What different types of drill bits do you use? Are you sure every drill bit comes in a specific size? In this article, you will learn about all types of drill bits, from carbide cutting tools to deep hole drill bits and their uses.
1. Jobber drill bits
Jobber drill bits are used to drill holes in various materials. These drills have the same basic shape and size as twist drills but have four to six cutting edges instead of one. The multiple cutting edges reduce the time for deep hole drill in metal and other hard materials. Jobber drill bits are available in various sizes, from micro drill bits for making pilot holes for screws to larger diameter bits for drilling larger holes.
2. Screw machine drill bits
Screw machine drill bits are designed for use in screw machines to make metal parts for industrial applications. These tools have a round shank that fits into the machine's spindle, providing power and rotation as it moves along its axis. A holder clamps onto the end of the bit to stay in place while drilling takes place without slipping out or moving around on its own accord.
3. Reduced-shank drill bits
These drill bits have a reduced shank, allowing them to be used in tight spaces. The smaller size allows for more flexibility and movement in the bit.
The reduced-shank drill bits are used for deep hole drill woodworking, metalworking, and other projects requiring hard surface drilling. The smaller head makes it easier to achieve precision holes with these types of drills.
4. Aircraft extension drill bits
Aircraft extension drill bits are used through thick metal or hardened steel. These extensions allow you to reach deeper into the material without damaging your existing bit or causing damage to your work surface or bench grinder wheel.
5. Black oxide, black and gold, and titanium-coated drill bits
Black oxide, black and gold, and titanium-coated drill bits are used to drill through steel. The coatings make the drill bit longer-lasting and more resistant to heat. They also lubricate the drill bit to cut through metal more easily.
Titanium-coated metal drill bits are made from high-speed steel with a titanium coating that protects them from corrosion when exposed to moisture in the air. These drills can be used for drilling through all types of metals, including aluminum, steel, brass, and copper.
6. Carbide cutting tool or the Carbide-tipped metal drill bits
The carbide cutting tool or the Carbide-tipped metal drill bits are made of tungsten carbide or cobalt chromium molybdenum steel. They are used for drilling through various materials such as cast iron, carbon steel, ductile iron, and nonferrous metals such as copper. The carbide cutting tool tips allow you to use these drills on harder materials than other drills can handle.
7. Twist Drill Bits
Twist drill bits are made for deep hole drill in wood, plastic, and metal. They come in various sizes, from 1/8″ to 3/4″. They are made from high-speed steel and are available in two types of shanks: tapered and straight. The most common type of twist drill bit is the brad-point bit. This bit has a chisel point that allows you to start a hole without marring the surface being drilled into.
The other type of twist drill bit is a spur point bit with no chisel point and will leave behind a rough edge when drilling into soft materials such as wood or plastic. Countersink bits have micro drill bits flutes (grooves) cut into them. When inserted into wood or plastic, they allow for easy excess material removal after drilling with a countersink or counterbore tool.
8. Countersink Bits
A countersink bit is similar to a twist drill bit but has a thread tap end designed for use with countersink hardware. The thread tap allows the bit to cut through material without leaving burrs or sharp edges, which can be dangerous when using power tools not equipped with safety features such as guards or feeds.
9. Brad-Point Drill Bits
Brad-point bits are made with a helical flute design and have a tip that is the same diameter as the shank. These bits are used for drilling into wood and other soft materials but can also be used for drilling into softer metals like aluminum or zinc. The fluted design helps to clear debris from the hole as it's being drilled, which keeps the bit from clogging up and becoming dull.
10. Forstner Bits
Forstner bits are flat with a circular opening in the middle of them. They are used for deep hole drill in wood, plastic, and other soft materials, but they do not work well on harder materials like metal or concrete. These bits are named after Charles Forstner, who invented them in 1848.
11. Masonry Bits
Masonry bits are designed for drilling holes through brick or concrete. They have a tapered tip that allows them to cut through the material and a pilot point at the end of the bit that helps prevent it from slipping out of place while it is cutting. These drill bits can be useful when making holes in brick or concrete walls for plumbing repairs or electrical work.
Conclusion
So there you have it. That is what kinds of drill bits are available on the market. Investing in a set or two that suits your needs is worthwhile if you often drill. Keep in mind it's usually much more economical to buy them in kits, but also make sure you know what size and type of drill bit you need before purchasing any type of kit.
