How to Use a Countersink Drill Bit
Whether you need to countersink a hole in wood, steel or plastic, you can use a countersink drill bit to get the job done quickly and easily. By running the RPM's very low, you can get a great finish on your countersink in steel and they can be used in had drills for all different types of material.
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Instructions
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Insert a countersink drill bit into a tool holder for use in a CNC mill. Use a collet slightly larger than the diameter of the shank of the bit. As you tighten the holder, the collet will clamp down on the shank and assure that the bit will not move while it is cutting.
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Teach the tool. To teach a tool in a CNC machine, you must put the machine in teaching mode and call the tool number in the machine. The machine will automatically retrieve the tool and use the teaching probe to locate its tip. It will use this location for dimensional cuts.
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Set the Z depth in the program to counter sink one or more holes based on their location on the work table. A CNC is capable of countersinking an infinite number of holes automatically. You can set the depth deep for large holes and shallow for small holes. You want the countersink to be deep enough for any screw heads to sit flush with the surface of the piece.
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Insert a countersink drill bit into a chuck on a manual mill. You can use the countersink in a similar way as a drill bit. With a manual mill, you use the handle to raise and lower the bit to the surface of the work piece. You can set your Z zero depth by setting the countersink bit on the surface of the piece and resetting your depth micrometer to zero or just eyeballing the depth of the countersink.
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Insert a countersink drill bit into a hand drill. This can be used to countersink holes in wood and also on metal parts that are done in a CNC or manual mill. It is a great way to de-burr holes. De-burring is the process of removing sharp edges from metal. A cobalt or carbide countersink drill bit can de-burr steel and a steel bit will work great on wood and aluminum.
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Tips & Warnings
RPM's should be low when using a countersink drill bit on steel as the speed will destroy the tip as these bits are made to be run at less than 1000 RPM.
