Drilling is a form of cutting where it is done by using a drill bit to create circular holes in solid materials. The drill bit is the cutting tool that is attached to a drill that functions in a rotary cycle. The drilling process begins by pressing the drill bit that is securely attached to the drill and have it rotate at different rates that can range up to thousands of revolutions in one minute. The force generated from the drill creates the cutting against the piece which chips of the material in order to create a hole. But when it comes to drilling holes, instead of a circular cutting motion with a rotating drill bit, the hole is made by repeatedly hammering the drill bit into the ground with short movements.
The mechanical properties of a workpiece can be potentially affected with drilling due to the creation of low level residual stresses that forms around the opening of the drilled hole paired with a newly formed surface on a disturbed workpiece material that has an incredibly thin layer of stress. The drilling process can potentially increase the possibility of corrosion on the workpiece and create cracks due to a stressed surface.
It is often recommended for drilled holes to be placed at a perpendicular section on the surface of a workpiece material as this greatly minimizes the drill bit to move even at the slightest. The drill press will have a higher tendency to move out of accuracy if the length-to-diameter ratio of the drill bit is higher.
As the drilling process can be hazardous due the sharp corners of the drill bit , it is always advised to at least wear protective goggles and gloves to prevent injuries such as accidentally cutting a finger or a wood chip flow into the eyes no matter what type of drill you have, be it a bench drill press, drill press floor or a hand drill, safety is always first..