You mean an 'auger bit'. The only requirement is to be sharp.
To drill a flat bottom hole, use a drill bit with a flat end or a spade bit. Make sure the drill is set to a low speed and apply even pressure while drilling. Keep the drill perpendicular to the surface to ensure a flat bottom hole.
A Forstner bit drills flat bottom holes.
For creating flat-bottomed holes in woodworking projects, a Forstner drill bit is commonly used.
A Forstner drill bit is used for drilling flat-bottomed holes in wood. It differs from other drill bits because it has a sharp, flat cutting edge that allows for precise and clean cuts, making it ideal for woodworking projects that require a smooth finish.
The best way to choose the right hammer drill bit for a specific project is to consider the material you will be drilling into, the size of the hole needed, and the type of hammer drill you will be using. Match the drill bit material and size to the project requirements for best results.
For hollowing out a log, the best drill bit to use is a Forstner bit. These bits are designed specifically for creating flat-bottomed holes and are ideal for woodworking projects like hollowing out logs.
To put a drill bit in a drill, you typically loosen the chuck, insert the drill bit into the chuck, and then tighten the chuck securely to hold the drill bit in place.
metal drill bit has a finer point
A titanium or cobalt drill bit.
A chuck key is used to remove a drill bit from a drill.
A drill bit size of .376 inches is equivalent to a 3/8 inch drill bit, which is slightly smaller than 3/8 inch (0.375 inches) and larger than 13/32 inch (0.40625 inches). In metric terms, this is approximately 9.55 mm. It’s important to choose the right drill bit size based on the specific requirements of your project.
The best type of drill bit for plexiglass is a carbide-tipped drill bit.