While a spade bit may be used to drill plastic with care, it is not the best tool for the purpose. As previously stated, a step bit is suitable. However, if you must use a spade bit, go ahead but be careful not to gouge the surface.
Spur-point drill bits, also known as dowel bits, are the most effective drill bits for plastics. They are specially angled to cut the material smoothly. A spur-point bit features a central point and spurs that keep the bit aligned and the hole clean and tidy. These bits can be straight or slightly curved. The more curves there are on the bit, the more easily it will cut into soft materials.
Rough-cut drill bits are used for cutting holes into hard materials like stone or wood. They are available in different sizes and shapes to fit different applications. Some examples include gator-bit drills, milling drills, and drilling motors. These bits have cutting edges that face outward when they are not being used. When pressed against a surface, they will drill small holes, large enough for the material to enter but not leave the bit.
Drilling machines are used by professionals who need to drill holes with great precision and speed. They range from simple hand-powered devices to heavy-duty industrial models. Most contain a motor inside a housing that drives the bit via a belt or rod.
Drill bits are the tools that make up your power drill. There are several types of drill bits, each designed for a specific application. Rough-cut bits are used for cutting holes into hard materials like rock or wood.
I purchased two additional pieces, one Freud and one Freud Precision Shear, to test which I preferred for usage on wood and soft plastic. Forstner drill bits are commonly used to generate flat-bottom holes that do not go all the way through a wooden panel or board, but they may also be used to create through-holes. The purpose of using a Forstner bit is to remove more material from within the wood than would otherwise be possible with a standard drill bit.
They are designed to take advantage of the natural grain of the wood, so they will work best if you use a bit that matches the type of wood you are working with. All Forstner bits have the same overall shape, just with different cutting angles and sizes. The only real difference between bits is the size of the flutes (holes) around their outer edges. Smaller flutes mean a faster rate of removal, while larger flutes provide a better grip on the wood.
Soft plastics such as foam board and cardboard are easy to cut with a Forstner bit because there is no need to be precise. You can make large openings and/or holes in these materials by using a Forstner bit with large flutes. Hard plastics such as glass, ceramics, and stone should never be drilled with a Forstner bit. The thin walls of these materials are not strong enough to handle the pressure of a Forstner bit, which could cause them to break off inside the material.
Copper is a soft metal that can be easily drilled through with a high-speed steel drill bit. However, if you want to drill several holes, a carbide or cobalt-tipped drill bit is a better and more durable option. The trickiest aspect of drilling through copper is determining if it is a copper tube or a copper pipe. If it is copper tubing, then any standard brass drill bit will work fine. But if it is copper pipe, then you need a stainless steel drill bit.
The best way to determine what kind of material your piping is made out of is to check its internal diameter. If it has an ID of 1-1/4 inches or larger, then you can assume that it is copper tubing. Otherwise, it is probably copper pipe.
Drilling into copper requires special care. Always wear protective clothing (including gloves) when working with copper materials. Also, avoid areas where there is still paint on the copper pipes because this is flammable. Finally, make sure that you are using a certified drill press with a carbide tip or a battery-powered drill with a stainless steel bit before starting work.
Once you have determined that you will be using a brass drill bit to drill into your copper piping, take time to select one that is appropriate for the job. Make sure that the hole that you are drilling is not too large because this could cause problems later on.