metal or plastic often leaves sharp edges that can damage fasteners or injure hands. This RUKO HGB countersink bit removes those burrs and creates clean, precise 60° chamfers in a single pass.

Who is it for

Machinists, metalworkers, and maintenance technicians who need a reliable countersink for steel, cast iron, non-ferrous metals, and plastics. Suitable for use in drill presses, lathes, and hand drills with a 10 mm cylindrical shank.

Main features

• High-speed steel (HSS) body with a bright finish for durability and corrosion resistance.
• 60° cutting angle with three ground flutes for smooth, chatter-free countersinking.
• Maximum countersink diameter of 22.2 mm (7/8 inch) for large holes.
• Cylindrical shank, 10 mm diameter, fits standard drill chucks.
• Right-hand cutting direction, conforming to DIN 335 C profile.

Specifications

• Tool type: Countersink bit
• Material: High-speed steel (HSS)
• Cutting angle: 60°
• Maximum diameter (d1): 22.2 mm (7/8 inch)
• Shank type: Cylindrical
• Shank diameter (d2): 10 mm
• Total length (L1): 63 mm
• Number of flutes: 3
• Surface finish: Bright
• Standard: DIN 335 C
• Application: Deburring, chamfering, countersinking
• Suitable materials: Steel, cast iron, non-ferrous metals, plastics
• Cutting direction: Right-hand

Tips

Use a cutting fluid on steel to extend tool life. For best results, run at moderate speeds and apply steady pressure to avoid chatter.