CONQUER Tools 5-Flute 87° Countersink Drill Bit — 1/4in Hex Shank, 3-19 mm Holes

Overview: fast, precise burr removal for clean finishes

The CONQUER Tools 5-Flute 87° Countersink Drill Bit is built to clean internal pipe ends quickly and safely. Crafted from durable alloy steel, this countersink blends aggressive cutting geometry with controlled chamfering to smoothly remove damaged metal and burrs, leaving a crisp edge ready for assembly or finishing.

Designed for practical reliability, this tool is suitable for holes from 3 mm to 19 mm in diameter, enabling a single solution for a range of common fabrication tasks. The 1/4 inch quick-change hex shank ensures quick, hassle-free swaps between drills or press-mounted setups, so you can move from prep to finishing with minimal downtime.

Key capabilities

• 5-flute geometry enhances material removal while maintaining control and edge quality
• 87-degree countersink bevel provides a clean, consistent chamfer on edges
• Hole range 3–19 mm supports diverse part sizes and designs
• 1/4 inch quick-change hex shank enables fast tool changes on handheld and stationary drills
• Versatile across metals and plastics, including stainless steel, hardened steel, mild steel, copper, brass, and many plastics

Materials and practical uses

• Compatible with stainless steel, hardened steel, mild steel for robust deburring and edge prep
• Effective on copper, brass, and various plastics where clean edges matter
• Ideal for burr removal, deburring, beveling, chamfering, and shaping holes as part of an assembly workflow

Real-world scenarios and tips

In metalworking or plumbing projects, users often encounter jagged edges that hinder fitment. This countersink helps create a smooth entry and a neat finish, reducing the need for secondary finishing steps. Use with steady feeds and moderate speeds to preserve edge integrity, and inspect the finish after first pass before continuing with subsequent passes.

To maximize performance, secure the workpiece firmly, use appropriate lubrication as needed, and select the correct drill speed for the material. The combination of alloy steel construction and precise geometry can contribute to consistent results across multiple parts, making it a practical addition to both professional workshops and DIY setups.

Care and maintenance

Keep the cutting edges sharp and free from debris. Wipe clean after use and store in a dry location to prevent corrosion. Regular checks for burrs or chip buildup help maintain consistent performance over time.