Things You Need to Know About Drilling
Drilling is an operation that tends to involve a drilling machine and may also involve other different tools. Among the operations that can be performed using a drilling machine include drilling, counter-boring, boring, reaming, trepanning, tapping, and countersinking. Drilling tends to be an operation of the production of cylindrical holes and tend to remove material such as metal, soil or wood by rotating edge of a cutting tool referred to as drill. It tends to be the simplest method of producing a hoe. Drilling, however, is not known to produce an accurate hole in a workpiece. Drilling, especially in metals, tends to have the internal interface of the hole in question being rough and slightly oversize as a result of vibrations of the drill and the spindle.
Reaming on the other end tends to be used in a case where the size of the hole needs to be accurate and smooth. Reaming tends to be accurate in both sizing and finishing a hole which is drilled using a tool known as a reamer. A reamer tends to provide a smoother and more accurate hole when it comes to the diameter of the interior of the hole. One would also need to note that the speed of the spindle tends to be just a half that of drilling. Reaming also tends to remove only a small amount of metal and tends to involve drilling the hole slightly undersize before finishing it and bringing it to the accurate size.
Boring also tends to be an operation that focuses on the enlarging of the diameter of an existing hole. Boring tends to involve enlarging a hole using adjustable cutting. In a case where the suitable drill is not available, this method may be used to make the hole accurate especially where the next drill is so large and hence not applicable in the desired hole. Boring may also be used to correct the roundness of the hole.
Counter-boring on the other end tends to involve enlarging the end of the hole. Counter-boring is focused on forming square shoulders with the original hole especially in a case where you need to accommodate studs, bolts, and spins. A counterbore tends to be used in counterboring.
Countersinking, on the other hand, tends to focus on making cone-shaped enlargement especially at the end of the hole. The tool used in this process is known as a countersink and tends to have multiple cutting edges on its conical surface. Countersinking tends to have a quarter speed that of drilling.
Spot facing is focused on squaring and smoothing the surface around a hole. It is mainly done to ensure that the nut or the screw sits properly in the hole in question. Tapping is used to cutting internal threads using a tool referred to as a tap. Tapping may either be used by power or hand. Trepanning also falls under drilling and tends to involve producing a hole in sheet metal by producing large holes. It involves the removal of metal along the circumference of a tool used in hollow cutting. This method tends to involve very little loss of materials. The tool can be operated at a high speed but the speed tends to depend on the diameter of the intended hole.