Countersink Cutters - 41 degrees p.s.

Conical Tool countersink cutters are normally used to mill or spot drill an 82° (included)conical shaped hole into a machined workpiece. A common usage is to allow the head of a countersunk screw, when placed in the hole, to sit flush with or below the surface of the surrounding material. A Conical countersink cutter (click image to view slideshow) may also be used to remove the burrs left from a drilling or tapping operation thereby improving the finish of the product and removing any hazardous sharp edges. The basic geometry of a countersink (cutter) inherently can be applied to the plunging applications described above (axial feed only) and also standard milling applications like side-milling. The fluted countersink cutter is used to provide a heavy chamfer in the entrance to a drilled hole. This may be required to allow the correct seating for a countersunk-head screw or to provide the lead in for a second machining operation, such as tapping. Countersink cutters are manufactured with six common angles, which are 60°, 82°, 90°, 100°, 110°, or 120°, with the two most common of those being 82° and 90°. Conical Tool countersink cutters have a 41° angle per side on our stock cutters.

Avoiding chatter during machining

As in many other machining operations, an appropriate response to the chatter may be to decrease speed and increase feed. On a drill press, the slowest available spindle speed is usually best. Please contact us with any questions.