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Standard Angle: The 90-degree angle is the most common, matching the head angle of standard flat-head (countersunk) screws.
Deburring: It is highly effective for removing sharp burrs from the edges of holes, improving safety and part handling.
Chamfering: Creates a lead-in guide for pins, tools, or other components for easier assembly.
Material Suitability:
For Steel: Typically made from High-Speed Steel (HSS) or Cobalt HSS for durability and heat resistance.
For Aluminum: Often features a highly polished surface and sharp cutting edges to prevent material adhesion (galling) and ensure a smooth finish. Some may have a single-flute design for efficient chip evacuation.
Versatility: Can be used in hand drills, drill presses, and CNC machining centers.
Preparing holes for flat-head socket cap screws and other countersunk fasteners.
Deburring holes after drilling or tapping.
Creating chamfers on the edges of bores and parts.
Used in various industries, including metalworking, automotive, aerospace, and general fabrication.
Using a 90-degree countersink ensures proper seating of fasteners, reduces stress concentrations, and gives the workpiece a clean, professional appearance.
